[INFO] fetching crate piece 0.2.1...
[INFO] checking piece-0.2.1 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate piece 0.2.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate piece 0.2.1
[INFO] finished tweaking crates.io crate piece 0.2.1
[INFO] tweaked toml for crates.io crate piece 0.2.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate piece 0.2.1 on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]       Adding allocator-api2 v0.2.21 (available: v0.4.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55019adbf0213d26986fc45dbdfde9a651de5ccee1c9fa4d06cc958f15c6db6d
[INFO] running `Command { std: "docker" "start" "-a" "55019adbf0213d26986fc45dbdfde9a651de5ccee1c9fa4d06cc958f15c6db6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55019adbf0213d26986fc45dbdfde9a651de5ccee1c9fa4d06cc958f15c6db6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55019adbf0213d26986fc45dbdfde9a651de5ccee1c9fa4d06cc958f15c6db6d", kill_on_drop: false }`
[INFO] [stdout] 55019adbf0213d26986fc45dbdfde9a651de5ccee1c9fa4d06cc958f15c6db6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a2568a8fec4c6ad20378b27d6015688526a324242b88bd4189ac88457365009
[INFO] running `Command { std: "docker" "start" "-a" "8a2568a8fec4c6ad20378b27d6015688526a324242b88bd4189ac88457365009", kill_on_drop: false }`
[INFO] [stderr]     Checking piece v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: feature `allocator_api` is declared but not used
[INFO] [stdout]  --> tests/chain_allocator.rs:1:46
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "stable"), feature(allocator_api))]
[INFO] [stdout]   |                                              ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `allocator_api` is declared but not used
[INFO] [stdout]  --> tests/linear_allocator.rs:1:46
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "stable"), feature(allocator_api))]
[INFO] [stdout]   |                                              ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "8a2568a8fec4c6ad20378b27d6015688526a324242b88bd4189ac88457365009", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a2568a8fec4c6ad20378b27d6015688526a324242b88bd4189ac88457365009", kill_on_drop: false }`
[INFO] [stdout] 8a2568a8fec4c6ad20378b27d6015688526a324242b88bd4189ac88457365009
