[INFO] cloning repository https://github.com/codesections/mnemonic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/codesections/mnemonic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c63b320f2a323cd661cc51ceb520f86c80cb8af9
[INFO] checking codesections/mnemonic against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/codesections/mnemonic on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/codesections/mnemonic
[INFO] finished tweaking git repo https://github.com/codesections/mnemonic
[INFO] tweaked toml for git repo https://github.com/codesections/mnemonic written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/codesections/mnemonic already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v0.4.26
[INFO] [stderr]   Downloaded combine v3.6.6
[INFO] [stderr]   Downloaded derive_builder_core v0.4.0
[INFO] [stderr]   Downloaded derive_builder v0.7.0
[INFO] [stderr]   Downloaded shell-words v0.1.0
[INFO] [stderr]   Downloaded directories v1.0.2
[INFO] [stderr]   Downloaded bincode v1.0.1
[INFO] [stderr]   Downloaded darling_core v0.8.3
[INFO] [stderr]   Downloaded darling_macro v0.8.3
[INFO] [stderr]   Downloaded prettyprint v0.4.1
[INFO] [stderr]   Downloaded globwalk v0.5.0
[INFO] [stderr]   Downloaded ansi_colours v1.0.1
[INFO] [stderr]   Downloaded man v0.3.0
[INFO] [stderr]   Downloaded open v1.2.2
[INFO] [stderr]   Downloaded plist v0.3.0
[INFO] [stderr]   Downloaded ignore v0.4.6
[INFO] [stderr]   Downloaded serde_json v1.0.37
[INFO] [stderr]   Downloaded yaml-rust v0.4.2
[INFO] [stderr]   Downloaded darling v0.8.3
[INFO] [stderr]   Downloaded error-chain v0.12.0
[INFO] [stderr]   Downloaded toml_edit v0.1.3
[INFO] [stderr]   Downloaded ascii v0.9.1
[INFO] [stderr]   Downloaded serde_derive v1.0.85
[INFO] [stderr]   Downloaded content_inspector v0.2.4
[INFO] [stderr]   Downloaded globset v0.4.2
[INFO] [stderr]   Downloaded onig v4.3.1
[INFO] [stderr]   Downloaded assert_fs v0.11.3
[INFO] [stderr]   Downloaded onig_sys v69.1.0
[INFO] [stderr]   Downloaded syntect v3.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7faae39f43afce3e81b92ae01ce22c812b0bdb24f56a6c2da234f589ad3b54f1
[INFO] running `Command { std: "docker" "start" "-a" "7faae39f43afce3e81b92ae01ce22c812b0bdb24f56a6c2da234f589ad3b54f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7faae39f43afce3e81b92ae01ce22c812b0bdb24f56a6c2da234f589ad3b54f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7faae39f43afce3e81b92ae01ce22c812b0bdb24f56a6c2da234f589ad3b54f1", kill_on_drop: false }`
[INFO] [stdout] 7faae39f43afce3e81b92ae01ce22c812b0bdb24f56a6c2da234f589ad3b54f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c9d8d98a11dedc097363d7e8b2a13c83085ce12108f20afff76cf9df275eb22
[INFO] running `Command { std: "docker" "start" "-a" "9c9d8d98a11dedc097363d7e8b2a13c83085ce12108f20afff76cf9df275eb22", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: failed to create jobserver
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to increase jobserver pipe capacity from 4096 to 8192; jobserver otherwise might deadlock
[INFO] running `Command { std: "docker" "inspect" "9c9d8d98a11dedc097363d7e8b2a13c83085ce12108f20afff76cf9df275eb22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c9d8d98a11dedc097363d7e8b2a13c83085ce12108f20afff76cf9df275eb22", kill_on_drop: false }`
[INFO] [stdout] 9c9d8d98a11dedc097363d7e8b2a13c83085ce12108f20afff76cf9df275eb22