[INFO] cloning repository https://github.com/gwy15/type_erase_exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gwy15/type_erase_exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgwy15%2Ftype_erase_exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgwy15%2Ftype_erase_exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89c4a6205a4f5680feb117cbbacdb87883f1bd02
[INFO] checking gwy15/type_erase_exercise against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgwy15%2Ftype_erase_exercise" "/workspace/builds/worker-89/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-89/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gwy15/type_erase_exercise on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gwy15/type_erase_exercise
[INFO] finished tweaking git repo https://github.com/gwy15/type_erase_exercise
[INFO] tweaked toml for git repo https://github.com/gwy15/type_erase_exercise written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] crate git repo https://github.com/gwy15/type_erase_exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded downcast v0.10.0
[INFO] [stderr]   Downloaded fragile v1.0.0
[INFO] [stderr]   Downloaded mockall_derive v0.9.1
[INFO] [stderr]   Downloaded mockall v0.9.1
[INFO] [stderr]   Downloaded syn v1.0.63
[INFO] [stderr]   Downloaded regex v1.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5c1696f9d74498fa199c531408dfadc0eb76bf6a7430c3cc1960f9b79adcc35
[INFO] running `Command { std: "docker" "start" "-a" "f5c1696f9d74498fa199c531408dfadc0eb76bf6a7430c3cc1960f9b79adcc35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5c1696f9d74498fa199c531408dfadc0eb76bf6a7430c3cc1960f9b79adcc35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5c1696f9d74498fa199c531408dfadc0eb76bf6a7430c3cc1960f9b79adcc35", kill_on_drop: false }`
[INFO] [stdout] f5c1696f9d74498fa199c531408dfadc0eb76bf6a7430c3cc1960f9b79adcc35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e8380efa6dce530a9598b515512a1e8507bc5ed89ff3f7f04e5d0ba9f1ef0ca
[INFO] running `Command { std: "docker" "start" "-a" "3e8380efa6dce530a9598b515512a1e8507bc5ed89ff3f7f04e5d0ba9f1ef0ca", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking downcast v0.10.0
[INFO] [stderr]     Checking fragile v1.0.0
[INFO] [stderr]     Checking type_erase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]    Compiling mockall_derive v0.9.1
[INFO] [stderr]     Checking mockall v0.9.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 08s
[INFO] running `Command { std: "docker" "inspect" "3e8380efa6dce530a9598b515512a1e8507bc5ed89ff3f7f04e5d0ba9f1ef0ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e8380efa6dce530a9598b515512a1e8507bc5ed89ff3f7f04e5d0ba9f1ef0ca", kill_on_drop: false }`
[INFO] [stdout] 3e8380efa6dce530a9598b515512a1e8507bc5ed89ff3f7f04e5d0ba9f1ef0ca