[Language Server]: Show signature help on generic parameters. (#7913)

* Show signature help on generic parameters.

* Fix.

* Update tests.

* slang-test: make vvl error go through stderr.

* update slang-rhi

* Update slang-rhi

1 files changed, 2 insertions, 1 deletions

diff --git a/source/slang/slang-check-overload.cpp b/source/slang/slang-check-overload.cpp
index 5a2b0872f..71e8488d8 100644
--- a/source/slang/slang-check-overload.cpp
+++ b/source/slang/slang-check-overload.cpp
@@ -1250,7 +1250,8 @@ Expr* SemanticsVisitor::CompleteOverloadCandidate(
             {
                 auto expr = m_astBuilder->create<PartiallyAppliedGenericExpr>();
                 expr->loc = context.loc;
-                expr->originalExpr = baseExpr;
+                expr->originalExpr = context.originalExpr;
+                expr->baseExpr = baseExpr;
                 expr->baseGenericDeclRef = as<DeclRefExpr>(baseExpr)->declRef.as<GenericDecl>();
                 auto args =
                     tryGetGenericArguments(candidate.subst, expr->baseGenericDeclRef.getDecl());