From dac3388a4c344bddc080c0886a2ee13994307555 Mon Sep 17 00:00:00 2001
From: Michael van der Kamp <michael.vanderkamp@usask.ca>
Date: Sun, 19 Nov 2023 15:28:38 -0800
Subject: [PATCH] Throw error if system call fails

---
 plugin/vimux.vim | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/plugin/vimux.vim b/plugin/vimux.vim
index 51fcbf5..3f72ac1 100644
--- a/plugin/vimux.vim
+++ b/plugin/vimux.vim
@@ -197,7 +197,11 @@ function! VimuxTmux(arguments) abort
     echom l:tmuxCommand
   endif
   if has_key(environ(), 'TMUX')
-    return system(l:tmuxCommand)
+    let l:output = system(l:tmuxCommand)
+    if v:shell_error
+      throw 'Tmux command failed with message:' . l:output
+    endif
+    return l:output
   else
     throw 'Aborting, because not inside tmux session.'
   endif