reflection doesn't work for fixed length strs

[eholk]

The problem seems to be with the signature of visit_estr_fixed in intrinsic.rs.

See https://gist.github.com/3125194 for a backtrace showing what goes wrong.

[graydon]

Can I get the testcase that's triggering this?

[eholk]

There is now a test case in https://github.com/mozilla/rust/blob/incoming/src/test/run-pass/issue-2930.rs

[graydon]

Fixed by d809336.