[INFO] fetching crate prefer-dynamic 0.1.2...
[INFO] checking prefer-dynamic-0.1.2 against master#7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e for pr-102091
[INFO] extracting crate prefer-dynamic 0.1.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate prefer-dynamic 0.1.2 on toolchain 7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prefer-dynamic 0.1.2
[INFO] finished tweaking crates.io crate prefer-dynamic 0.1.2
[INFO] tweaked toml for crates.io crate prefer-dynamic 0.1.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded convert_case v0.4.0
[INFO] [stderr]   Downloaded build_cfg_macros v1.1.0
[INFO] [stderr]   Downloaded derive_more v0.99.17
[INFO] [stderr]   Downloaded semver v1.0.14
[INFO] [stderr]   Downloaded build_cfg_shared v1.1.0
[INFO] [stderr]   Downloaded build_cfg v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:06bd2dc561ac9b9120e7d8112cca06cd3b1bded0ddb8515a4f6a39439d56c944" "/opt/rustwide/cargo-home/bin/cargo" "+7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1eb24fb3b53041475cf451aa5ed7f9d516ac35926fd061a99aade7404d5c3af
[INFO] running `Command { std: "docker" "start" "-a" "b1eb24fb3b53041475cf451aa5ed7f9d516ac35926fd061a99aade7404d5c3af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1eb24fb3b53041475cf451aa5ed7f9d516ac35926fd061a99aade7404d5c3af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1eb24fb3b53041475cf451aa5ed7f9d516ac35926fd061a99aade7404d5c3af", kill_on_drop: false }`
[INFO] [stdout] b1eb24fb3b53041475cf451aa5ed7f9d516ac35926fd061a99aade7404d5c3af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:06bd2dc561ac9b9120e7d8112cca06cd3b1bded0ddb8515a4f6a39439d56c944" "/opt/rustwide/cargo-home/bin/cargo" "+7a8636c843bd24038fe1d1f69b4a8e4b0ea55d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33b6246304122f21379264731275c6de27b11f2a5b8946c0ddcd76212ca5bfc7
[INFO] running `Command { std: "docker" "start" "-a" "33b6246304122f21379264731275c6de27b11f2a5b8946c0ddcd76212ca5bfc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling build_cfg_shared v1.1.0
[INFO] [stderr]    Compiling build_cfg_macros v1.1.0
[INFO] [stderr]    Compiling build_cfg v1.1.0
[INFO] [stderr]    Compiling prefer-dynamic v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.06s
[INFO] running `Command { std: "docker" "inspect" "33b6246304122f21379264731275c6de27b11f2a5b8946c0ddcd76212ca5bfc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33b6246304122f21379264731275c6de27b11f2a5b8946c0ddcd76212ca5bfc7", kill_on_drop: false }`
[INFO] [stdout] 33b6246304122f21379264731275c6de27b11f2a5b8946c0ddcd76212ca5bfc7