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+To: vim_dev@googlegroups.com
+Subject: Patch 8.1.1366
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 8.1.1366
+Problem: Using expressions in a modeline is unsafe.
+Solution: Disallow using expressions in a modeline, unless the
+ 'modelineexpr' option is set. Update help, add more tests.
+Files: runtime/doc/options.txt, src/option.c, src/option.h,
+ src/testdir/test_modeline.vim, src/testdir/test49.in
+
+
+*** ../vim-8.1.1365/runtime/doc/options.txt 2019-05-05 18:11:46.320590639 +0200
+--- runtime/doc/options.txt 2019-05-23 15:14:40.692739911 +0200
+***************
+*** 578,591 ****
+ /* vi:set dir=c\:\tmp: */ ~
+ This sets the 'dir' option to "c:\tmp". Only a single backslash before the
+ ':' is removed. Thus to include "\:" you have to specify "\\:".
+!
+ No other commands than "set" are supported, for security reasons (somebody
+ might create a Trojan horse text file with modelines). And not all options
+! can be set. For some options a flag is set, so that when it's used the
+! |sandbox| is effective. Still, there is always a small risk that a modeline
+! causes trouble. E.g., when some joker sets 'textwidth' to 5 all your lines
+! are wrapped unexpectedly. So disable modelines before editing untrusted text.
+! The mail ftplugin does this, for example.
+
+ Hint: If you would like to do something else than setting an option, you could
+ define an autocommand that checks the file for a specific string. For
+--- 578,594 ----
+ /* vi:set dir=c\:\tmp: */ ~
+ This sets the 'dir' option to "c:\tmp". Only a single backslash before the
+ ':' is removed. Thus to include "\:" you have to specify "\\:".
+! *E992*
+ No other commands than "set" are supported, for security reasons (somebody
+ might create a Trojan horse text file with modelines). And not all options
+! can be set. For some options a flag is set, so that when the value is used
+! the |sandbox| is effective. Some options can only be set from the modeline
+! when 'modelineexpr' is set (the default is off).
+!
+! Still, there is always a small risk that a modeline causes trouble. E.g.,
+! when some joker sets 'textwidth' to 5 all your lines are wrapped unexpectedly.
+! So disable modelines before editing untrusted text. The mail ftplugin does
+! this, for example.
+
+ Hint: If you would like to do something else than setting an option, you could
+ define an autocommand that checks the file for a specific string. For
+***************
+*** 795,803 ****
+ a different way.
+ The 'autoindent' option is reset when the 'paste' option is set and
+ restored when 'paste' is reset.
+- {small difference from Vi: After the indent is deleted when typing
+- <Esc> or <CR>, the cursor position when moving up or down is after the
+- deleted indent; Vi puts the cursor somewhere in the deleted indent}.
+
+ *'autoread'* *'ar'* *'noautoread'* *'noar'*
+ 'autoread' 'ar' boolean (default off)
+--- 798,803 ----
+***************
+*** 1121,1127 ****
+ {only available when compiled with the |+balloon_eval|
+ feature}
+ Expression for text to show in evaluation balloon. It is only used
+! when 'ballooneval' is on. These variables can be used:
+
+ v:beval_bufnr number of the buffer in which balloon is going to show
+ v:beval_winnr number of the window
+--- 1121,1128 ----
+ {only available when compiled with the |+balloon_eval|
+ feature}
+ Expression for text to show in evaluation balloon. It is only used
+! when 'ballooneval' or 'balloonevalterm' is on. These variables can be
+! used:
+
+ v:beval_bufnr number of the buffer in which balloon is going to show
+ v:beval_winnr number of the window
+***************
+*** 1132,1138 ****
+
+ The evaluation of the expression must not have side effects!
+ Example: >
+! function! MyBalloonExpr()
+ return 'Cursor is at line ' . v:beval_lnum .
+ \', column ' . v:beval_col .
+ \ ' of file ' . bufname(v:beval_bufnr) .
+--- 1133,1139 ----
+
+ The evaluation of the expression must not have side effects!
+ Example: >
+! function MyBalloonExpr()
+ return 'Cursor is at line ' . v:beval_lnum .
+ \', column ' . v:beval_col .
+ \ ' of file ' . bufname(v:beval_bufnr) .
+***************
+*** 1151,1156 ****
+--- 1152,1158 ----
+
+ The expression will be evaluated in the |sandbox| when set from a
+ modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'balloonexpr' |textlock|.
+***************
+*** 2677,2683 ****
+ uses another default.
+ This option cannot be set from a |modeline| or in the |sandbox|, for
+ security reasons.
