-
Allow to unregister threadWaitReadSTM/threadWaitWriteSTM on a non-threaded runtime. Previosly noop action was returned, as a result it was not possible to unregister action, unless data arrives to Fd or it's closed. Fixes #12852. Reviewers: simonmar, hvr, austin, bgamari, trofi Reviewed By: bgamari, trofi Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2729 GHC Trac Issues: #12852
f4302534