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-rw-r--r--git-gui/lib/commit.tcl13
1 files changed, 12 insertions, 1 deletions
diff --git a/git-gui/lib/commit.tcl b/git-gui/lib/commit.tcl
index f9791f6..e139f4d 100644
--- a/git-gui/lib/commit.tcl
+++ b/git-gui/lib/commit.tcl
@@ -260,7 +260,18 @@ proc commit_committree {fd_wt curHEAD msg} {
# -- 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.