+- {Vi: directory to put temp file in, defaults to "/tmp"}
+
+ *'display'* *'dy'*
+ 'display' 'dy' string (default "", set to "truncate" in
+--- 2679,2684 ----
+***************
+*** 3229,3235 ****
+ The expression will be evaluated in the |sandbox| if set from a
+ modeline, see |sandbox-option|.
+ This option can't be set from a |modeline| when the 'diff' option is
+! on.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'foldexpr' |textlock|.
+--- 3230,3236 ----
+ The expression will be evaluated in the |sandbox| if set from a
+ modeline, see |sandbox-option|.
+ This option can't be set from a |modeline| when the 'diff' option is
+! on or the 'modelineexpr' option is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'foldexpr' |textlock|.
+***************
+*** 3362,3367 ****
+--- 3363,3369 ----
+
+ The expression will be evaluated in the |sandbox| if set from a
+ modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'foldtext' |textlock|.
+***************
+*** 3399,3404 ****
+--- 3401,3407 ----
+ The expression will be evaluated in the |sandbox| when set from a
+ modeline, see |sandbox-option|. That stops the option from working,
+ since changing the buffer text is not allowed.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+ NOTE: This option is set to "" when 'compatible' is set.
+
+ *'formatlistpat'* *'flp'*
+***************
+*** 3455,3460 ****
+--- 3458,3465 ----
+ Also see 'swapsync' for controlling fsync() on swap files.
+ 'fsync' also applies to |writefile()|, unless a flag is used to
+ overrule it.
++ This option cannot be set from a |modeline| or in the |sandbox|, for
++ security reasons.
+
+ *'gdefault'* *'gd'* *'nogdefault'* *'nogd'*
+ 'gdefault' 'gd' boolean (default off)
+***************
+*** 3622,3628 ****
+ *'guiheadroom'* *'ghr'*
+ 'guiheadroom' 'ghr' number (default 50)
+ global
+! - {only for GTK and X11 GUI}
+ The number of pixels subtracted from the screen height when fitting
+ the GUI window on the screen. Set this before the GUI is started,
+ e.g., in your |gvimrc| file. When zero, the whole screen height will
+--- 3627,3633 ----
+ *'guiheadroom'* *'ghr'*
+ 'guiheadroom' 'ghr' number (default 50)
+ global
+! {only for GTK and X11 GUI}
+ The number of pixels subtracted from the screen height when fitting
+ the GUI window on the screen. Set this before the GUI is started,
+ e.g., in your |gvimrc| file. When zero, the whole screen height will
+***************
+*** 3780,3785 ****
+--- 3785,3791 ----
+ 'guitabtooltip' is used for the tooltip, see below.
+ The expression will be evaluated in the |sandbox| when set from a
+ modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ Only used when the GUI tab pages line is displayed. 'e' must be
+ present in 'guioptions'. For the non-GUI tab pages line 'tabline' is
+***************
+*** 4030,4035 ****
+--- 4036,4042 ----
+ When this option contains printf-style '%' items, they will be
+ expanded according to the rules used for 'statusline'. See
+ 'titlestring' for example settings.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+ {not available when compiled without the |+statusline| feature}
+
+ *'ignorecase'* *'ic'* *'noignorecase'* *'noic'*
+***************
+*** 4047,4052 ****
+--- 4054,4061 ----
+ This option specifies a function that will be called to
+ activate or deactivate the Input Method.
+ It is not used in the GUI.
++ The expression will be evaluated in the |sandbox| when set from a
++ modeline, see |sandbox-option|.
+
+ Example: >
+ function ImActivateFunc(active)
+***************
+*** 4163,4168 ****
+--- 4172,4179 ----
+ set imstatusfunc=ImStatusFunc
+ <
+ NOTE: This function is invoked very often. Keep it fast.
++ The expression will be evaluated in the |sandbox| when set from a
++ modeline, see |sandbox-option|.
+
+ *'imstyle'* *'imst'*
+ 'imstyle' 'imst' number (default 1)
+***************
+*** 4179,4184 ****
+--- 4190,4197 ----
+ |single-repeat|, etc. Therefore over-the-spot style becomes the
+ default now. This should work fine for most people, however if you
+ have any problem with it, try using on-the-spot style.
++ The expression will be evaluated in the |sandbox| when set from a
++ modeline, see |sandbox-option|.
+
+ *'include'* *'inc'*
+ 'include' 'inc' string (default "^\s*#\s*include")
+***************
+*** 4213,4218 ****
+--- 4226,4232 ----
+
+ The expression will be evaluated in the |sandbox| when set from a
+ modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'includeexpr' |textlock|.
+***************
+*** 4300,4305 ****
+--- 4314,4320 ----
+
+ The expression will be evaluated in the |sandbox| when set from a
+ modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'indentexpr' |textlock|.
