From 4588525d7edbc0d14c41f5fa8f3e23a3241a502e Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Mon, 12 Feb 2024 14:05:58 +0900
Subject: CoverageMappingReader/Writer: MCDCConditionID shouldn't be zero

---
 llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp')

diff --git a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
index fc6014c..061f0f1 100644
--- a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
+++ b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
@@ -308,6 +308,10 @@ Error RawCoverageMappingReader::readMappingRegionsSubArray(
             return Err;
           if (auto Err = readIntMax(FID, std::numeric_limits<unsigned>::max()))
             return Err;
+          if (ID == 0)
+            return make_error<CoverageMapError>(
+                coveragemap_error::malformed,
+                "MCDCConditionID shouldn't be zero");
           break;
         case CounterMappingRegion::MCDCDecisionRegion:
           Kind = CounterMappingRegion::MCDCDecisionRegion;
-- 
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