[INFO] fetching crate mt_logger 3.0.2...
[INFO] testing mt_logger-3.0.2 against beta-2026-01-20 for beta-1.94-1
[INFO] extracting crate mt_logger 3.0.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate mt_logger 3.0.2
[INFO] finished tweaking crates.io crate mt_logger 3.0.2
[INFO] tweaked toml for crates.io crate mt_logger 3.0.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mt_logger 3.0.2 on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a797c6f1c59f3e931e5085a1c38f05cc28412c6e19425cac767a5b2def4e4a07
[INFO] running `Command { std: "docker" "start" "-a" "a797c6f1c59f3e931e5085a1c38f05cc28412c6e19425cac767a5b2def4e4a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a797c6f1c59f3e931e5085a1c38f05cc28412c6e19425cac767a5b2def4e4a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a797c6f1c59f3e931e5085a1c38f05cc28412c6e19425cac767a5b2def4e4a07", kill_on_drop: false }`
[INFO] [stdout] a797c6f1c59f3e931e5085a1c38f05cc28412c6e19425cac767a5b2def4e4a07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 170e21dda5e3fcf2083415e9c97c76102608fa6c5f0456351e800a387b5d484e
[INFO] running `Command { std: "docker" "start" "-a" "170e21dda5e3fcf2083415e9c97c76102608fa6c5f0456351e800a387b5d484e", kill_on_drop: false }`
[INFO] [stderr]    Compiling chrono v0.4.43
[INFO] [stderr]    Compiling mt_logger v3.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.28s
[INFO] running `Command { std: "docker" "inspect" "170e21dda5e3fcf2083415e9c97c76102608fa6c5f0456351e800a387b5d484e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "170e21dda5e3fcf2083415e9c97c76102608fa6c5f0456351e800a387b5d484e", kill_on_drop: false }`
[INFO] [stdout] 170e21dda5e3fcf2083415e9c97c76102608fa6c5f0456351e800a387b5d484e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53666ce755fb2bde6b435d81517f0838fd6f7c1405726b4fc76b8b32ebd08225
[INFO] running `Command { std: "docker" "start" "-a" "53666ce755fb2bde6b435d81517f0838fd6f7c1405726b4fc76b8b32ebd08225", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]    Compiling mt_logger v3.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.47s
[INFO] running `Command { std: "docker" "inspect" "53666ce755fb2bde6b435d81517f0838fd6f7c1405726b4fc76b8b32ebd08225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53666ce755fb2bde6b435d81517f0838fd6f7c1405726b4fc76b8b32ebd08225", kill_on_drop: false }`
[INFO] [stdout] 53666ce755fb2bde6b435d81517f0838fd6f7c1405726b4fc76b8b32ebd08225
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2a7b2d92d5fbbe47a2ee71f29ca91a2140598365105933b79729af80731ef018
[INFO] running `Command { std: "docker" "start" "-a" "2a7b2d92d5fbbe47a2ee71f29ca91a2140598365105933b79729af80731ef018", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mt_logger-5f7a88bd45c80008)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::format_verification ... FAILED
[INFO] [stdout] test tests::outputstream_verification ... FAILED
[INFO] [stdout] test tests::flush_test ... FAILED
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::format_verification stdout ----
[INFO] [stdout] Flushing all messages to their output...
[INFO] [stdout] 2026-01-28T10:26:55.604563350: Entered LogReceiver thread.
[INFO] [stdout] 
[INFO] [stdout] thread 'log_receiver' (27) panicked at src/receiver.rs:122:27:
[INFO] [stdout] Failed to create logs directory. Error: Read-only file system (os error 30)
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5dc274b76b22 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5dc274b76b22 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5dc274b76b22 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5dc274b76b22 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5dc274b87cca - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5dc274b87cca - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x5dc274b45236 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5dc274b45236 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5dc274b55e29 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5dc274b55e29 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5dc274b55cc1 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5dc2748673ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5dc2748673ee - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5dc274b560a2 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5dc274b560a2 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5dc274b55ee8 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5dc274b51199 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5dc274b3883d - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5dc274b9011c - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5dc27482ec46 - mt_logger::receiver::Receiver::main::hc1eef885b4bd5a35
[INFO] [stdout]                                at /opt/rustwide/workdir/src/receiver.rs:122:27
[INFO] [stdout]   20:     0x5dc274829aad - mt_logger::MtLogger::new::{{closure}}::hef71de69054e7786
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib.rs:167:41
[INFO] [stdout]   21:     0x5dc27481c5d6 - std::sys::backtrace::__rust_begin_short_backtrace::h24ca8b89ab79de5c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   22:     0x5dc274822963 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h666f10ca3255732f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   23:     0x5dc274820430 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fe257cdd07beb53
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   24:     0x5dc274822a16 - std::panicking::catch_unwind::do_call::he270aab68e4b1afd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   25:     0x5dc2748261eb - __rust_try
[INFO] [stdout]   26:     0x5dc2748224c0 - std::panicking::catch_unwind::h0a93e1ae7aa6db9d
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   27:     0x5dc2748224c0 - std::panic::catch_unwind::h87c6f2ebd7c47be4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   28:     0x5dc2748224c0 - std::thread::lifecycle::spawn_unchecked::{{closure}}::h28bdd6aa24b08e1b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   29:     0x5dc274822dbe - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4ddd6f41d6c635b5
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   30:     0x5dc274b4c37f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   31:     0x5dc274b4c37f - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   32:     0x7f568e08faa4 - <unknown>
[INFO] [stdout]   33:     0x7f568e11ca64 - clone
[INFO] [stdout]   34:                0x0 - <unknown>
[INFO] [stdout] Error: RecvError(RecvError)
[INFO] [stdout] 
[INFO] [stdout] ---- tests::outputstream_verification stdout ----
[INFO] [stdout] Flushing all messages to their output...
[INFO] [stdout] Error: SendError(SendError { .. })
[INFO] [stdout] 
[INFO] [stdout] ---- tests::flush_test stdout ----
[INFO] [stdout] Initial message count: 0
[INFO] [stdout] Sending messages...
[INFO] [stdout] Error: SendError(SendError { .. })
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::flush_test
[INFO] [stdout]     tests::format_verification
[INFO] [stdout]     tests::outputstream_verification
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2a7b2d92d5fbbe47a2ee71f29ca91a2140598365105933b79729af80731ef018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a7b2d92d5fbbe47a2ee71f29ca91a2140598365105933b79729af80731ef018", kill_on_drop: false }`
[INFO] [stdout] 2a7b2d92d5fbbe47a2ee71f29ca91a2140598365105933b79729af80731ef018
