check if expr is null

src/check_expr.cpp

@@ -263,12 +263,14 @@ gb_internal void check_did_you_mean_scope(String const &name, Scope *scope, char
 
 gb_internal Entity *entity_from_expr(Ast *expr) {
 	expr = unparen_expr(expr);
+	if (expr != nullptr) {
 		switch (expr->kind) {
 			case Ast_Ident:
 				return expr->Ident.entity;
 			case Ast_SelectorExpr:
 				return entity_from_expr(expr->SelectorExpr.selector);
 		}
+	}
 	return nullptr;
 }