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-rw-r--r--cmdline/apt-get.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index 06dbbce5b..93c21651f 100644
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -350,6 +350,9 @@ bool DoMarkAuto(CommandLine &CmdL)
/* Intelligent upgrader that will install and remove packages at will */
bool DoDistUpgrade(CommandLine &CmdL)
{
+ if (CmdL.FileSize() != 1)
+ return _error->Error(_("The dist-upgrade command takes no arguments"));
+
CacheFile Cache;
if (Cache.OpenForInstall() == false || Cache.CheckDeps() == false)
return false;