[INFO] cloning repository https://github.com/PurpleMyst/lazyminer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PurpleMyst/lazyminer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Flazyminer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Flazyminer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3bc1514dfd4f7ccc8ce270e9d8c9a684eb22305e
[INFO] checking PurpleMyst/lazyminer against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Flazyminer" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PurpleMyst/lazyminer
[INFO] finished tweaking git repo https://github.com/PurpleMyst/lazyminer
[INFO] tweaked toml for git repo https://github.com/PurpleMyst/lazyminer written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PurpleMyst/lazyminer 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 git repo https://github.com/PurpleMyst/lazyminer 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]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-set v0.5.1
[INFO] [stderr]   Downloaded autocfg v0.1.4
[INFO] [stderr]   Downloaded tempfile v3.0.9
[INFO] [stderr]   Downloaded rusty-fork v0.2.2
[INFO] [stderr]   Downloaded serde v1.0.94
[INFO] [stderr]   Downloaded proptest v0.9.4
[INFO] [stderr]   Downloaded regex-syntax v0.6.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 72d16a2011d64faf00f7312af18e2b042ce9c9b3c9f2adbd9fd5bb6f639d60ab
[INFO] running `Command { std: "docker" "start" "-a" "72d16a2011d64faf00f7312af18e2b042ce9c9b3c9f2adbd9fd5bb6f639d60ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72d16a2011d64faf00f7312af18e2b042ce9c9b3c9f2adbd9fd5bb6f639d60ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d16a2011d64faf00f7312af18e2b042ce9c9b3c9f2adbd9fd5bb6f639d60ab", kill_on_drop: false }`
[INFO] [stdout] 72d16a2011d64faf00f7312af18e2b042ce9c9b3c9f2adbd9fd5bb6f639d60ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 80eb06e0811fb4b73887b3bac54c08fb113c7118f7892128cab76932db5ac2bd
[INFO] running `Command { std: "docker" "start" "-a" "80eb06e0811fb4b73887b3bac54c08fb113c7118f7892128cab76932db5ac2bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[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/serde-1.0.94/src/lib.rs:83:35
[INFO] [stdout]    |
[INFO] [stdout] 83 | #![cfg_attr(feature = "unstable", feature(specialization, never_type))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking tempfile v3.0.9
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.9.4
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "80eb06e0811fb4b73887b3bac54c08fb113c7118f7892128cab76932db5ac2bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80eb06e0811fb4b73887b3bac54c08fb113c7118f7892128cab76932db5ac2bd", kill_on_drop: false }`
[INFO] [stdout] 80eb06e0811fb4b73887b3bac54c08fb113c7118f7892128cab76932db5ac2bd
