Re: packaging rust

On Mon, 8 Sep 2025, ASSI via Cygwin-apps wrote:

> Running on 4 out of 16 (or 32 on the other machine) threads sucks, but
> at least one of the builds eventually finished and got tested:
>
> --8<---------------cut here---------------start------------->8---
> failures:
>     [ui] tests/ui/abi/abi-sysv64-arg-passing.rs
>     [ui] tests/ui/abi/variadic-ffi.rs
>     [ui] tests/ui/associated-consts/issue-93775.rs#next
>     [ui] tests/ui/attributes/used_with_archive.rs
>     [ui] tests/ui/deprecation/deprecated_no_stack_check.rs
>     [ui] tests/ui/errors/pic-linker.rs
>     [ui] tests/ui/feature-gates/feature-gate-coverage-attribute.rs
>     [ui] tests/ui/feature-gates/feature-gate-raw-dylib-elf.rs
>     [ui] tests/ui/feature-gates/gated-bad-feature.rs
>     [ui] tests/ui/feature-gates/removed-features-note-version-and-pr-issue-141619.rs
>     [ui] tests/ui/intrinsics/intrinsic-alignment.rs
>     [ui] tests/ui/issues/issue-72933-match-stack-overflow.rs
>     [ui] tests/ui/issues/issue-74564-if-expr-stack-overflow.rs
>     [ui] tests/ui/linkage-attr/linkage1.rs
>     [ui] tests/ui/linkage-attr/raw-dylib/windows/raw-dylib-windows-only.rs#elf
>     [ui] tests/ui/linking/executable-no-mangle-strip.rs
>     [ui] tests/ui/lto/weak-works.rs
>     [ui] tests/ui/macros/macro-reexport-removed.rs
>     [ui] tests/ui/parser/survive-peano-lesson-queue.rs
>     [ui] tests/ui/pattern/usefulness/issue-88747.rs
>     [ui] tests/ui/proc-macro/custom-attr-only-one-derive.rs
>     [ui] tests/ui/proc-macro/meta-macro-hygiene.rs
>     [ui] tests/ui/proc-macro/meta-macro.rs
>     [ui] tests/ui/process/env-funky-keys.rs
>     [ui] tests/ui/runtime/out-of-stack.rs
>     [ui] tests/ui/rustdoc/renamed-features-rustdoc_internals.rs
>     [ui] tests/ui/structs-enums/rec-align-u64.rs
>     [ui] tests/ui/traits/const-traits/const-trait-impl-parameter-mismatch.rs
>     [ui] tests/ui/unsized-locals/yote.rs
>     [ui] tests/ui/unwind-no-uwtable.rs
>
> test result: FAILED. 19003 passed; 30 failed; 267 ignored; 0 measured; 0 filtered out; finished in 1009.82s
> --8<---------------cut here---------------end--------------->8---

Yep.  Those are the "ui" test suite.  There are other test suites too, but
it doesn't seem to run them once the "ui" tests fail.  I haven't yet done
any research to see if there's a way to get it to run all tests even if
they fail, nor have I looked at the individual failures (some of them are
almost certainly already skipped/ignored on Windows and need to be
similarly handled on Cygwin).  I was pretty satisfied with my one-liner
patch that brought the failures down from 3900+.  At this point I don't
think the compiler is "supported" on Cygwin yet, just the standard
library.