[INFO] cloning repository https://github.com/fexolm/jfec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fexolm/jfec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6de42e1766324b065d6ef53eb278677017d115bc
[INFO] checking fexolm/jfec against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fexolm/jfec on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fexolm/jfec
[INFO] finished tweaking git repo https://github.com/fexolm/jfec
[INFO] tweaked toml for git repo https://github.com/fexolm/jfec written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/fexolm/jfec already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5db86ceeb8988ea125d1d013cc14bf4ec6155641c81debac7d1b2ac69b2e275
[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" "a5db86ceeb8988ea125d1d013cc14bf4ec6155641c81debac7d1b2ac69b2e275", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5db86ceeb8988ea125d1d013cc14bf4ec6155641c81debac7d1b2ac69b2e275", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5db86ceeb8988ea125d1d013cc14bf4ec6155641c81debac7d1b2ac69b2e275", kill_on_drop: false }`
[INFO] [stdout] a5db86ceeb8988ea125d1d013cc14bf4ec6155641c81debac7d1b2ac69b2e275
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 939aab94d51355e4baf6db88e61dd62b0d3b2f7101187efaf1dea04e6277641e
[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" "939aab94d51355e4baf6db88e61dd62b0d3b2f7101187efaf1dea04e6277641e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking pest v2.1.0
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]    Compiling pest_meta v2.1.0
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling llvm-sys v70.1.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking jfec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]    --> src/codegen/ssa/instruction.rs:27:13
[INFO] [stdout]     |
[INFO] [stdout] 27  |         use std::convert::AsRef;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.1.2
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]    --> src/codegen/ssa/instruction.rs:27:13
[INFO] [stdout]     |
[INFO] [stdout] 27  |         use std::convert::AsRef;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 10s
[INFO] running `Command { std: "docker" "inspect" "939aab94d51355e4baf6db88e61dd62b0d3b2f7101187efaf1dea04e6277641e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "939aab94d51355e4baf6db88e61dd62b0d3b2f7101187efaf1dea04e6277641e", kill_on_drop: false }`
[INFO] [stdout] 939aab94d51355e4baf6db88e61dd62b0d3b2f7101187efaf1dea04e6277641e