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-rw-r--r--clang/lib/CodeGen/CodeGenModule.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index c59dc71da59..7b2599d664a 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4289,7 +4289,11 @@ void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) {
}
void CodeGenModule::EmitDeferredUnusedCoverageMappings() {
- for (const auto &Entry : DeferredEmptyCoverageMappingDecls) {
+ // We call takeVector() here to avoid use-after-free.
+ // FIXME: DeferredEmptyCoverageMappingDecls is getting mutated because
+ // we deserialize function bodies to emit coverage info for them, and that
+ // deserializes more declarations. How should we handle that case?
+ for (const auto &Entry : DeferredEmptyCoverageMappingDecls.takeVector()) {
if (!Entry.second)
continue;
const Decl *D = Entry.first;
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