+***************
+*** 4707,4713 ****
+ "=" operator to use this same indentation algorithm rather than
+ calling an external program if 'equalprg' is empty.
+ This option is not used when 'paste' is set.
+- {Vi: Does it a little bit differently}
+
+ *'lispwords'* *'lw'*
+ 'lispwords' 'lw' string (default is very long)
+--- 4722,4727 ----
+***************
+*** 4897,4902 ****
+--- 4911,4922 ----
+ < This option cannot be set from a |modeline| or in the |sandbox|, for
+ security reasons.
+
++ *'makespellmem'* *'msm'*
++ 'makespellmem' 'msm' string (default "460000,2000,500")
++ global
++ Values relevant only when compressing a spell file, see |spell|.
++ This option cannot be set from a |modeline| or in the |sandbox|.
++
+ *'matchpairs'* *'mps'*
+ 'matchpairs' 'mps' string (default "(:),{:},[:]")
+ local to buffer
+***************
+*** 4919,4925 ****
+ *'matchtime'* *'mat'*
+ 'matchtime' 'mat' number (default 5)
+ global
+- {in Nvi}
+ Tenths of a second to show the matching paren, when 'showmatch' is
+ set. Note that this is not in milliseconds, like other options that
+ set a time. This is to be compatible with Nvi.
+--- 4939,4944 ----
+***************
+*** 5053,5058 ****
+--- 5072,5088 ----
+ 'modeline' 'ml' boolean (Vim default: on (off for root),
+ Vi default: off)
+ local to buffer
++ If 'modeline' is on 'modelines' gives the number of lines that is
++ checked for set commands. If 'modeline' is off or 'modelines' is zero
++ no lines are checked. See |modeline|.
++
++ *'modelineexpr'* *'mle'* *'nomodelineexpr'* *'nomle'*
++ 'modelineexpr' 'mle' boolean (default: off)
++ global
++ When on allow some options that are an expression to be set in the
++ modeline. Check the option for whether it is affected by
++ 'modelineexpr'. Also see |modeline|.
++
+ *'modelines'* *'mls'*
+ 'modelines' 'mls' number (default 5)
+ global
+***************
+*** 5063,5071 ****
+ set and to the Vim default value when 'compatible' is reset.
+
+ *'modifiable'* *'ma'* *'nomodifiable'* *'noma'*
+ 'modifiable' 'ma' boolean (default on)
+ local to buffer
+- *E21*
+ When off the buffer contents cannot be changed. The 'fileformat' and
+ 'fileencoding' options also can't be changed.
+ Can be reset on startup with the |-M| command line argument.
+--- 5093,5101 ----
+ set and to the Vim default value when 'compatible' is reset.
+
+ *'modifiable'* *'ma'* *'nomodifiable'* *'noma'*
++ *E21*
+ 'modifiable' 'ma' boolean (default on)
+ local to buffer
+ When off the buffer contents cannot be changed. The 'fileformat' and
+ 'fileencoding' options also can't be changed.
+ Can be reset on startup with the |-M| command line argument.
+***************
+*** 6062,6067 ****
+--- 6092,6099 ----
+ When this option is not empty, it determines the content of the ruler
+ string, as displayed for the 'ruler' option.
+ The format of this option is like that of 'statusline'.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
++
+ The default ruler width is 17 characters. To make the ruler 15
+ characters wide, put "%15(" at the start and "%)" at the end.
+ Example: >
+***************
+*** 6585,6591 ****
+ O message for reading a file overwrites any previous message.
+ Also for quickfix message (e.g., ":cn").
+ s don't give "search hit BOTTOM, continuing at TOP" or "search
+! hit TOP, continuing at BOTTOM" messages
+ t truncate file message at the start if it is too long to fit
+ on the command-line, "<" will appear in the left most column.
+ Ignored in Ex mode.
+--- 6617,6624 ----
+ O message for reading a file overwrites any previous message.
+ Also for quickfix message (e.g., ":cn").
+ s don't give "search hit BOTTOM, continuing at TOP" or "search
+! hit TOP, continuing at BOTTOM" messages; when using the search
+! count do not show "W" after the count message (see S below)
+ t truncate file message at the start if it is too long to fit
+ on the command-line, "<" will appear in the left most column.
+ Ignored in Ex mode.
+***************
+*** 6601,6607 ****
+ "Pattern not found", "Back at original", etc.
+ q use "recording" instead of "recording @a"
+ F don't give the file info when editing a file, like `:silent`
+! was used for the command
+ S do not show search count message when searching, e.g.
+ "[1/5]"
+
+--- 6634,6641 ----
+ "Pattern not found", "Back at original", etc.
