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-rw-r--r--mesalib/src/glsl/glcpp/glcpp-parse.y7
1 files changed, 6 insertions, 1 deletions
diff --git a/mesalib/src/glsl/glcpp/glcpp-parse.y b/mesalib/src/glsl/glcpp/glcpp-parse.y
index aa5a0c4f2..1f6e67fa0 100644
--- a/mesalib/src/glsl/glcpp/glcpp-parse.y
+++ b/mesalib/src/glsl/glcpp/glcpp-parse.y
@@ -388,7 +388,12 @@ expression:
$$ = $1 + $3;
}
| expression '%' expression {
- $$ = $1 % $3;
+ if ($3 == 0) {
+ yyerror (& @1, parser,
+ "zero modulus in preprocessor directive");
+ } else {
+ $$ = $1 % $3;
+ }
}
| expression '/' expression {
if ($3 == 0) {