On a 64-bit system, memory allocation is done in a single operation

Author: SakiTakamachi

ext/intl/grapheme/grapheme_string.c

@@ -1049,8 +1049,15 @@ PHP_FUNCTION(grapheme_levenshtein)
 	}
 
 	zend_long *p1, *p2, *tmp;
+#if SIZEOF_SIZE_T == 8
+	/* strlen_2 is an int32_t, so it will not overflow. */
+	zend_long *pbuf = safe_emalloc(((size_t) strlen_2 + 1) * 2, sizeof(zend_long), 0);
+	p1 = pbuf;
+	p2 = p1 + (strlen_2 + 1);
+#else
 	p1 = safe_emalloc(strlen_2 + 1, sizeof(zend_long), 0);
 	p2 = safe_emalloc(strlen_2 + 1, sizeof(zend_long), 0);
+#endif
 
 	for (i2 = 0; i2 <= strlen_2; i2++) {
 		p1[i2] = i2 * cost_ins;
@@ -1098,8 +1105,12 @@ PHP_FUNCTION(grapheme_levenshtein)
 	retval = p1[strlen_2];
 	RETVAL_LONG(retval);
 
+#if SIZEOF_SIZE_T == 8
+	efree(pbuf);
+#else
 	efree(p2);
 	efree(p1);
+#endif
 
 out_collator:
 	ucol_close(collator);