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--TEST--
Bug #73954 (NAN check fails on Alpine Linux with musl)
--FILE--
<?php
var_dump(NAN);
var_dump(is_nan(NAN));
function takes_int(int $int) {
}
takes_int(log(tan(3.14)));
?>
--EXPECTF--
float(NAN)
bool(true)
Fatal error: Uncaught TypeError: takes_int(): Argument #1 ($int) must be of type int, float given, called in %s:%d
Stack trace:
#0 %s(9): takes_int(NAN)
#1 {main}
thrown in %s on line 6
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