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/* { dg-do compile } */
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/* { dg-options "-Wunused-value -Werror" } */
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int main (void) { 0; } /* { dg-error "no effect" } */
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/* { dg-message "warnings being treated as errors" "" { target *-*-* } 0 } */
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/* { dg-final { output-exists { target *-*-* } } } */
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