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-rw-r--r--apt-pkg/deb/deblistparser.cc15
1 files changed, 13 insertions, 2 deletions
diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index cf0a9a402..4e61f0fc2 100644
--- a/apt-pkg/deb/deblistparser.cc
+++ b/apt-pkg/deb/deblistparser.cc
@@ -72,8 +72,19 @@ string debListParser::Package() {
string Result = Section.Find(pkgTagSection::Key::Package).to_string();
// Normalize mixed case package names to lower case, like dpkg does
- // See Bug#807012 for details
- std::transform(Result.begin(), Result.end(), Result.begin(), tolower_ascii);
+ // See Bug#807012 for details.
+ // Only do this when the package name does not contain a / - as that
+ // indicates that the package name was derived from a filename given
+ // to install or build-dep or similar (Bug#854794)
+ if (likely(Result.find('/') == string::npos))
+ {
+ for (char &c: Result)
+ {
+ char l = tolower_ascii_inline(c);
+ if (unlikely(l != c))
+ c = l;
+ }
+ }
if(unlikely(Result.empty() == true))
_error->Error("Encountered a section with no Package: header");