GHC 7.10.1 Win7 x86_64 crash when building reflex-dom-0.1.1
[ 4 of 11] Compiling Reflex.Dom.Internal ( src\Reflex\Dom\Internal.hs, dist\build\Reflex\Dom\Internal.o ) ghc.exe: internal error: checkProddableBlock: invalid fixup in runtime linker: 00000000184b3978 (GHC version 7.10.1 for x86_64_unknown_mingw32) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
This happens with unmodified reflex-dom.cabal (which specifies -funbox-strict-fields and -O2) and also with all ghc-options: flags removed and -O or -O0. When compiling with the bundled mingw it also pops up a GUI error window:
ghc.exe - Entry Point Not Found The procedure entry point pthread_cond_timedwait_relative_np could not be located in the dynamic link library libwinpthread-1.dll.
I also tried using a fully-updated mingw64 from MSYS2, which has solved -pthread issues for me in the past, but that simply crashes with no additional message.
Verbose cabal output attached.