Regions GC: Can't use withRegion/withScratchRegion when using --os:standalone

[clj]

withRegion and withScratchRegion use try ... finally which does not work when using --os:standalone

Example

# --gc:regions --os:standalone
withScratchRegion:
  discard

Current Output

Error: system module needs: getFrame

Possible Solution

Use when defined(standalone): to define versions of withRegion and withScratchRegion that do not use try ... finally.

Additional Information

$ nim -v
Nim Compiler Version 1.0.2 [Linux: amd64]