Merge pull request #644 from WalterBright/fix11301

fix Issue 11301 - [2.064 beta] core.sys.linux.sys.mman triggers enum res...
Merge pull request #647 from WalterBright/fix11344

fix Issue 11344 - Error: object.destroy called with argument types matches both
Merge remote-tracking branch 'upstream/2.064' into ldc-merge-2.064