From: Nicholas Clark <nick@ccl4.org>
Date: Fri, 9 Sep 2011 16:15:00 +0000 (+0200)
Subject: When probing strxfrm, consider a consistent return value of 0 as sane
X-Git-Tag: v5.15.3~175
X-Git-Url: https://perl5.git.perl.org/perl5.git/commitdiff_plain/e0601d3cce2506893b3816f3ef18eaeff16f5062

When probing strxfrm, consider a consistent return value of 0 as sane
---

diff --git a/locale.c b/locale.c
index 5893212..81c09ab 100644
--- a/locale.c
+++ b/locale.c
@@ -231,7 +231,7 @@ Perl_new_collate(pTHX_ const char *newcoll)
 	  const Size_t fa = strxfrm(xbuf, "a",  XFRMBUFSIZE);
 	  const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
 	  const SSize_t mult = fb - fa;
-	  if (mult < 1)
+	  if (mult < 1 && !(fa == 0 && fb == 0))
 	      Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
 			 (UV) fa, (UV) fb);
 	  PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;