diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -3016,6 +3016,12 @@ class localrepository(object):
                     self.ui.write(
                         _(b'note: commit message saved in %s\n') % msgfn
                     )
+                    self.ui.write(
+                        _(
+                            b"note: use 'hg commit --logfile "
+                            b".hg/last-message.txt --edit' to reuse it\n"
+                        )
+                    )
                 raise
 
         def commithook(unused_success):
diff --git a/tests/test-histedit-edit.t b/tests/test-histedit-edit.t
--- a/tests/test-histedit-edit.t
+++ b/tests/test-histedit-edit.t
@@ -373,6 +373,7 @@ check saving last-message.txt, at first
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt
@@ -397,6 +398,7 @@ action)
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
 
diff --git a/tests/test-mq-qfold.t b/tests/test-mq-qfold.t
--- a/tests/test-mq-qfold.t
+++ b/tests/test-mq-qfold.t
@@ -230,6 +230,7 @@ and that combination of '--edit' and '--
   HG: changed a
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
diff --git a/tests/test-mq-qnew.t b/tests/test-mq-qnew.t
--- a/tests/test-mq-qnew.t
+++ b/tests/test-mq-qnew.t
@@ -308,6 +308,7 @@ Test saving last-message.txt
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt
diff --git a/tests/test-mq-qrefresh-replace-log-message.t b/tests/test-mq-qrefresh-replace-log-message.t
--- a/tests/test-mq-qrefresh-replace-log-message.t
+++ b/tests/test-mq-qrefresh-replace-log-message.t
@@ -186,6 +186,7 @@ Test saving last-message.txt:
   HG: added file2
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
@@ -229,6 +230,7 @@ external process
   A file2
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
diff --git a/tests/test-rollback.t b/tests/test-rollback.t
--- a/tests/test-rollback.t
+++ b/tests/test-rollback.t
@@ -116,6 +116,7 @@ same thing, but run $EDITOR
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit hook exited with status * (glob)
   [255]
   $ cat .hg/last-message.txt
diff --git a/tests/test-tag.t b/tests/test-tag.t
--- a/tests/test-tag.t
+++ b/tests/test-tag.t
@@ -323,6 +323,7 @@ regardless of '--message')
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt