Cannot build Moar/Windows releases from (roughly) 2020.07 onwards

[SqrtNegInf]

After fresh installs of git, Strawberry Perl and rakubrew, the command rakubrew build moar-blead fails (seeing this on both Win7 and Win10), croaking on 'debugserver.c'. This works:rakubrew build moar-2020.06, but this does not: rakubrew build moar-2020.07. Working backwards from the 2020.07 release, I found the last commit I could compile was 15fae6d from July 16th.

The errors are always the same, here's a representative compile log. Ignoring the printf noise, the crucial errors seem to have to do with threads, I wonder if it's related to these NQP changes?

20200717 p6d [09:55] <Geth_> ¦ nqp: 127803247 set debugserver's thread name
20200717 p6d [09:55] <Geth_> ¦ nqp: 707f6ce70 Debugserver Protocol 1.2: add thread "name" field
20200717 p6d [09:55] <Geth_> ¦ nqp: 1d52655e2 decode threadname with utf8-c8

Stuck at this point. Are there some other libraries I need to update first? Ultimately this may not really be a rakubrew issue, but wanted to check here first to make sure I'm not just being all thumbs with Windows...

• What's the output of rakubrew rakubrew-version?: rakubrew v9 Build type: win OS: MSWin32
• Are you using rakubrew in env or in shim mode? (run rakubrew mode to find out): shim
• Where is rakubrew installed? (run rakubrew home to find out):
  C:/rakubrew

[patrickbkr]

Thanks for reporting this! This looks like a bug in MoarVM itself. I have created a respective ticket linking to this one. I'm closing this one in favor of the other.