From b35e4f8b3f15f0474d08f63e1f479787e261f485 Mon Sep 17 00:00:00 2001
From: Karl Williamson <public@khwilliamson.com>
Date: Sat, 14 Dec 2013 19:48:00 -0700
Subject: [PATCH] Fix HP-UX $! failure

HP-UX strerror() returns an empty string for an unknown error code.
This caused an assertion to fail under DEBUGGING builds.  This patch
removes the assertion and changes the return into  a non-empty string
indicating the errno is for an unknown error.
---
 mg.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mg.c b/mg.c
index d296cbc..45a8ac1 100644
--- a/mg.c
+++ b/mg.c
@@ -748,7 +748,11 @@ S_fixup_errno_string(pTHX_ SV* sv)
     PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING;
 
     assert(SvOK(sv));
-    assert(strNE(SvPVX(sv), ""));
+
+    if(strEQ(SvPVX(sv), "")) {
+	sv_catpv(sv, UNKNOWN_ERRNO_MSG);
+    }
+    else {
 
     /* In some locales the error string may come back as UTF-8, in
      * which case we should turn on that flag.  This didn't use to
@@ -768,6 +772,7 @@ S_fixup_errno_string(pTHX_ SV* sv)
     {
         SvUTF8_on(sv);
     }
+    }
 }
 
 #ifdef VMS
-- 
2.7.4