From f5a48a6ba25a4d96d1204e9a2ba9faf246a7de7c Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Sat, 24 Nov 2018 12:02:13 +0300
Subject: [PATCH] Fix sigsegv if two outputs specified

outname is only set up by pass two so
earlier access may lead to sigsegv.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---
 asm/nasm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/asm/nasm.c b/asm/nasm.c
index c7d5e3c6..25ac36c6 100644
--- a/asm/nasm.c
+++ b/asm/nasm.c
@@ -1743,7 +1743,9 @@ static void nasm_verror_gnu(int severity, const char *fmt, va_list ap)
     if (!(severity & ERR_NOFILE)) {
 	src_get(&lineno, &currentfile);
         if (!currentfile || (severity & ERR_TOPFILE)) {
-            currentfile = inname[0] ? inname : outname[0] ? outname : NULL;
+            currentfile = inname && inname[0] ?
+		    inname : outname && outname[0] ?
+		    outname : NULL;
             lineno = 0;
         }
     }