cache_tests::stable_hash test fails on s390x

[alexanderkjall]

Output:

---- cache_tests::stable_hash stdout ----
thread 'cache_tests::stable_hash' panicked at 'assertion failed: `(left == right)`
  left: `"038D651019410545"`,
 right: `"7D208C81E8236995"`', src/lib.rs:869:9
stack backtrace:
   0: rust_begin_unwind
             at /usr/src/rustc-1.63.0/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /usr/src/rustc-1.63.0/library/core/src/panicking.rs:142:14
   2: core::panicking::assert_failed_inner
   3: core::panicking::assert_failed
             at /usr/src/rustc-1.63.0/library/core/src/panicking.rs:181:5
   4: bkt::cache_tests::stable_hash
             at ./src/lib.rs:869:9
   5: bkt::cache_tests::stable_hash::{{closure}}
             at ./src/lib.rs:868:5
   6: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.63.0/library/core/src/ops/function.rs:248:5
   7: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.63.0/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

This looks like it might be a big/small endian problem.

Build log: https://ci.debian.net/data/autopkgtest/testing/s390x/r/rust-bkt/34502277/log.gz

[dimo414]

Thanks for the report, this test is mostly just a change-detector so it's probably simplest to disable it for this architecture (unless the errors you're seeing are non-deterministic which would be a bigger problem). Would you like to send a PR to disable this test?