Merge branch 'PHP-7.1'

Zend/configure.ac

@@ -68,7 +68,7 @@ int zend_sprintf(char *buffer, const char *format, ...);
 #elif defined(HAVE_FPCLASS)
 #define zend_isnan(a) ((fpclass(a) == FP_SNAN) || (fpclass(a) == FP_QNAN))
 #else
-#define zend_isnan(a) 0
+#define zend_isnan(a) ((a) != (a))
 #endif
 #endif
 

Zend/tests/bug73954.phpt

@@ -0,0 +1,23 @@
+--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(NAN);
+
+?>
+--EXPECTF--
+float(NAN)
+bool(true)
+
+Fatal error: Uncaught TypeError: Argument 1 passed to takes_int() must be of the type integer, float given, called in %s on line 9 and defined in %s:6
+Stack trace:
+#0 %s(9): takes_int(NAN)
+#1 {main}
+  thrown in %s on line 6

configure.ac

@@ -73,7 +73,7 @@ int zend_sprintf(char *buffer, const char *format, ...);
 #elif defined(HAVE_FPCLASS)
 #define zend_isnan(a) ((fpclass(a) == FP_SNAN) || (fpclass(a) == FP_QNAN))
 #else
-#define zend_isnan(a) 0
+#define zend_isnan(a) ((a) != (a))
 #endif
 #endif