[INFO] cloning repository https://github.com/artichoke/playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/artichoke/playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartichoke%2Fplayground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartichoke%2Fplayground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29b4f7a6bd8072a2423098ffaf7a2f2ec6e22f01
[INFO] checking artichoke/playground against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartichoke%2Fplayground" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/artichoke/playground on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/artichoke/playground
[INFO] finished tweaking git repo https://github.com/artichoke/playground
[INFO] tweaked toml for git repo https://github.com/artichoke/playground written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/artichoke/playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3b9ee30190ababf059a9d5e0707b3997be910e9691dab2e1cb6ad1072f54a55
[INFO] running `Command { std: "docker" "start" "-a" "e3b9ee30190ababf059a9d5e0707b3997be910e9691dab2e1cb6ad1072f54a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3b9ee30190ababf059a9d5e0707b3997be910e9691dab2e1cb6ad1072f54a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3b9ee30190ababf059a9d5e0707b3997be910e9691dab2e1cb6ad1072f54a55", kill_on_drop: false }`
[INFO] [stdout] e3b9ee30190ababf059a9d5e0707b3997be910e9691dab2e1cb6ad1072f54a55
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be734cf7da48d83e43904108780460a0d73925a947f04a572940cc9d650bb08c
[INFO] running `Command { std: "docker" "start" "-a" "be734cf7da48d83e43904108780460a0d73925a947f04a572940cc9d650bb08c", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling target-lexicon v0.12.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking focaccia v1.0.2
[INFO] [stderr]     Checking scolapasta-hex v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking artichoke-core v0.8.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking intaglio v1.2.2
[INFO] [stderr]     Checking spinoso-array v0.5.1 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling libloading v0.7.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]     Checking spinoso-math v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling cstr v0.2.8
[INFO] [stderr]     Checking scolapasta-string-escape v0.2.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]     Checking spinoso-env v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking spinoso-exception v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking spinoso-symbol v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking spinoso-random v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking spinoso-securerandom v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling artichoke v0.1.0-pre.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking spinoso-regexp v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling artichoke-backend v0.1.0 (https://github.com/artichoke/artichoke.git?rev=deb2505a359ecfa51832b4d84e085afa385607fc#deb2505a)
[INFO] [stderr]     Checking playground v0.4.0 (/opt/rustwide/workdir/playground)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "be734cf7da48d83e43904108780460a0d73925a947f04a572940cc9d650bb08c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be734cf7da48d83e43904108780460a0d73925a947f04a572940cc9d650bb08c", kill_on_drop: false }`
[INFO] [stdout] be734cf7da48d83e43904108780460a0d73925a947f04a572940cc9d650bb08c