git-gui: fix exception when trying to stage with empty file list

If there is nothing to stage, there is nothing to stage. Let's not try to, even if the file list contains nothing at all. This fixes #1075 Signed-off-by: Johannes Schindelin <[email protected]>
git-for-windows · Nov 29, 2017 · 5ef74eb · 5ef74eb
1 parent 4ab2825
commit 5ef74eb
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
@@ -2515,7 +2515,9 @@ proc toggle_or_diff {mode w args} {
 		if {$last_clicked ne {}} {
 			set lno [lindex $last_clicked 1]
 		} else {
-			if {[llength $file_lists($w)] == 0} {
+			if {![info exists file_lists]
+				|| ![info exists file_lists($w)]
+				|| [llength $file_lists($w)] == 0} {
 				set last_clicked {}
 				return
 			}
@@ -2529,7 +2531,13 @@ proc toggle_or_diff {mode w args} {
 		}
 	}
 
-	set path [lindex $file_lists($w) [expr {$lno - 1}]]
+	if {![info exists file_lists]
+		|| ![info exists file_lists($w)]
+		|| [llength $file_lists($w)] < $lno - 1} {
+		set path {}
+	} else {
+		set path [lindex $file_lists($w) [expr {$lno - 1}]]
+	}
 	if {$path eq {}} {
 		set last_clicked {}
 		return