+ q use "recording" instead of "recording @a"
+ F don't give the file info when editing a file, like `:silent`
+! was used for the command; note that this also affects messages
+! from autocommands
+ S do not show search count message when searching, e.g.
+ "[1/5]"
+
+***************
+*** 7168,7173 ****
+--- 7202,7208 ----
+
+ The 'statusline' option will be evaluated in the |sandbox| if set from
+ a modeline, see |sandbox-option|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ It is not allowed to change text or jump to another window while
+ evaluating 'statusline' |textlock|.
+***************
+*** 7348,7353 ****
+--- 7383,7389 ----
+
+ When changing something that is used in 'tabline' that does not
+ trigger it to be updated, use |:redrawtabline|.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
+
+ Keep in mind that only one of the tab pages is the current one, others
+ are invisible and you can't jump to their windows.
+***************
+*** 7443,7449 ****
+ must be included in the tags file.
+ This option doesn't affect commands that find all matching tags (e.g.,
+ command-line completion and ":help").
+- {Vi: always uses binary search in some versions}
+
+ *'tagcase'* *'tc'*
+ 'tagcase' 'tc' string (default "followic")
+--- 7479,7484 ----
+***************
+*** 7507,7513 ****
+ The use of |:set+=| and |:set-=| is preferred when adding or removing
+ file names from the list. This avoids problems when a future version
+ uses another default.
+- {Vi: default is "tags /usr/lib/tags"}
+
+ *'tagstack'* *'tgst'* *'notagstack'* *'notgst'*
+ 'tagstack' 'tgst' boolean (default on)
+--- 7542,7547 ----
+***************
+*** 7878,7885 ****
+--- 7912,7922 ----
+ non-empty 't_ts' option).
+ When Vim was compiled with HAVE_X11 defined, the original title will
+ be restored if possible, see |X11|.
++
+ When this option contains printf-style '%' items, they will be
+ expanded according to the rules used for 'statusline'.
++ This option cannot be set in a modeline when 'modelineexpr' is off.
++
+ Example: >
+ :auto BufEnter * let &titlestring = hostname() . "/" . expand("%:p")
+ :set title titlestring=%<%F%=%l/%L-%P titlelen=70
+***************
+*** 8065,8070 ****
+--- 8102,8109 ----
+ undo file that exists is used. When it cannot be read an error is
+ given, no further entry is used.
+ See |undo-persistence|.
++ This option cannot be set from a |modeline| or in the |sandbox|, for
++ security reasons.
+
+ *'undofile'* *'noundofile'* *'udf'* *'noudf'*
+ 'undofile' 'udf' boolean (default off)
+***************
+*** 8374,8379 ****
+--- 8413,8420 ----
+ When equal to "NONE" no viminfo file will be read or written.
+ This option can be set with the |-i| command line flag. The |--clean|
+ command line flag sets it to "NONE".
++ This option cannot be set from a |modeline| or in the |sandbox|, for
++ security reasons.
+
+ *'virtualedit'* *'ve'*
+ 'virtualedit' 've' string (default "")
+***************
+*** 8783,8790 ****
+ When 'textwidth' is non-zero, this option is not used.
+ This option is set to 0 when 'paste' is set and restored when 'paste'
+ is reset.
+! See also 'formatoptions' and |ins-textwidth|. {Vi: works differently
+! and less usefully}
+
+ *'wrapscan'* *'ws'* *'nowrapscan'* *'nows'*
+ 'wrapscan' 'ws' boolean (default on) *E384* *E385*
+--- 8824,8830 ----
+ When 'textwidth' is non-zero, this option is not used.
+ This option is set to 0 when 'paste' is set and restored when 'paste'
+ is reset.
+! See also 'formatoptions' and |ins-textwidth|.
