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-rw-r--r--llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp b/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
index 403c02b4268..e52c88a5bfb 100644
--- a/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
+++ b/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
@@ -63,6 +63,7 @@ std::unique_ptr<MappedBlockStream>
MappedBlockStream::createIndexedStream(const MSFLayout &Layout,
const ReadableStream &MsfData,
uint32_t StreamIndex) {
+ assert(StreamIndex < Layout.StreamMap.size() && "Invalid stream index");
MSFStreamLayout SL;
SL.Blocks = Layout.StreamMap[StreamIndex];
SL.Length = Layout.StreamSizes[StreamIndex];
@@ -334,6 +335,7 @@ std::unique_ptr<WritableMappedBlockStream>
WritableMappedBlockStream::createIndexedStream(const MSFLayout &Layout,
const WritableStream &MsfData,
uint32_t StreamIndex) {
+ assert(StreamIndex < Layout.StreamMap.size() && "Invalid stream index");
MSFStreamLayout SL;
SL.Blocks = Layout.StreamMap[StreamIndex];
SL.Length = Layout.StreamSizes[StreamIndex];
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