Calling Regexp#match from ObjC in a background thread hangs

[tjw@…]

Calling this from a foreground thread works fine, but if I call Regexp#match from ObjC in a background thread, it hangs. Attaching example.

[tjw@…]

Xcode project demonstrating the problem.

[tjw@…]

Cc Me!

[lsansonetti@…]

The problem seems to be fixed in trunk as of r3858. This version of MacRuby features thread-safe regexps.

I had to change the sample code though to use performRubySelector: though. Calling some Ruby selectors that have negative arities (like #match) using the ObjC ABI does not work.

    id match = [regex performRubySelector:@selector(match:) withArguments: line, NULL];