Fix language server crash on incomplete higher order invoke expr. (#2476)

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/source/slang/slang-check-expr.cpp b/source/slang/slang-check-expr.cpp
index c7d69262d..fe37f5099 100644
--- a/source/slang/slang-check-expr.cpp
+++ b/source/slang/slang-check-expr.cpp
@@ -1977,6 +1977,11 @@ namespace Slang
         
         // Check/Resolve inner function declaration.
         expr->baseFunction = CheckTerm(expr->baseFunction);
+
+        // For now we only support using higher order expr as callee in an invoke expr.
+        // The actual type of the higher order function will be derived during resolve invoke.
+        expr->type = m_astBuilder->getBottomType();
+
         return expr;
     }