+
+ *'wrapscan'* *'ws'* *'nowrapscan'* *'nows'*
+ 'wrapscan' 'ws' boolean (default on) *E384* *E385*
+*** ../vim-8.1.1365/src/option.c 2019-05-19 19:59:30.164255569 +0200
+--- src/option.c 2019-05-23 14:35:57.497475468 +0200
+***************
+*** 467,472 ****
+--- 467,473 ----
+ * there is a redraw flag */
+ #define P_NDNAME 0x8000000L /* only normal dir name chars allowed */
+ #define P_RWINONLY 0x10000000L /* only redraw current window */
++ #define P_MLE 0x20000000L /* under control of 'modelineexpr' */
+
+ #define ISK_LATIN1 (char_u *)"@,48-57,_,192-255"
+
+***************
+*** 650,656 ****
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
+ #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
+ (char_u *)&p_bexpr, PV_BEXPR,
+ {(char_u *)"", (char_u *)0L}
+--- 651,657 ----
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM|P_MLE,
+ #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
+ (char_u *)&p_bexpr, PV_BEXPR,
+ {(char_u *)"", (char_u *)0L}
+***************
+*** 727,733 ****
+ (char_u *)&p_cmp, PV_NONE,
+ {(char_u *)"internal,keepascii", (char_u *)0L}
+ SCTX_INIT},
+! {"cdpath", "cd", P_STRING|P_EXPAND|P_VI_DEF|P_COMMA|P_NODUP,
+ #ifdef FEAT_SEARCHPATH
+ (char_u *)&p_cdpath, PV_NONE,
+ {(char_u *)",,", (char_u *)0L}
+--- 728,734 ----
+ (char_u *)&p_cmp, PV_NONE,
+ {(char_u *)"internal,keepascii", (char_u *)0L}
+ SCTX_INIT},
+! {"cdpath", "cd", P_STRING|P_EXPAND|P_VI_DEF|P_SECURE|P_COMMA|P_NODUP,
+ #ifdef FEAT_SEARCHPATH
+ (char_u *)&p_cdpath, PV_NONE,
+ {(char_u *)",,", (char_u *)0L}
+***************
+*** 1175,1181 ****
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"foldexpr", "fde", P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
+ #if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
+ (char_u *)VAR_WIN, PV_FDE,
+ {(char_u *)"0", (char_u *)NULL}
+--- 1176,1182 ----
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"foldexpr", "fde", P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN|P_MLE,
+ #if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
+ (char_u *)VAR_WIN, PV_FDE,
+ {(char_u *)"0", (char_u *)NULL}
+***************
+*** 1258,1264 ****
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"foldtext", "fdt", P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN,
+ #if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
+ (char_u *)VAR_WIN, PV_FDT,
+ {(char_u *)"foldtext()", (char_u *)NULL}
+--- 1259,1265 ----
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"foldtext", "fdt", P_STRING|P_ALLOCED|P_VIM|P_VI_DEF|P_RWIN|P_MLE,
+ #if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
+ (char_u *)VAR_WIN, PV_FDT,
+ {(char_u *)"foldtext()", (char_u *)NULL}
+***************
+*** 1267,1273 ****
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"formatexpr", "fex", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
+ #ifdef FEAT_EVAL
+ (char_u *)&p_fex, PV_FEX,
+ {(char_u *)"", (char_u *)0L}
+--- 1268,1274 ----
+ {(char_u *)NULL, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"formatexpr", "fex", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM|P_MLE,
+ #ifdef FEAT_EVAL
+ (char_u *)&p_fex, PV_FEX,
+ {(char_u *)"", (char_u *)0L}
+***************
+*** 1406,1412 ****
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
+! {"guitablabel", "gtl", P_STRING|P_VI_DEF|P_RWIN,
+ #if defined(FEAT_GUI_TABLINE)
+ (char_u *)&p_gtl, PV_NONE,
+ {(char_u *)"", (char_u *)0L}
+--- 1407,1413 ----
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
+! {"guitablabel", "gtl", P_STRING|P_VI_DEF|P_RWIN|P_MLE,
+ #if defined(FEAT_GUI_TABLINE)
+ (char_u *)&p_gtl, PV_NONE,
+ {(char_u *)"", (char_u *)0L}
+***************
+*** 1477,1483 ****
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"iconstring", NULL, P_STRING|P_VI_DEF,
+ #ifdef FEAT_TITLE
+ (char_u *)&p_iconstring, PV_NONE,
+ #else
+--- 1478,1484 ----
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"iconstring", NULL, P_STRING|P_VI_DEF|P_MLE,
+ #ifdef FEAT_TITLE
+ (char_u *)&p_iconstring, PV_NONE,
+ #else
+***************
+*** 1549,1555 ****
