Hitting RTS bug on GHC 8.0.2

Hi, I got the following crash in one of my CI tests ( https://travis-ci.org/composewell/streamly/jobs/448112763): test: internal error: RELEASE_LOCK: I do not own this lock: rts/Messages.c 54 (GHC version 8.0.2 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug I have hit this just once yet. Is this worth opening a ticket, given that this is an older version of the compiler? Has something like been fixed since then or might this be present in newer versions as well? -harendra