[INFO] fetching crate serde_fmt 1.0.3...
[INFO] testing serde_fmt-1.0.3 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate serde_fmt 1.0.3 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate serde_fmt 1.0.3
[INFO] finished tweaking crates.io crate serde_fmt 1.0.3
[INFO] tweaked toml for crates.io crate serde_fmt 1.0.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_fmt 1.0.3 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 7 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c52aa25f9a799f278308b40f34dcb108d72022e4f1f5e931170fcf29359dae3b
[INFO] running `Command { std: "docker" "start" "-a" "c52aa25f9a799f278308b40f34dcb108d72022e4f1f5e931170fcf29359dae3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c52aa25f9a799f278308b40f34dcb108d72022e4f1f5e931170fcf29359dae3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c52aa25f9a799f278308b40f34dcb108d72022e4f1f5e931170fcf29359dae3b", kill_on_drop: false }`
[INFO] [stdout] c52aa25f9a799f278308b40f34dcb108d72022e4f1f5e931170fcf29359dae3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5488ec1736abfcb6a47c034a8e35a05a5ac79161e763988404f48f1264e1913f
[INFO] running `Command { std: "docker" "start" "-a" "5488ec1736abfcb6a47c034a8e35a05a5ac79161e763988404f48f1264e1913f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.57s
[INFO] running `Command { std: "docker" "inspect" "5488ec1736abfcb6a47c034a8e35a05a5ac79161e763988404f48f1264e1913f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5488ec1736abfcb6a47c034a8e35a05a5ac79161e763988404f48f1264e1913f", kill_on_drop: false }`
[INFO] [stdout] 5488ec1736abfcb6a47c034a8e35a05a5ac79161e763988404f48f1264e1913f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d2151ea8216e7f775e01441d24745cf15779281d5abec7e5907ee7293fbbe4d
[INFO] running `Command { std: "docker" "start" "-a" "5d2151ea8216e7f775e01441d24745cf15779281d5abec7e5907ee7293fbbe4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:511:21
[INFO] [stdout]     |
[INFO] [stdout] 511 |     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stdout]     |                     ^                           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 511 -     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stdout] 511 +     fn check_fmt(v: impl fmt::Debug + Serialize) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.70s
[INFO] running `Command { std: "docker" "inspect" "5d2151ea8216e7f775e01441d24745cf15779281d5abec7e5907ee7293fbbe4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d2151ea8216e7f775e01441d24745cf15779281d5abec7e5907ee7293fbbe4d", kill_on_drop: false }`
[INFO] [stdout] 5d2151ea8216e7f775e01441d24745cf15779281d5abec7e5907ee7293fbbe4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8bd1f64a3b51e97a6d35b3ef7ee0c0fa5cf2b4b1d8d4aa73187cc9b53e8ed063
[INFO] running `Command { std: "docker" "start" "-a" "8bd1f64a3b51e97a6d35b3ef7ee0c0fa5cf2b4b1d8d4aa73187cc9b53e8ed063", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:511:21
[INFO] [stderr]     |
[INFO] [stderr] 511 |     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stderr]     |                     ^                           ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 511 -     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stderr] 511 +     fn check_fmt(v: impl fmt::Debug + Serialize) {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `serde_fmt` (lib test) generated 1 warning (run `cargo fix --lib -p serde_fmt --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_fmt-40454729e5ac10e4)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::result_fmt_is_consistent ... ok
[INFO] [stdout] test tests::struct_fmt_is_consitent ... ok
[INFO] [stdout] test tests::option_fmt_is_consistent ... ok
[INFO] [stdout] test tests::fmt_flags_are_consistent ... ok
[INFO] [stdout] test tests::tagged_fmt_is_consistent ... ok
[INFO] [stdout] test tests::tuple_fmt_is_consistent ... ok
[INFO] [stdout] test tests::failing_serialize_does_not_panic_to_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde_fmt
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.17s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8bd1f64a3b51e97a6d35b3ef7ee0c0fa5cf2b4b1d8d4aa73187cc9b53e8ed063", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bd1f64a3b51e97a6d35b3ef7ee0c0fa5cf2b4b1d8d4aa73187cc9b53e8ed063", kill_on_drop: false }`
[INFO] [stdout] 8bd1f64a3b51e97a6d35b3ef7ee0c0fa5cf2b4b1d8d4aa73187cc9b53e8ed063