From 54be2b4d759c9e40c5b564726f882470bbac4387 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Fri, 1 Jun 2018 18:36:28 +0200
Subject: [PATCH] self: Show backtraces on more columns.

* guix/self.scm (compiled-modules): Add "COLUMNS" to #:env-vars.
---
 guix/self.scm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/guix/self.scm b/guix/self.scm
index 9ff949075d..3503fbda43 100644
--- a/guix/self.scm
+++ b/guix/self.scm
@@ -588,7 +588,11 @@ list of file-name/file-like objects suitable as inputs to 'imported-files'."
                  `(#:local-build? #f              ;allow substitutes
 
                    ;; Don't annoy people about _IONBF deprecation.
-                   #:env-vars (("GUILE_WARN_DEPRECATED" . "no")))))
+                   ;; Initialize 'terminal-width' in (system repl debug)
+                   ;; to a large-enough value to make backtrace more
+                   ;; verbose.
+                   #:env-vars (("GUILE_WARN_DEPRECATED" . "no")
+                               ("COLUMNS" . "200")))))
 
 
 ;;;