Special NAN handling

nikic · nikic · commit 9909de2e3647 · 2019-02-25T17:42:32.000+01:00
diff --git a/Zend/zend_operators.c b/Zend/zend_operators.c
@@ -2091,10 +2091,20 @@ ZEND_API int ZEND_FASTCALL compare_function(zval *result, zval *op1, zval *op2)
 				return SUCCESS;
 
 			case TYPE_PAIR(IS_DOUBLE, IS_STRING):
+				if (zend_isnan(Z_DVAL_P(op1))) {
+					ZVAL_LONG(result, 1);
+					return SUCCESS;
+				}
+
 				ZVAL_LONG(result, compare_double_to_string(Z_DVAL_P(op1), Z_STR_P(op2)));
 				return SUCCESS;
 
 			case TYPE_PAIR(IS_STRING, IS_DOUBLE):
+				if (zend_isnan(Z_DVAL_P(op2))) {
+					ZVAL_LONG(result, 1);
+					return SUCCESS;
+				}
+
 				ZVAL_LONG(result, -compare_double_to_string(Z_DVAL_P(op2), Z_STR_P(op1)));
 				return SUCCESS;
 
