---
src/glsl/ast_to_hir.cpp | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index ab62599..92391a0 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -762,8 +762,15 @@ do_assignment(exec_list *instructions, struct
_mesa_glsl_parse_state *state,
}
ir_variable *lhs_var = lhs->variable_referenced();
- if (lhs_var)
+ if (lhs_var) {
+ if (lhs_var->data.image_read_only) {
+ _mesa_glsl_error(&lhs_loc, state,
+ "assignment to read-only variable `%s'",
+ lhs_var->name);
+ error_emitted = true;
+ }
lhs_var->data.assigned = true;
+ }
if (!error_emitted) {
if (non_lvalue_description != NULL) {
--
1.9.1
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