macos: don't test -no_uuid in CI

[ChrisDenton]

See the conversation below.

[bjorn3]

I wonder if -no_uuid is simply not allowed on arm64 macOS at all. arm64 macOS requires all binaries to be signed (even if ad-hoc signed), and I wouldn't be surprised if signing needs LC_UUID to be present.

[bjorn3]

At the very least Apple discourages using -no_uuid: https://developer.apple.com/documentation/technotes/tn3178-checking-for-and-resolving-build-uuid-problems

[ChrisDenton]

Maybe we should just remove this test entirely? Although CI does seem to be passing now (though it did before so maybe that doesn't mean much).

[philipc]

I tried running this manually and get a failure still:

SY177-I:backtrace-rs user943047$ RUSTFLAGS="-C link-arg=-Wl,-no_uuid" cargo test --target $(rustc --print host-tuple)
    Updating crates.io index
  Downloaded libloading v0.8.9
  Downloaded adler2 v2.0.0
  Downloaded gimli v0.32.0
  Downloaded addr2line v0.25.0
  Downloaded libc v0.2.175
  Downloaded 5 crates (1.1MiB) in 0.21s
   Compiling object v0.39.1
   Compiling libc v0.2.175
   Compiling adler2 v2.0.0
   Compiling memchr v2.7.6
   Compiling cfg-if v1.0.0
   Compiling gimli v0.32.0
   Compiling rustc-demangle v0.1.27
   Compiling dylib-dep v0.1.0 (/Volumes/Macintosh_HD/Users/user943047/backtrace-rs/crates/dylib-dep)
   Compiling libloading v0.8.9
   Compiling miniz_oxide v0.8.9
   Compiling addr2line v0.25.0
   Compiling backtrace v0.3.76 (/Volumes/Macintosh_HD/Users/user943047/backtrace-rs)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 6.12s
     Running unittests src/lib.rs (target/aarch64-apple-darwin/debug/deps/backtrace-f4ac8c740ef2adea)
dyld[94154]: missing LC_UUID load command in /Volumes/Macintosh_HD/Users/user943047/backtrace-rs/target/aarch64-apple-darwin/debug/deps/backtrace-f4ac8c740ef2adea
dyld[94154]: missing LC_UUID load command
error: test failed, to rerun pass `--lib`

Caused by:
  process didn't exit successfully: `/Volumes/Macintosh_HD/Users/user943047/backtrace-rs/target/aarch64-apple-darwin/debug/deps/backtrace-f4ac8c740ef2adea` (signal: 6, SIGABRT: process abort signal)
SY177-I:backtrace-rs user943047$ uname -a
Darwin SY177-I 25.3.0 Darwin Kernel Version 25.3.0: Wed Jan 28 20:54:22 PST 2026; root:xnu-12377.81.4~5/RELEASE_ARM64_T8112 arm64

Running without the --target failed on the libc build script:

  process didn't exit successfully: `/Volumes/Macintosh_HD/Users/user943047/backtrace-rs/target/debug/build/libc-68bec437b01ef978/build-script-build` (signal: 6, SIGABRT: process abort signal)

[ChrisDenton]

Weird that it's inconsistent in CI. But I feel convinced that testing something apple doesn't support doesn't make much sense so I'll change this PR.