[INFO] fetching crate arena-container 0.0.2...
[INFO] checking arena-container-0.0.2 against 1.95.0 for pr-155915
[INFO] extracting crate arena-container 0.0.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate arena-container 0.0.2
[INFO] finished tweaking crates.io crate arena-container 0.0.2
[INFO] tweaked toml for crates.io crate arena-container 0.0.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate arena-container 0.0.2 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate arena-container 0.0.2 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded errno-no-std v0.2.2
[INFO] [stderr]   Downloaded print-no-std v0.3.0
[INFO] [stderr]   Downloaded iter-identify_first_last v0.2.3
[INFO] [stderr]   Downloaded quickcheck_macros v1.1.0
[INFO] [stderr]   Downloaded composable-allocators v0.3.5
[INFO] [stderr]   Downloaded exit-no-std v0.3.0
[INFO] [stderr]   Downloaded panicking v0.7.0
[INFO] [stderr]   Downloaded const-default v1.0.0
[INFO] [stderr]   Downloaded const-default-derive v0.2.0
[INFO] [stderr]   Downloaded pc-ints v0.4.0
[INFO] [stderr]   Downloaded dos-cp v0.8.0
[INFO] [stderr]   Downloaded quickcheck v1.0.3
[INFO] [stderr]   Downloaded errno-sys v0.2.0
[INFO] [stderr]   Downloaded sync-no-std v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5027f5e3c397158049675625ae7a3624e4e8f44de00979cde66f91b685f332fd
[INFO] running `Command { std: "docker" "start" "-a" "5027f5e3c397158049675625ae7a3624e4e8f44de00979cde66f91b685f332fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5027f5e3c397158049675625ae7a3624e4e8f44de00979cde66f91b685f332fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5027f5e3c397158049675625ae7a3624e4e8f44de00979cde66f91b685f332fd", kill_on_drop: false }`
[INFO] [stdout] 5027f5e3c397158049675625ae7a3624e4e8f44de00979cde66f91b685f332fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0fe178ea1d4a7e3e1acb8b676f190237e669b769611064734c53758b11c7773
[INFO] running `Command { std: "docker" "start" "-a" "e0fe178ea1d4a7e3e1acb8b676f190237e669b769611064734c53758b11c7773", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling cc v1.2.49
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]     Checking panicking v0.7.0
[INFO] [stderr]     Checking const-default v1.0.0
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling indexmap v2.12.1
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]    Compiling errno-sys v0.2.0
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking sync-no-std v0.1.5
[INFO] [stderr]     Checking errno-no-std v0.2.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/sync-no-std-0.1.5/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sync-no-std` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e0fe178ea1d4a7e3e1acb8b676f190237e669b769611064734c53758b11c7773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0fe178ea1d4a7e3e1acb8b676f190237e669b769611064734c53758b11c7773", kill_on_drop: false }`
[INFO] [stdout] e0fe178ea1d4a7e3e1acb8b676f190237e669b769611064734c53758b11c7773
