[INFO] cloning repository https://github.com/chikaku/simple_calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chikaku/simple_calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchikaku%2Fsimple_calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchikaku%2Fsimple_calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 521cd4a36a55aa0b91cab080091c82c009784097
[INFO] testing chikaku/simple_calculator against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchikaku%2Fsimple_calculator" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chikaku/simple_calculator on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chikaku/simple_calculator
[INFO] finished tweaking git repo https://github.com/chikaku/simple_calculator
[INFO] tweaked toml for git repo https://github.com/chikaku/simple_calculator written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/chikaku/simple_calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af81d5c9a60e2a286974f320962aa75b3f44c6fe88a9d8d0d1bfee34d45066df
[INFO] running `Command { std: "docker" "start" "-a" "af81d5c9a60e2a286974f320962aa75b3f44c6fe88a9d8d0d1bfee34d45066df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af81d5c9a60e2a286974f320962aa75b3f44c6fe88a9d8d0d1bfee34d45066df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af81d5c9a60e2a286974f320962aa75b3f44c6fe88a9d8d0d1bfee34d45066df", kill_on_drop: false }`
[INFO] [stdout] af81d5c9a60e2a286974f320962aa75b3f44c6fe88a9d8d0d1bfee34d45066df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c633eaca0f76ba62ff4b9ebd4f0226e48828236143bb411ac9008edce3cae828
[INFO] running `Command { std: "docker" "start" "-a" "c633eaca0f76ba62ff4b9ebd4f0226e48828236143bb411ac9008edce3cae828", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling simple_calculator_deliver v0.1.1 (/opt/rustwide/workdir/deliver)
[INFO] [stderr]    Compiling simple_calculator_cmd 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_range_pattern)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(bool_to_option)]
[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 `simple_calculator_cmd` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "c633eaca0f76ba62ff4b9ebd4f0226e48828236143bb411ac9008edce3cae828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c633eaca0f76ba62ff4b9ebd4f0226e48828236143bb411ac9008edce3cae828", kill_on_drop: false }`
[INFO] [stdout] c633eaca0f76ba62ff4b9ebd4f0226e48828236143bb411ac9008edce3cae828