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-rw-r--r--source/slang/slang-check-decl.cpp7
1 files changed, 7 insertions, 0 deletions
diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index 781a3a237..8030bcf97 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -7861,6 +7861,13 @@ namespace Slang
if (semantics)
semantics->ensureDecl(genericTypeConstraintDecl, DeclCheckState::ReadyForReference);
auto constraintDeclRef = astBuilder->getDirectDeclRef<GenericTypeConstraintDecl>(genericTypeConstraintDecl);
+ auto supType = getSup(astBuilder, constraintDeclRef);
+ if (!supType)
+ {
+ args.add(astBuilder->getErrorType());
+ shouldCache = false;
+ continue;
+ }
auto witness =
astBuilder->getDeclaredSubtypeWitness(
getSub(astBuilder, constraintDeclRef),