|  | #version 310 es
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							|  | #extension GL_ARB_post_depth_coverage : enable
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							|  | precision highp float;
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							|  | layout(post_depth_coverage, location = 0) in float a;  // should fail since post_depth_coverage may only
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							|  |                                                        // be declared on in only (not with variable declarations)
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							|  | void main () {
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							|  | }
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