On Tuesday, 14 November 2023 at 21:31:39 UTC, mw wrote:
handle SIGUSR1 noprint handle SIGUSR2 noprint
These are what the GC used to use to stop/start threads.
received signal SIG34, Real-time event 34. received signal SIG35, Real-time event 35.
And this is what it uses now.druntime just replaced usr1/2 with rt34/35 to lessen the likelyhood of conflicts with other libraries.