[INFO] fetching crate zuqe 0.5.0...
[INFO] testing zuqe-0.5.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate zuqe 0.5.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate zuqe 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate zuqe 0.5.0
[INFO] tweaked toml for crates.io crate zuqe 0.5.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zuqe 0.5.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zuqe 0.5.0 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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c4cbd96ed024cd8c0a41c8644ae8664684aa1345d1ca0052bbb1ce3e3c0bc09
[INFO] running `Command { std: "docker" "start" "-a" "4c4cbd96ed024cd8c0a41c8644ae8664684aa1345d1ca0052bbb1ce3e3c0bc09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c4cbd96ed024cd8c0a41c8644ae8664684aa1345d1ca0052bbb1ce3e3c0bc09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c4cbd96ed024cd8c0a41c8644ae8664684aa1345d1ca0052bbb1ce3e3c0bc09", kill_on_drop: false }`
[INFO] [stdout] 4c4cbd96ed024cd8c0a41c8644ae8664684aa1345d1ca0052bbb1ce3e3c0bc09
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40bf1051ea790c95d502bd12a6e4d3f6683e04ba0cdcfc198c8ce6f48a2f770a
[INFO] running `Command { std: "docker" "start" "-a" "40bf1051ea790c95d502bd12a6e4d3f6683e04ba0cdcfc198c8ce6f48a2f770a", kill_on_drop: false }`
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]    Compiling linux-raw-sys v0.4.15
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling cc v1.2.60
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling bindgen v0.68.1
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling gc-lite-macros v0.1.0
[INFO] [stderr]    Compiling gc-lite v0.4.2
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling fallible_collections v0.5.1
[INFO] [stderr]    Compiling zuqe v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `class_name` is never read
[INFO] [stdout]    --> build_stdclass.rs:179:5
[INFO] [stdout]     |
[INFO] [stdout] 178 | struct ClassInfo {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 179 |     class_name: &'static str,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ClassInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.25
[INFO] [stderr]    Compiling hash-link v0.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr] error: failed to run custom build command for `zuqe v0.5.0 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/zuqe-509f5427a3b82ed9/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   rustfmt failed: error: 'rustfmt' is not installed for the toolchain 'beta-2026-04-21-x86_64-unknown-linux-gnu'.
[INFO] [stderr]   help: run `rustup component add --toolchain beta-2026-04-21-x86_64-unknown-linux-gnu rustfmt` to install it
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "40bf1051ea790c95d502bd12a6e4d3f6683e04ba0cdcfc198c8ce6f48a2f770a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40bf1051ea790c95d502bd12a6e4d3f6683e04ba0cdcfc198c8ce6f48a2f770a", kill_on_drop: false }`
[INFO] [stdout] 40bf1051ea790c95d502bd12a6e4d3f6683e04ba0cdcfc198c8ce6f48a2f770a
