[INFO] fetching crate error_mancer 0.4.3...
[INFO] testing error_mancer-0.4.3 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate error_mancer 0.4.3 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate error_mancer 0.4.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate error_mancer 0.4.3
[INFO] tweaked toml for crates.io crate error_mancer 0.4.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate error_mancer 0.4.3 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate error_mancer 0.4.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 016b284fc4868acc9d99b5f1883545646480fabd4119a8e1189f6b8056d1074d
[INFO] running `Command { std: "docker" "start" "-a" "016b284fc4868acc9d99b5f1883545646480fabd4119a8e1189f6b8056d1074d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "016b284fc4868acc9d99b5f1883545646480fabd4119a8e1189f6b8056d1074d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "016b284fc4868acc9d99b5f1883545646480fabd4119a8e1189f6b8056d1074d", kill_on_drop: false }`
[INFO] [stdout] 016b284fc4868acc9d99b5f1883545646480fabd4119a8e1189f6b8056d1074d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce0a3038c7ffb20f8c3b15d4f93bc0d24ee760145aebebed933a1087ccd3f8e9
[INFO] running `Command { std: "docker" "start" "-a" "ce0a3038c7ffb20f8c3b15d4f93bc0d24ee760145aebebed933a1087ccd3f8e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling error_mancer_macros v0.4.3
[INFO] [stderr]    Compiling error_mancer v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.64s
[INFO] running `Command { std: "docker" "inspect" "ce0a3038c7ffb20f8c3b15d4f93bc0d24ee760145aebebed933a1087ccd3f8e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce0a3038c7ffb20f8c3b15d4f93bc0d24ee760145aebebed933a1087ccd3f8e9", kill_on_drop: false }`
[INFO] [stdout] ce0a3038c7ffb20f8c3b15d4f93bc0d24ee760145aebebed933a1087ccd3f8e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c244982bc6f0a3c028ffd1f6d91fccc6088151ee9ba73249b8202bbf4b8446b
[INFO] running `Command { std: "docker" "start" "-a" "5c244982bc6f0a3c028ffd1f6d91fccc6088151ee9ba73249b8202bbf4b8446b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]    Compiling hashbrown v0.15.1
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling winnow v0.6.20
[INFO] [stderr]    Compiling target-triple v0.1.3
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling anyhow v1.0.93
[INFO] [stderr]    Compiling thiserror v2.0.3
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling tokio v1.43.0
[INFO] [stderr]    Compiling indexmap v2.6.0
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling toml_edit v0.22.22
[INFO] [stderr]    Compiling toml v0.8.19
[INFO] [stderr]    Compiling trybuild v1.0.101
[INFO] [stderr]    Compiling error_mancer v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `core::assert_matches`
[INFO] [stdout]  --> tests/flatten.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::assert_matches::assert_matches;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^ could not find `assert_matches` in `core`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `core::assert_matches`
[INFO] [stdout]  --> tests/basic.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::assert_matches::assert_matches;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^ could not find `assert_matches` in `core`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `assert_matches` has been stable since 1.95.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tests/flatten.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assert_matches)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `assert_matches` has been stable since 1.95.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tests/basic.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(assert_matches)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Err1` is never constructed
[INFO] [stdout]  --> tests/derive.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Err1;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bar` is never used
[INFO] [stdout]   --> tests/derive.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn bar() {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bar` is never constructed
[INFO] [stdout]   --> tests/derive.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Bar;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Err1` is never constructed
[INFO] [stdout]  --> tests/name.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Err1;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `error_mancer` (test "flatten") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `error_mancer` (test "basic") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "5c244982bc6f0a3c028ffd1f6d91fccc6088151ee9ba73249b8202bbf4b8446b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c244982bc6f0a3c028ffd1f6d91fccc6088151ee9ba73249b8202bbf4b8446b", kill_on_drop: false }`
[INFO] [stdout] 5c244982bc6f0a3c028ffd1f6d91fccc6088151ee9ba73249b8202bbf4b8446b