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/* From section 5.5 "Vector Components" of the GLSL 1.20 spec:
*
* "When indexing with non-constant expressions, behavior is undefined if the
* index is negative, or greater than or equal to the size of the vector."
*
* The behaviour becomes defined only in robustness extensions, however even
* if driver is technically allowed to crash or hang, it most likely
* doesn't want to.
*/
[require]
GLSL >= 1.20
[vertex shader passthrough]
[fragment shader]
#version 120
void main()
{
vec4 vec = vec4(1.0, 2.0, 3.0, 4.0);
int index = 2147483647;
if (vec[index] >= 1.0) {
vec[index] = -1.0;
}
gl_FragColor = vec4(vec[index], 0.0, 0.0, 0.0);
}
[test]
draw rect -1 -1 2 2
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