rust-lld broken on latest x86_64-apple-darwin nightly

[phil-opp]

The bundled rust-lld linker seems to be broken on macOS on the latest nightly (2020-09-13). The following error occurs:

error: linking with `rust-lld` failed: signal: 6
  |
  = note: "rust-lld" "-flavor" "gnu" "--eh-frame-hdr" […]
  = note: dyld: Library not loaded: @rpath/libLLVM.dylib
            Referenced from: /Users/runner/work/x86_64/x86_64/testing/target/sysroot/lib/rustlib/x86_64-apple-darwin/bin/rust-lld
            Reason: image not found

It worked fine with yesterdays nightly (2020-09-12). The exact version numbers are listed below.

Judging from the diff between these two nightlies, this might be caused by #76349. cc @Mark-Simulacrum

Meta

Failed on:

rustc 1.48.0-nightly (7402a39 2020-09-13)
binary: rustc
commit-hash: 7402a39
commit-date: 2020-09-13
host: x86_64-apple-darwin
release: 1.48.0-nightly
LLVM version: 11.0
cargo 1.48.0-nightly (875e01232 2020-09-08)
release: 1.48.0
commit-hash: 875e0123259b0b6299903fe4aea0a12ecde9324f
commit-date: 2020-09-08

Worked on:

rustc 1.48.0-nightly (dbb73f8 2020-09-12)
binary: rustc
commit-hash: dbb73f8
commit-date: 2020-09-12
host: x86_64-apple-darwin
release: 1.48.0-nightly
LLVM version: 11.0
cargo 1.48.0-nightly (875e01232 2020-09-08)
release: 1.48.0
commit-hash: 875e0123259b0b6299903fe4aea0a12ecde9324f
commit-date: 2020-09-08

[Mark-Simulacrum]

I'm testing a possible fix in #76708.

[phil-opp]

Unfortunately I'm still getting the same rust-lld error on nightly 2020-09-16 (285fc7d):

error: linking with rust-lld failed: signal: 6
[…]
= note: dyld: Library not loaded: @rpath/libLLVM.dylib
Referenced from: /Users/runner/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/bin/rust-lld
Reason: image not found

[Mark-Simulacrum]

Yeah, it turned out that due to a bash bug the PR that landed didn't actually have any effect, I'm working on a better fix in #76810.

[berkus]

Hi, any news on this?

[Mark-Simulacrum]

The state as of 3 days ago (#76698 (comment)) reported in this thread is still accurate.

[brightzheng100]

I tried the nightly-2020-09-12 but this build doesn't exist so I switched to nightly-2020-09-11 and it worked.

Interestingly, while I retried it today, as of 23 Sept 2020 SGT, it also worked perfectly fine so I believe the latest nightly builds have fixed this issue.

[berkus]

Well well well, lets see.

Seems to work indeed!

[badkk]

I pretty much sure this bug turns back on nightly-2020-10-06

rustc 1.49.0-nightly (a1dfd2490 2020-10-05)
binary: rustc
commit-hash: a1dfd2490a6cb456b92e469fa550dc217e20ad6d
commit-date: 2020-10-05
host: x86_64-apple-darwin
release: 1.49.0-nightly
LLVM version: 11.0

[Mark-Simulacrum]

That nightly is pretty old, could you test with a more recent nightly and file a new issue if you can reproduce?