diff --git a/glslang/MachineIndependent/iomapper.cpp b/glslang/MachineIndependent/iomapper.cpp
index 3262c0a203..4856422741 100644
--- a/glslang/MachineIndependent/iomapper.cpp
+++ b/glslang/MachineIndependent/iomapper.cpp
@@ -831,6 +831,7 @@ void TDefaultGlslIoResolver::reserverStorageSlot(TVarEntryInfo& ent, TInfoSink&
                 if (iter->second != location) {
                     TString errorMsg = "Invalid location: " + name;
                     infoSink.info.message(EPrefixInternalError, errorMsg.c_str());
+                    hasError = true;
                 }
             }
         }
@@ -856,6 +857,7 @@ void TDefaultGlslIoResolver::reserverStorageSlot(TVarEntryInfo& ent, TInfoSink&
                 if (iter->second != location) {
                     TString errorMsg = "Invalid location: " + name;
                     infoSink.info.message(EPrefixInternalError, errorMsg.c_str());
+                    hasError = true;
                 }
             }
         }
@@ -884,6 +886,7 @@ void TDefaultGlslIoResolver::reserverResourceSlot(TVarEntryInfo& ent, TInfoSink&
             if (iter->second != binding) {
                 TString errorMsg = "Invalid binding: " + name;
                 infoSink.info.message(EPrefixInternalError, errorMsg.c_str());
+                hasError = true;
             }
         }
     }
diff --git a/glslang/MachineIndependent/iomapper.h b/glslang/MachineIndependent/iomapper.h
index 684e88d571..933e259f2f 100644
--- a/glslang/MachineIndependent/iomapper.h
+++ b/glslang/MachineIndependent/iomapper.h
@@ -129,6 +129,7 @@ struct TDefaultIoResolverBase : public glslang::TIoMapResolver {
     uint32_t computeTypeLocationSize(const TType& type, EShLanguage stage);
 
     TSlotSetMap slots;
+    bool hasError = false;
 
 protected:
     TDefaultIoResolverBase(TDefaultIoResolverBase&);