[Potential bug] hg qfold folds pending modifications

[Derek Yang]

Dear hg creators,

I am seeing a weird behavior in hg qfold.

In summary, when I use hg qfold to fold a patch 2.patch into the current top
patch 1.patch, hg folds everything from 2.patch into 1.patch (this is
correct).  But the issue that i am seeing is,  if there are any pending
modifications in my working directory, hg will also folds them into
1.patch.  This is not what I expect.

Some steps to reproduce this issue:

hg init
echo 'version 1' > file
hg add
hg qnew -m "version 1" -f 1.patch

echo 'version 2' >> file
hg qnew -m "version 2" -f 2.patch

hg qpop
hg qtop
// 1.patch is the top applied patch

echo 'version 3' >> file

hg qfold 2.patch

cat file
// version1
// version2
*// version3*

What I expect to see is:

cat file
// version1
// version2

Is this a real issue or this is by design? Is there any thing that I
misunderstand? :)

Thanks,

Derek
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