Commit 5831b68341

@@ -9098,6 +9098,8 @@ fn nodeMayNeedMemoryLocation(tree: *const Ast, start_node: Ast.Node.Index, have_
                     .always => return true,
                     .forward1 => node = node_datas[node].rhs,
                 }
+                // Missing builtin arg is not a parsing error, expect an error later.
+                if (node == 0) return false;
             },
 
             .builtin_call, .builtin_call_comma => {
@@ -9112,6 +9114,8 @@ fn nodeMayNeedMemoryLocation(tree: *const Ast, start_node: Ast.Node.Index, have_
                     .always => return true,
                     .forward1 => node = params[1],
                 }
+                // Missing builtin arg is not a parsing error, expect an error later.
+                if (node == 0) return false;
             },
         }
     }

@@ -0,0 +1,13 @@
+comptime {
+    const v = @as();
+}
+comptime {
+    const u = @bitCast(u32);
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :2:15: error: expected 2 arguments, found 0
+// :5:15: error: expected 2 arguments, found 1