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"includeexpr", "inex", P_STRING|P_ALLOCED|P_VI_DEF,
+ #if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
+ (char_u *)&p_inex, PV_INEX,
+ {(char_u *)"", (char_u *)0L}
+--- 1550,1556 ----
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"includeexpr", "inex", P_STRING|P_ALLOCED|P_VI_DEF|P_MLE,
+ #if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
+ (char_u *)&p_inex, PV_INEX,
+ {(char_u *)"", (char_u *)0L}
+***************
+*** 1561,1567 ****
+ {"incsearch", "is", P_BOOL|P_VI_DEF|P_VIM,
+ (char_u *)&p_is, PV_NONE,
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"indentexpr", "inde", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
+ #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
+ (char_u *)&p_inde, PV_INDE,
+ {(char_u *)"", (char_u *)0L}
+--- 1562,1568 ----
+ {"incsearch", "is", P_BOOL|P_VI_DEF|P_VIM,
+ (char_u *)&p_is, PV_NONE,
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"indentexpr", "inde", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM|P_MLE,
+ #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
+ (char_u *)&p_inde, PV_INDE,
+ {(char_u *)"", (char_u *)0L}
+***************
+*** 1888,1893 ****
+--- 1889,1897 ----
+ {"modeline", "ml", P_BOOL|P_VIM,
+ (char_u *)&p_ml, PV_ML,
+ {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
++ {"modelineexpr", "mle", P_BOOL|P_VI_DEF,
++ (char_u *)&p_mle, PV_NONE,
++ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+ {"modelines", "mls", P_NUM|P_VI_DEF,
+ (char_u *)&p_mls, PV_NONE,
+ {(char_u *)5L, (char_u *)0L} SCTX_INIT},
+***************
+*** 2311,2317 ****
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"rulerformat", "ruf", P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_ruf, PV_NONE,
+ #else
+--- 2315,2321 ----
+ (char_u *)NULL, PV_NONE,
+ #endif
+ {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
+! {"rulerformat", "ruf", P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT|P_MLE,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_ruf, PV_NONE,
+ #else
+***************
+*** 2577,2583 ****
+ {"startofline", "sol", P_BOOL|P_VI_DEF|P_VIM,
+ (char_u *)&p_sol, PV_NONE,
+ {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
+! {"statusline" ,"stl", P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_stl, PV_STL,
+ #else
+--- 2581,2587 ----
+ {"startofline", "sol", P_BOOL|P_VI_DEF|P_VIM,
+ (char_u *)&p_sol, PV_NONE,
+ {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
+! {"statusline" ,"stl", P_STRING|P_VI_DEF|P_ALLOCED|P_RSTAT|P_MLE,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_stl, PV_STL,
+ #else
+***************
+*** 2624,2630 ****
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"tabline", "tal", P_STRING|P_VI_DEF|P_RALL,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_tal, PV_NONE,
+ #else
+--- 2628,2634 ----
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"tabline", "tal", P_STRING|P_VI_DEF|P_RALL|P_MLE,
+ #ifdef FEAT_STL_OPT
+ (char_u *)&p_tal, PV_NONE,
+ #else
+***************
+*** 2802,2808 ****
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"titlestring", NULL, P_STRING|P_VI_DEF,
+ #ifdef FEAT_TITLE
+ (char_u *)&p_titlestring, PV_NONE,
+ #else
+--- 2806,2812 ----
+ {(char_u *)0L, (char_u *)0L}
+ #endif
+ SCTX_INIT},
+! {"titlestring", NULL, P_STRING|P_VI_DEF|P_MLE,
+ #ifdef FEAT_TITLE
+ (char_u *)&p_titlestring, PV_NONE,
+ #else
+***************
+*** 4549,4554 ****
+--- 4553,4563 ----
+ errmsg = _("E520: Not allowed in a modeline");
+ goto skip;
+ }
++ if ((flags & P_MLE) && !p_mle)
++ {
++ errmsg = _("E992: Not allowed in a modeline when 'modelineexpr' is off");
++ goto skip;
++ }
+ #ifdef FEAT_DIFF
+ /* In diff mode some options are overruled. This avoids that
+ * 'foldmethod' becomes "marker" instead of "diff" and that
+*** ../vim-8.1.1365/src/option.h 2019-05-04 21:08:17.119814244 +0200
+--- src/option.h 2019-05-23 13:24:39.458971246 +0200
+***************
+*** 631,636 ****
+--- 631,637 ----
+ #ifdef FEAT_SPELL
+ EXTERN char_u *p_msm; /* 'mkspellmem' */
+ #endif
