unic-idna-mapping-0.4.0 beta regression

[est31]

unic-idna-mapping version 0.4.0 regressed from stable to beta (full log):

Aug 04 02:28:56.746 INFO kablam! error[E0560]: struct `__test::test::TestDesc` has no field named `allow_fail`
Aug 04 02:28:56.746 INFO kablam!   --> tests/unicode_version_tests.rs:17:1
Aug 04 02:28:56.746 INFO kablam!    |
Aug 04 02:28:56.746 INFO kablam! 17 | / fn test_version_against_ucd_core() {
Aug 04 02:28:56.746 INFO kablam! 18 | |     assert_eq!(
Aug 04 02:28:56.746 INFO kablam! 19 | |         unic_ucd_core::UNICODE_VERSION,
Aug 04 02:28:56.746 INFO kablam! 20 | |         unic_idna_mapping::UNICODE_VERSION
Aug 04 02:28:56.746 INFO kablam! 21 | |     );
Aug 04 02:28:56.746 INFO kablam! 22 | | }
Aug 04 02:28:56.746 INFO kablam!    | |_^ `__test::test::TestDesc` does not have this field

cc @behnam

[arielb1]

what?

[arielb1]

Looks like a dupe of #43684 - rustc_test is being used.

[arielb1]

https://github.com/behnam/rust-unic/blob/v0.4.0/components/idna/Cargo.toml indeed uses rustc-test 0.1.

[alexcrichton]

Closing in favor of #43684

[behnam]

Thanks, @est31, for the report. Yes, it is a known problem that we need to maintain rustc_test for the beta/nightly to pass. For UNIC specifically, we want to drop the dependency and use an approach that works also on stable, with some extra goodies. Here's the issue I filed: open-i18n/rust-unic#76