Merge branch 'PHP-7.1' into PHP-7.2

* PHP-7.1:
  Fixed bug #46781 (BC math handles minus zero incorrectly)

NEWS

@@ -8,6 +8,7 @@ PHP                                                                        NEWS
 
 - BCMath:
   . Fixed bug #44995 (bcpowmod() fails if scale != 0). (cmb)
+  . Fixed bug #46781 (BC math handles minus zero incorrectly). (cmb)
   . Fixed bug #54598 (bcpowmod() may return 1 if modulus is 1). (okano1220, cmb)
   . Fixed bug #75178 (bcpowmod() misbehaves for non-integer base or modulus). (cmb)
 

ext/bcmath/libbcmath/src/str2num.c

@@ -105,5 +105,8 @@ bc_str2num (bc_num *num, char *str, int scale)
       for (;strscale > 0; strscale--)
 	*nptr++ = CH_VAL(*ptr++);
     }
+
+  if (bc_is_zero (*num))
+    (*num)->n_sign = PLUS;
 }
 

ext/bcmath/tests/bug46781.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #46781 (BC math handles minus zero incorrectly)
+--SKIPIF--
+<?php
+if (!extension_loaded('bcmath')) die('skip bcmath extension is not available');
+?>
+--FILE--
+<?php
+var_dump(bcadd('-0.0', '-0.0', 1));
+var_dump(bccomp('-0.0', '0', 1));
+?>
+===DONE===
+--EXPECT--
+string(3) "0.0"
+int(0)
+===DONE===