++ EXTERN long p_mle; /* 'modelineexpr' */
+ EXTERN long p_mls; /* 'modelines' */
+ EXTERN char_u *p_mouse; /* 'mouse' */
+ #ifdef FEAT_GUI
+*** ../vim-8.1.1365/src/testdir/test_modeline.vim 2018-11-25 05:06:34.943951024 +0100
+--- src/testdir/test_modeline.vim 2019-05-23 15:19:35.239334528 +0200
+***************
+*** 60,73 ****
+ set keymap= iminsert=0 imsearch=-1
+ endfunc
+
+! func s:modeline_fails(what, text)
+ let fname = "Xmodeline_fails_" . a:what
+ call writefile(['vim: set ' . a:text . ' :', 'nothing'], fname)
+ let modeline = &modeline
+ set modeline
+ filetype plugin on
+ syntax enable
+! call assert_fails('split ' . fname, 'E474:')
+ call assert_equal("", &filetype)
+ call assert_equal("", &syntax)
+
+--- 60,76 ----
+ set keymap= iminsert=0 imsearch=-1
+ endfunc
+
+! func s:modeline_fails(what, text, error)
+! if !exists('+' .. a:what)
+! return
+! endif
+ let fname = "Xmodeline_fails_" . a:what
+ call writefile(['vim: set ' . a:text . ' :', 'nothing'], fname)
+ let modeline = &modeline
+ set modeline
+ filetype plugin on
+ syntax enable
+! call assert_fails('split ' . fname, a:error)
+ call assert_equal("", &filetype)
+ call assert_equal("", &syntax)
+
+***************
+*** 79,94 ****
+ endfunc
+
+ func Test_modeline_filetype_fails()
+! call s:modeline_fails('filetype', 'ft=evil$CMD')
+ endfunc
+
+ func Test_modeline_syntax_fails()
+! call s:modeline_fails('syntax', 'syn=evil$CMD')
+ endfunc
+
+ func Test_modeline_keymap_fails()
+! if !has('keymap')
+! return
+! endif
+! call s:modeline_fails('keymap', 'keymap=evil$CMD')
+ endfunc
+--- 82,171 ----
+ endfunc
+
+ func Test_modeline_filetype_fails()
+! call s:modeline_fails('filetype', 'ft=evil$CMD', 'E474:')
+ endfunc
+
+ func Test_modeline_syntax_fails()
+! call s:modeline_fails('syntax', 'syn=evil$CMD', 'E474:')
+ endfunc
+
+ func Test_modeline_keymap_fails()
+! call s:modeline_fails('keymap', 'keymap=evil$CMD', 'E474:')
+! endfunc
+!
+! func Test_modeline_fails_always()
+! call s:modeline_fails('backupdir', 'backupdir=Something()', 'E520:')
+! call s:modeline_fails('cdpath', 'cdpath=Something()', 'E520:')
+! call s:modeline_fails('charconvert', 'charconvert=Something()', 'E520:')
+! call s:modeline_fails('completefunc', 'completefunc=Something()', 'E520:')
+! call s:modeline_fails('cscopeprg', 'cscopeprg=Something()', 'E520:')
+! call s:modeline_fails('diffexpr', 'diffexpr=Something()', 'E520:')
+! call s:modeline_fails('directory', 'directory=Something()', 'E520:')
+! call s:modeline_fails('equalprg', 'equalprg=Something()', 'E520:')
+! call s:modeline_fails('errorfile', 'errorfile=Something()', 'E520:')
+! call s:modeline_fails('exrc', 'exrc=Something()', 'E520:')
+! call s:modeline_fails('formatprg', 'formatprg=Something()', 'E520:')
+! call s:modeline_fails('fsync', 'fsync=Something()', 'E520:')
+! call s:modeline_fails('grepprg', 'grepprg=Something()', 'E520:')
+! call s:modeline_fails('helpfile', 'helpfile=Something()', 'E520:')
+! call s:modeline_fails('imactivatefunc', 'imactivatefunc=Something()', 'E520:')
+! call s:modeline_fails('imstatusfunc', 'imstatusfunc=Something()', 'E520:')
+! call s:modeline_fails('imstyle', 'imstyle=Something()', 'E520:')
+! call s:modeline_fails('keywordprg', 'keywordprg=Something()', 'E520:')
+! call s:modeline_fails('langmap', 'langmap=Something()', 'E520:')
+! call s:modeline_fails('luadll', 'luadll=Something()', 'E520:')
+! call s:modeline_fails('makeef', 'makeef=Something()', 'E520:')
+! call s:modeline_fails('makeprg', 'makeprg=Something()', 'E520:')
+! call s:modeline_fails('makespellmem', 'makespellmem=Something()', 'E520:')
+! call s:modeline_fails('mzschemedll', 'mzschemedll=Something()', 'E520:')
+! call s:modeline_fails('mzschemegcdll', 'mzschemegcdll=Something()', 'E520:')
+! call s:modeline_fails('omnifunc', 'omnifunc=Something()', 'E520:')
+! call s:modeline_fails('operatorfunc', 'operatorfunc=Something()', 'E520:')
+! call s:modeline_fails('perldll', 'perldll=Something()', 'E520:')
+! call s:modeline_fails('printdevice', 'printdevice=Something()', 'E520:')
