gitk: Fixed broken exception handling in diff

If the tree diff command failed to start for some
random reason, treepending remained set, and thus
no more diffs were shown after that.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/gitk b/gitk
index d7fea265f3e48a32c11c208749d59f86a8f5bdda..abb6542c5f3b39c9f86cf0cfd4d26860d3de2d75 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -6457,9 +6457,10 @@ proc diffcmd {ids flags} {
 proc gettreediffs {ids} {
     global treediff treepending
 
+    if {[catch {set gdtf [open [diffcmd $ids {--no-commit-id}] r]}]} return
+
     set treepending $ids
     set treediff {}
-    if {[catch {set gdtf [open [diffcmd $ids {--no-commit-id}] r]}]} return
     fconfigure $gdtf -blocking 0
     filerun $gdtf [list gettreediffline $gdtf $ids]
 }