julia-debug.exe segfaults during spawn test ever since #9266

[tkelman]

cc @vtjnash see logs, and bisect results from win32 and win64 here: https://gist.github.com/tkelman/7e6aa9bf14d382ba5b65
(skips were build failures)

[tkelman]

Works fine without sys.dll, so maybe not too big an issue. Does make #10045 harder to debug locally.

[vtjnash]

that seems to be a non-sequitur. the debug build is supposed to ignore sys.dll, since loading it would cause errors. although, i do keep seeing warnings that seem to result from it having gotten loaded?

[ihnorton]

oops...

[tkelman]

Thanks for the fix here @ihnorton. I'm guessing it would look a fair bit different on release-0.3. It might be okay as a wontfix there though, since I highly doubt we'll be shipping sys.dll with any 0.3 release.