[INFO] fetching crate anyerror 0.1.4...
[INFO] testing anyerror-0.1.4 against 1.59.0 for beta-1.60-1
[INFO] extracting crate anyerror 0.1.4 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate anyerror 0.1.4 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-57/source/rust-toolchain
[INFO] started tweaking crates.io crate anyerror 0.1.4
[INFO] finished tweaking crates.io crate anyerror 0.1.4
[INFO] tweaked toml for crates.io crate anyerror 0.1.4 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b48be2cd74eceda92b70ca58c04b47e51ccad05dbeda46f423e06a71d5aa1811
[INFO] running `Command { std: "docker" "start" "-a" "b48be2cd74eceda92b70ca58c04b47e51ccad05dbeda46f423e06a71d5aa1811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b48be2cd74eceda92b70ca58c04b47e51ccad05dbeda46f423e06a71d5aa1811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b48be2cd74eceda92b70ca58c04b47e51ccad05dbeda46f423e06a71d5aa1811", kill_on_drop: false }`
[INFO] [stdout] b48be2cd74eceda92b70ca58c04b47e51ccad05dbeda46f423e06a71d5aa1811
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98a2b409bd575271af00fdf34ad3a310893b895fda621583ce9ec5fe10e4c4be
[INFO] running `Command { std: "docker" "start" "-a" "98a2b409bd575271af00fdf34ad3a310893b895fda621583ce9ec5fe10e4c4be", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling gimli v0.26.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling object v0.27.1
[INFO] [stderr]    Compiling backtrace v0.3.64
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling anyerror v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(backtrace)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `anyerror` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "98a2b409bd575271af00fdf34ad3a310893b895fda621583ce9ec5fe10e4c4be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98a2b409bd575271af00fdf34ad3a310893b895fda621583ce9ec5fe10e4c4be", kill_on_drop: false }`
[INFO] [stdout] 98a2b409bd575271af00fdf34ad3a310893b895fda621583ce9ec5fe10e4c4be