From 2e90b4cd9b8959c8a9cede0cb14ef5338ec93d49 Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nick@ccl4.org>
Date: Sun, 16 Apr 2006 12:06:57 +0000
Subject: [PATCH] In Perl_sv_usepvn_flags, assert() that the caller has RTFM.

p4raw-id: //depot/perl@27842
---
 sv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sv.c b/sv.c
index 247ab31..308ecf8 100644
--- a/sv.c
+++ b/sv.c
@@ -3920,6 +3920,9 @@ Perl_sv_usepvn_flags(pTHX_ SV *sv, char *ptr, STRLEN len, U32 flags)
     if (SvPVX_const(sv))
 	SvPV_free(sv);
 
+    if (flags & SV_HAS_TRAILING_NUL)
+	assert(ptr[len] == '\0');
+
     allocate = (flags & SV_HAS_TRAILING_NUL)
 	? len : PERL_STRLEN_ROUNDUP(len + 1);
 #ifdef DEBUGGING
-- 
2.7.4