# -- Verify this wasn't an empty change.
#
if {$commit_type eq {normal}} {
- set old_tree [git rev-parse "$PARENT^{tree}"]
+ set fd_ot [open "| git cat-file commit $PARENT" r]
+ fconfigure $fd_ot -encoding binary -translation lf
+ set old_tree [gets $fd_ot]
+ close $fd_ot
+
+ if {[string equal -length 5 {tree } $old_tree]
+ && [string length $old_tree] == 45} {
+ set old_tree [string range $old_tree 5 end]
+ } else {
+ error "Commit $PARENT appears to be corrupt"
+ }
+
if {$tree_id eq $old_tree} {
info_popup {No changes to commit.