[INFO] fetching crate coppers 0.1.1...
[INFO] testing coppers-0.1.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate coppers 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate coppers 0.1.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coppers 0.1.1
[INFO] finished tweaking crates.io crate coppers 0.1.1
[INFO] tweaked toml for crates.io crate coppers 0.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-ffi v0.16.6
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.16.6
[INFO] [stderr]   Downloaded pyo3-macros v0.16.6
[INFO] [stderr]   Downloaded pyo3-build-config v0.16.6
[INFO] [stderr]   Downloaded pyo3 v0.16.6
[INFO] [stderr]   Downloaded libgit2-sys v0.13.5+1.4.5
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7b99706488406de7f1410d0eef8fe33ee7ebb04ab2e838a73c5f081607f83cb
[INFO] running `Command { std: "docker" "start" "-a" "a7b99706488406de7f1410d0eef8fe33ee7ebb04ab2e838a73c5f081607f83cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7b99706488406de7f1410d0eef8fe33ee7ebb04ab2e838a73c5f081607f83cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7b99706488406de7f1410d0eef8fe33ee7ebb04ab2e838a73c5f081607f83cb", kill_on_drop: false }`
[INFO] [stdout] a7b99706488406de7f1410d0eef8fe33ee7ebb04ab2e838a73c5f081607f83cb
[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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7d87397365386b8275a0354f1974c359ebe22badb62dc6e9f02ce5466d6ccfc
[INFO] running `Command { std: "docker" "start" "-a" "e7d87397365386b8275a0354f1974c359ebe22badb62dc6e9f02ce5466d6ccfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-bidi v0.3.14
[INFO] [stderr]    Compiling jobserver v0.1.27
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling url v2.5.0
[INFO] [stderr]    Compiling openssl-sys v0.9.98
[INFO] [stderr]    Compiling libz-sys v1.1.12
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling libgit2-sys v0.13.5+1.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling git2 v0.14.4
[INFO] [stderr]    Compiling coppers v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(test)]
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(internal_output_capture)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coppers` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e7d87397365386b8275a0354f1974c359ebe22badb62dc6e9f02ce5466d6ccfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7d87397365386b8275a0354f1974c359ebe22badb62dc6e9f02ce5466d6ccfc", kill_on_drop: false }`
[INFO] [stdout] e7d87397365386b8275a0354f1974c359ebe22badb62dc6e9f02ce5466d6ccfc
