patches that delete can't be seen in patch queue (BB-1309)

It seems that patches with deleted files break. I made this repository to illustrate the problem: https://bitbucket.org/robsimmons/mqtest-patch/qseries

{{{
bash-3.2$ hg qclone https://bitbucket.org/robsimmons/mqtest-patch\\
no changes found
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
bash-3.2$ cd mqtest-patch/
bash-3.2$ hg qnew patch.add
bash-3.2$ cat > TEST
test
bash-3.2$ hg add TEST
bash-3.2$ hg qrefresh
bash-3.2$ hg qnew patch.del
bash-3.2$ hg rm TEST
bash-3.2$ hg qrefresh
bash-3.2$ hg qcommit -m "Add, then delete, TEST"
bash-3.2$ cd .hg/patches/
bash-3.2$ hg push
pushing to https://bitbucket.org/robsimmons/mqtest-patch/.hg/patches\\
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 3 changes to 3 files
remote: bb/acl: robsimmons is allowed. accepted payload.
bash-3.2$
}}}

I can view the first patch here: https://bitbucket.org/robsimmons/mqtest-patch/qseries?apply=t&qs_apply=patch.add, but the second patch can't be viewed because it includes a deleted file (I conjecture): https://bitbucket.org/robsimmons/mqtest-patch/qseries?apply=t&qs_apply=patch.del