[INFO] cloning repository https://github.com/zummenix/xcopen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zummenix/xcopen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzummenix%2Fxcopen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzummenix%2Fxcopen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c27b28f39c4e6f69cd91db60a8d2149d7cd55c9b
[INFO] checking zummenix/xcopen against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzummenix%2Fxcopen" "/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/zummenix/xcopen on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zummenix/xcopen
[INFO] finished tweaking git repo https://github.com/zummenix/xcopen
[INFO] tweaked toml for git repo https://github.com/zummenix/xcopen written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/zummenix/xcopen already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8parse v0.2.0
[INFO] [stderr]   Downloaded dirs-sys-next v0.1.0
[INFO] [stderr]   Downloaded dirs-next v1.0.1
[INFO] [stderr]   Downloaded rustyline v6.3.0
[INFO] [stderr]   Downloaded nix v0.18.0
[INFO] [stderr]   Downloaded structopt v0.3.18
[INFO] [stderr]   Downloaded structopt-derive v0.4.11
[INFO] [stderr]   Downloaded winapi-util v0.1.3
[INFO] [stderr]   Downloaded expectest v0.12.0
[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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 01f29f751f810d369951d07a672efba084314f4ce7535a761bdead55f4d2cf13
[INFO] running `Command { std: "docker" "start" "-a" "01f29f751f810d369951d07a672efba084314f4ce7535a761bdead55f4d2cf13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01f29f751f810d369951d07a672efba084314f4ce7535a761bdead55f4d2cf13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01f29f751f810d369951d07a672efba084314f4ce7535a761bdead55f4d2cf13", kill_on_drop: false }`
[INFO] [stdout] 01f29f751f810d369951d07a672efba084314f4ce7535a761bdead55f4d2cf13
[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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c93393e76cfbf36718567a644b6106b3bf15549a996858030703324274f86a7
[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" "5c93393e76cfbf36718567a644b6106b3bf15549a996858030703324274f86a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking expectest v0.12.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs-next v1.0.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]     Checking rustyline v6.3.0
[INFO] [stderr]    Compiling structopt-derive v0.4.11
[INFO] [stderr]     Checking structopt v0.3.18
[INFO] [stderr]     Checking xcopen v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.54s
[INFO] running `Command { std: "docker" "inspect" "5c93393e76cfbf36718567a644b6106b3bf15549a996858030703324274f86a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c93393e76cfbf36718567a644b6106b3bf15549a996858030703324274f86a7", kill_on_drop: false }`
[INFO] [stdout] 5c93393e76cfbf36718567a644b6106b3bf15549a996858030703324274f86a7