+! call s:modeline_fails('patchexpr', 'patchexpr=Something()', 'E520:')
+! call s:modeline_fails('printexpr', 'printexpr=Something()', 'E520:')
+! call s:modeline_fails('pythondll', 'pythondll=Something()', 'E520:')
+! call s:modeline_fails('pythonhome', 'pythondll=Something()', 'E520:')
+! call s:modeline_fails('pythonthreedll', 'pythonthreedll=Something()', 'E520:')
+! call s:modeline_fails('pythonthreehome', 'pythonthreehome=Something()', 'E520:')
+! call s:modeline_fails('pyxversion', 'pyxversion=Something()', 'E520:')
+! call s:modeline_fails('rubydll', 'rubydll=Something()', 'E520:')
+! call s:modeline_fails('runtimepath', 'runtimepath=Something()', 'E520:')
+! call s:modeline_fails('secure', 'secure=Something()', 'E520:')
+! call s:modeline_fails('shell', 'shell=Something()', 'E520:')
+! call s:modeline_fails('shellcmdflag', 'shellcmdflag=Something()', 'E520:')
+! call s:modeline_fails('shellpipe', 'shellpipe=Something()', 'E520:')
+! call s:modeline_fails('shellquote', 'shellquote=Something()', 'E520:')
+! call s:modeline_fails('shellredir', 'shellredir=Something()', 'E520:')
+! call s:modeline_fails('shellxquote', 'shellxquote=Something()', 'E520:')
+! call s:modeline_fails('spellfile', 'spellfile=Something()', 'E520:')
+! call s:modeline_fails('spellsuggest', 'spellsuggest=Something()', 'E520:')
+! call s:modeline_fails('tcldll', 'tcldll=Something()', 'E520:')
+! call s:modeline_fails('titleold', 'titleold=Something()', 'E520:')
+! call s:modeline_fails('viewdir', 'viewdir=Something()', 'E520:')
+! call s:modeline_fails('viminfo', 'viminfo=Something()', 'E520:')
+! call s:modeline_fails('viminfofile', 'viminfofile=Something()', 'E520:')
+! call s:modeline_fails('winptydll', 'winptydll=Something()', 'E520:')
+! call s:modeline_fails('undodir', 'undodir=Something()', 'E520:')
+! " only check a few terminal options
+! call s:modeline_fails('t_AB', 't_AB=Something()', 'E520:')
+! call s:modeline_fails('t_ce', 't_ce=Something()', 'E520:')
+! call s:modeline_fails('t_sr', 't_sr=Something()', 'E520:')
+! call s:modeline_fails('t_8b', 't_8b=Something()', 'E520:')
+! endfunc
+!
+! func Test_modeline_fails_modelineexpr()
+! call s:modeline_fails('balloonexpr', 'balloonexpr=Something()', 'E992:')
+! call s:modeline_fails('foldexpr', 'foldexpr=Something()', 'E992:')
+! call s:modeline_fails('foldtext', 'foldtext=Something()', 'E992:')
+! call s:modeline_fails('formatexpr', 'formatexpr=Something()', 'E992:')
+! call s:modeline_fails('guitablabel', 'guitablabel=Something()', 'E992:')
+! call s:modeline_fails('iconstring', 'iconstring=Something()', 'E992:')
+! call s:modeline_fails('includeexpr', 'includeexpr=Something()', 'E992:')
+! call s:modeline_fails('indentexpr', 'indentexpr=Something()', 'E992:')
+! call s:modeline_fails('rulerformat', 'rulerformat=Something()', 'E992:')
+! call s:modeline_fails('statusline', 'statusline=Something()', 'E992:')
+! call s:modeline_fails('tabline', 'tabline=Something()', 'E992:')
+! call s:modeline_fails('titlestring', 'titlestring=Something()', 'E992:')
+ endfunc
+*** ../vim-8.1.1365/src/testdir/test49.in 2016-10-12 16:31:16.000000000 +0200
+--- src/testdir/test49.in 2019-05-23 15:22:31.330449346 +0200
+***************
+*** 5,11 ****
+
+ STARTTEST
+ :so small.vim
+! :se nocp nomore viminfo+=nviminfo
+ :lang mess C
+ :so test49.vim
+ :" Go back to this file and append the results from register r.
+--- 5,11 ----
+
+ STARTTEST
+ :so small.vim
+! :se nocp nomore viminfo+=nviminfo modelineexpr
+ :lang mess C
+ :so test49.vim
+ :" Go back to this file and append the results from register r.
+*** ../vim-8.1.1365/src/version.c 2019-05-22 22:38:21.660405578 +0200
+--- src/version.c 2019-05-23 15:20:33.079046674 +0200
+***************
+*** 769,770 ****
+--- 769,772 ----
+ { /* Add new patch number below this line */
++ /**/
++ 1366,
+ /**/
+
+--
+hundred-and-one symptoms of being an internet addict:
+18. Your wife drapes a blond wig over your monitor to remind you of what she
+ looks like.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///