I was running `arc lint --apply-patches --everything` in rP and it eventually ran out of memory (my laptop has 8GB of RAM) and failed with:
```
Some linters failed:
- ArcanistXHPASTLinter: Exception: Failed to proc_open(): proc_open(): fork failed - Cannot allocate memory
- ArcanistPhutilXHPASTLinter: Exception: Failed to proc_open(): proc_open(): fork failed - Cannot allocate memory
```
This doesn't seem correct and I suspect that this is due to the way that the output is being rendered (since the output produced by `arc lint` seems to be buffered and output only once linting has completed).