gitk: Fix a bug in make_disporder
The make_disporder function has an optimization where it assumed that
if displayorder was already long enough and the first entry in it for
a particular arc was non-null, then the whole arc was present. This
turns out not to be true in some circumstances, since we can add a
commit to an arc (which truncates displayorder to the previous end of
that arc), then call make_disporder for later arcs (which will pad
displayorder with null elements), then call make_disporder for the
first arc - which won't update the null elements.
This fixes it by changing the optimization to check the last element
for the arc instead of the first.
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/gitk b/gitk
index 97d1be0..8699e1b 100755
--- a/gitk
+++ b/gitk
@@ -853,7 +853,7 @@
lappend displayorder $id
lappend parentlist $parents($curview,$id)
}
- } elseif {[lindex $displayorder $r] eq {}} {
+ } elseif {[lindex $displayorder [expr {$r + $al - 1}]] eq {}} {
set i $r
foreach id $varccommits($curview,$a) {
lset displayorder $i $id
