[dsymutil] Fix use-after-free when sys::path::append grows the buffer.

<rdar://problem/50117620>

llvm-svn: 359001

diff --git a/llvm/tools/dsymutil/dsymutil.cpp b/llvm/tools/dsymutil/dsymutil.cpp
index 32569846361d5400b2f793eabf2f84fc171d66b0..d14dff061d0d1e165ab463557eb3e4ae68bd6309 100644 (file)
--- a/llvm/tools/dsymutil/dsymutil.cpp
+++ b/llvm/tools/dsymutil/dsymutil.cpp
@@ -328,7 +328,7 @@ static Expected<OutputLocation> getOutputFileName(llvm::StringRef InputFile) {
     return std::move(E);
 
   llvm::sys::path::append(Path, "Contents", "Resources");
-  StringRef ResourceDir = Path;
+  std::string ResourceDir = Path;
   llvm::sys::path::append(Path, "DWARF", llvm::sys::path::filename(DwarfFile));
   return OutputLocation(Path.str(), ResourceDir.str());
 }