Ryan Prichard 61004f88d1 Improve -Z unstable-options diagnostics and avoid an ICE ...

* Consumers of handle_options assume the unstable options are defined in
   the getopts::Matches value if -Z unstable-options is set, but that's not
   the case if there weren't any actual unstable options. Fix this by
   always reparsing options when -Z unstable-options is set.

 * If both argument parsing attempts fail, print the error from the second
   attempt rather than the first. The error from the first is very poor
   whenever unstable options are present. e.g.:

       $ rustc hello.rs -Z unstable-options --show-span
       error: Unrecognized option: 'show-span'.
       $ rustc hello.rs -Z unstable-options --pretty --pretty
       error: Unrecognized option: 'pretty'.
       $ rustc hello.rs -Z unstable-options --pretty --bad-option
       error: Unrecognized option: 'pretty'.

 * On the second parse, add a separate pass to reject unstable options if
   -Z unstable-options wasn't specified.

Fixes #21715.
r? @pnkfelix

2015-03-11 01:42:00 -07:00

..

driver.rs

Rollup merge of #23090 - alexcrichton:dep-info, r=pnkfelix

2015-03-06 09:02:08 +05:30

lib.rs

Improve -Z unstable-options diagnostics and avoid an ICE

2015-03-11 01:42:00 -07:00

pretty.rs

std: Deprecate std::old_io::fs

2015-03-04 15:59:30 -08:00

test.rs

Use consts instead of statics where appropriate

2015-03-02 17:11:51 +01:00