Merge pull request #3784 from WalterBright/fix9449

[critical] fix Issue 9449 - Static arrays of 128bit types segfault on initializatio...
Merge pull request #3775 from 9rnsr/fix13113

Issue 13113 - cannot build druntime's gc.d with -debug=INVARIANT, bad @nogc inference?
Merge pull request #3791 from AndrewEdwards/2.066

Cherry-picking commits from master to 2.066 branch (for beta5)