Check for errors in system calls #222
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Problem
When
Vimuxfails because it tried to do something that's incompatible with the current tmux version, it fails mysteriously. This is because we don't check whether the system calls to tmux succeeded.Solution
Check system calls by checking
v:shell_error. The variable has been around since at least vim version 7.0001.I've also documented the
VimuxDebugoption in the help page.