[INFO] fetching crate procr_ansi_term 0.2.2...
[INFO] testing procr_ansi_term-0.2.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate procr_ansi_term 0.2.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate procr_ansi_term 0.2.2
[INFO] finished tweaking crates.io crate procr_ansi_term 0.2.2
[INFO] tweaked toml for crates.io crate procr_ansi_term 0.2.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate procr_ansi_term 0.2.2 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 procr_ansi_term 0.2.2 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] [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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dfe24631c975af96fde16aec42c3c3cb6de83c8307dcc93058f685195fad0f9
[INFO] running `Command { std: "docker" "start" "-a" "4dfe24631c975af96fde16aec42c3c3cb6de83c8307dcc93058f685195fad0f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dfe24631c975af96fde16aec42c3c3cb6de83c8307dcc93058f685195fad0f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dfe24631c975af96fde16aec42c3c3cb6de83c8307dcc93058f685195fad0f9", kill_on_drop: false }`
[INFO] [stdout] 4dfe24631c975af96fde16aec42c3c3cb6de83c8307dcc93058f685195fad0f9
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f379f0091b18fd9460ec86efce74888e2b8b78a8a8fba8e61bc08cb48891fdd
[INFO] running `Command { std: "docker" "start" "-a" "4f379f0091b18fd9460ec86efce74888e2b8b78a8a8fba8e61bc08cb48891fdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling hashbrown v0.14.1
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling prettyplease v0.2.15
[INFO] [stderr]    Compiling smallvec v1.11.1
[INFO] [stderr]    Compiling regex-syntax v0.8.1
[INFO] [stderr]    Compiling thin-vec v0.2.12
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling unicode-properties v0.1.0
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/smallvec-1.11.1/src/lib.rs:96:37
[INFO] [stdout]    |
[INFO] [stdout] 96 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4f379f0091b18fd9460ec86efce74888e2b8b78a8a8fba8e61bc08cb48891fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f379f0091b18fd9460ec86efce74888e2b8b78a8a8fba8e61bc08cb48891fdd", kill_on_drop: false }`
[INFO] [stdout] 4f379f0091b18fd9460ec86efce74888e2b8b78a8a8fba8e61bc08cb48891fdd
