[[!comment format=mdwn
 username="joey"
 subject="""comment 4"""
 date="2018-11-12T15:52:44Z"
 content="""
I don't see anything in [[!commit 6ecd55a9fa4c64399b5ede3944bd2aa5f78cf0b1]]
that could cause a STM deadlock; it uses a TVar and never retries.
"""]]
