[INFO] cloning repository https://github.com/daMelody/tagcsv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/daMelody/tagcsv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdaMelody%2Ftagcsv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdaMelody%2Ftagcsv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e278ae647deb5fff681a49403000a3ad59382ce2
[INFO] testing daMelody/tagcsv against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdaMelody%2Ftagcsv" "/workspace/builds/worker-47/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-47/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/daMelody/tagcsv on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-47/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/daMelody/tagcsv
[INFO] finished tweaking git repo https://github.com/daMelody/tagcsv
[INFO] tweaked toml for git repo https://github.com/daMelody/tagcsv written to /workspace/builds/worker-47/source/Cargo.toml
[INFO] crate git repo https://github.com/daMelody/tagcsv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9130531a9c803041eba16d2345b40964f2dd64313d18205d1c5b00d47e29d20
[INFO] running `Command { std: "docker" "start" "-a" "a9130531a9c803041eba16d2345b40964f2dd64313d18205d1c5b00d47e29d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9130531a9c803041eba16d2345b40964f2dd64313d18205d1c5b00d47e29d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9130531a9c803041eba16d2345b40964f2dd64313d18205d1c5b00d47e29d20", kill_on_drop: false }`
[INFO] [stdout] a9130531a9c803041eba16d2345b40964f2dd64313d18205d1c5b00d47e29d20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8b8ec25e3fd2377db68071282b004882ecf656770b3b3e357b432192f59a8a6
[INFO] running `Command { std: "docker" "start" "-a" "b8b8ec25e3fd2377db68071282b004882ecf656770b3b3e357b432192f59a8a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling tagcsv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_set_entry)]
[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 `tagcsv` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b8b8ec25e3fd2377db68071282b004882ecf656770b3b3e357b432192f59a8a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8b8ec25e3fd2377db68071282b004882ecf656770b3b3e357b432192f59a8a6", kill_on_drop: false }`
[INFO] [stdout] b8b8ec25e3fd2377db68071282b004882ecf656770b3b3e357b432192f59a8a6