bug fix: witnessTable's subTypeDeclRef should have default substitution for getSpecailizedMangledName to work properly.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/slang/lower-to-ir.cpp b/source/slang/lower-to-ir.cpp
index 53cb2e772..b99e2713f 100644
--- a/source/slang/lower-to-ir.cpp
+++ b/source/slang/lower-to-ir.cpp
@@ -2870,6 +2870,7 @@ struct DeclLoweringVisitor : DeclVisitor<DeclLoweringVisitor, LoweredValInfo>
         if (parentDecl->ParentDecl)
             witnessTable->genericDecl = dynamic_cast<GenericDecl*>(parentDecl->ParentDecl);
         witnessTable->subTypeDeclRef = makeDeclRef(parentDecl);
+        witnessTable->subTypeDeclRef.substitutions = createDefaultSubstitutions(context->getSession(), parentDecl);
         witnessTable->supTypeDeclRef = inheritanceDecl->base.type->AsDeclRefType()->declRef;
 
         // Register the value now, rather than later, to avoid