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git-gui: avoid exception upon Ctrl+T in an empty list

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Previously unstaged files can be staged by clicking on them and then
pressing Ctrl+T. Conveniently, the next unstaged file is selected
automatically so that the unstaged files can be staged by repeatedly
pressing Ctrl+T.

When a user hits Ctrl+T one time too many, though, Git GUI used to throw
this exception:

	expected number but got ""
	expected number but got ""
	    while executing
	"expr {int([lindex [$w tag ranges in_diff] 0])}"
	    (procedure "toggle_or_diff" line 13)
	    invoked from within
	"toggle_or_diff toggle .vpane.files.workdir.list "
	    (command bound to event)

Let's just avoid that by skipping the operation when there are no more
files to stage.

This fixes https://github.com/git-for-windows/git/issues/1060

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2018-01-09 15:32:58 +01:00
committed by Junio C Hamano
parent 6d02c1e204
commit 2365e5b174
1 changed files with 4 additions and 0 deletions
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4
git-gui.sh
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@ -2505,6 +2505,10 @@ proc toggle_or_diff {mode w args} {
if {$last_clicked ne {}} {
set lno [lindex $last_clicked 1]
} else {
if {[llength $file_lists($w)] == 0} {
set last_clicked {}
return
}
set lno [expr {int([lindex [$w tag ranges in_diff] 0])}]
}
if {$mode eq "toggle"} {