glsl2: Don't try to construct an ir_assignment with an invalid LHS

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index b65a323..14c5280 100644 (file)
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -555,9 +555,8 @@ do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state,
                                                  NULL));
    deref_var = new(ctx) ir_dereference_variable(var);
 
-   instructions->push_tail(new(ctx) ir_assignment(lhs,
-                                                 deref_var,
-                                                 NULL));
+   if (!error_emitted)
+      instructions->push_tail(new(ctx) ir_assignment(lhs, deref_var, NULL));
 
    return new(ctx) ir_dereference_variable(var);
 }