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[BlockList] Fix a crash if block is empty #80734

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Merged
merged 1 commit into from
Apr 11, 2025
Merged

[BlockList] Fix a crash if block is empty #80734

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6 changes: 4 additions & 2 deletions lib/Basic/BlockList.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -115,8 +115,10 @@ void swift::BlockListStore::Implementation::addConfigureFilePath(StringRef path)
SM.getLLVMSourceMgr());
for (auto DI = Stream.begin(); DI != Stream.end(); ++ DI) {
assert(DI != Stream.end() && "Failed to read a document");
yaml::Node *N = DI->getRoot();
for (auto &pair: *dyn_cast<yaml::MappingNode>(N)) {
auto *MapNode = dyn_cast<yaml::MappingNode>(DI->getRoot());
if (!MapNode)
continue;
for (auto &pair: *MapNode) {
std::string key = getScalaString(pair.getKey());
auto action = llvm::StringSwitch<BlockListAction>(key)
#define BLOCKLIST_ACTION(X) .Case(#X, BlockListAction::X)
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