[INFO] fetching crate muchutils 0.1.0...
[INFO] checking muchutils-0.1.0 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate muchutils 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate muchutils 0.1.0 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate muchutils 0.1.0
[INFO] finished tweaking crates.io crate muchutils 0.1.0
[INFO] tweaked toml for crates.io crate muchutils 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate muchutils 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e94c53f8896e5230eda1f6e8a9f74dc0772d4d5dbbd901b60e16152311bcf122
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e94c53f8896e5230eda1f6e8a9f74dc0772d4d5dbbd901b60e16152311bcf122", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e94c53f8896e5230eda1f6e8a9f74dc0772d4d5dbbd901b60e16152311bcf122", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e94c53f8896e5230eda1f6e8a9f74dc0772d4d5dbbd901b60e16152311bcf122", kill_on_drop: false }`
[INFO] [stdout] e94c53f8896e5230eda1f6e8a9f74dc0772d4d5dbbd901b60e16152311bcf122
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cdc70a6d5f4f1fb07e0e4d3d1555143949a2b0087e7b79ef5239ed7d9e0f171
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7cdc70a6d5f4f1fb07e0e4d3d1555143949a2b0087e7b79ef5239ed7d9e0f171", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking iowrap v0.2.0
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.4.1
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking lru v0.6.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tempfile-fast v0.3.3
[INFO] [stderr]     Checking muchutils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.00s
[INFO] running `Command { std: "docker" "inspect" "7cdc70a6d5f4f1fb07e0e4d3d1555143949a2b0087e7b79ef5239ed7d9e0f171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cdc70a6d5f4f1fb07e0e4d3d1555143949a2b0087e7b79ef5239ed7d9e0f171", kill_on_drop: false }`
[INFO] [stdout] 7cdc70a6d5f4f1fb07e0e4d3d1555143949a2b0087e7b79ef5239ed7d9e0f171