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<?php $mypi = 3.1415926535897932384626433832795028841971; $pi = pi(); printf("pi: %.24f, %.24f, %.24f\n", $pi, $mypi, M_PI);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant " M_PI" in /in/i0kA4:4 Stack trace: #0 {main} thrown in /in/i0kA4 on line 4
Process exited with code 255.

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