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-rw-r--r--Documentation/git-rebase.txt27
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diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 50ba2e469f..be23ad2359 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -310,6 +310,11 @@ link:howto/revert-a-faulty-merge.txt[revert-a-faulty-merge How-To] for details).
-p::
--preserve-merges::
Instead of ignoring merges, try to recreate them.
++
+This uses the `--interactive` machinery internally, but combining it
+with the `--interactive` option explicitly is generally not a good
+idea unless you know what you are doing (see BUGS below).
+
--root::
Rebase all commits reachable from <branch>, instead of
@@ -611,6 +616,28 @@ The ripple effect of a "hard case" recovery is especially bad:
case" recovery too!
+BUGS
+----
+The todo list presented by `--preserve-merges --interactive` does not
+represent the topology of the revision graph. Editing commits and
+rewording their commit messages should work fine, but attempts to
+reorder commits tend to produce counterintuitive results.
+
+For example, an attempt to rearrange
+------------
+1 --- 2 --- 3 --- 4 --- 5
+------------
+to
+------------
+1 --- 2 --- 4 --- 3 --- 5
+------------
+by moving the "pick 4" line will result in the following history:
+------------
+ 3
+ /
+1 --- 2 --- 4 --- 5
+------------
+
Authors
------
Written by Junio C Hamano <gitster@pobox.com> and