And one bug report: it is possible to crash the compiler by using delete instead of CloseHandle.
It is easily reproducible by changing line 1013 of the previously linked smjansson include to use delete and trying to compile the test plugin that comes with it. Sorry for not having a smaller and more specific testcase for this.
Thanks for such an excellent test of the new syntax! I extracted a minimal test case from your file and now it's fixed on master.