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-rw-r--r--llvm/lib/Bitcode/Reader/BitstreamReader.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Bitcode/Reader/BitstreamReader.cpp b/llvm/lib/Bitcode/Reader/BitstreamReader.cpp
index 5e3232e5313..9d5fab9147a 100644
--- a/llvm/lib/Bitcode/Reader/BitstreamReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitstreamReader.cpp
@@ -170,8 +170,12 @@ unsigned BitstreamCursor::readRecord(unsigned AbbrevID,
unsigned Code;
if (CodeOp.isLiteral())
Code = CodeOp.getLiteralValue();
- else
+ else {
+ if (CodeOp.getEncoding() == BitCodeAbbrevOp::Array ||
+ CodeOp.getEncoding() == BitCodeAbbrevOp::Blob)
+ report_fatal_error("Abbreviation starts with an Array or a Blob");
Code = readAbbreviatedField(*this, CodeOp);
+ }
for (unsigned i = 1, e = Abbv->getNumOperandInfos(); i != e; ++i) {
const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i);
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