[INFO] cloning repository https://github.com/VendettaReborn/better-error-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VendettaReborn/better-error-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVendettaReborn%2Fbetter-error-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVendettaReborn%2Fbetter-error-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2f73ca20e0ae3d33c6f5c1422440d7d8e1bade9
[INFO] checking VendettaReborn/better-error-experiment/e2f73ca20e0ae3d33c6f5c1422440d7d8e1bade9 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVendettaReborn%2Fbetter-error-experiment" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VendettaReborn/better-error-experiment on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VendettaReborn/better-error-experiment
[INFO] finished tweaking git repo https://github.com/VendettaReborn/better-error-experiment
[INFO] tweaked toml for git repo https://github.com/VendettaReborn/better-error-experiment written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/VendettaReborn/better-error-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eeb41414dadf0cfe1bd1a0005431c0c338c9a95e041317924f783855c1b7e6f7
[INFO] running `Command { std: "docker" "start" "-a" "eeb41414dadf0cfe1bd1a0005431c0c338c9a95e041317924f783855c1b7e6f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeb41414dadf0cfe1bd1a0005431c0c338c9a95e041317924f783855c1b7e6f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeb41414dadf0cfe1bd1a0005431c0c338c9a95e041317924f783855c1b7e6f7", kill_on_drop: false }`
[INFO] [stdout] eeb41414dadf0cfe1bd1a0005431c0c338c9a95e041317924f783855c1b7e6f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 028d4f21bda04aff4bc0d08922422554875d7bfddf8368eaa693f96cb3e9cf22
[INFO] running `Command { std: "docker" "start" "-a" "028d4f21bda04aff4bc0d08922422554875d7bfddf8368eaa693f96cb3e9cf22", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling syn v2.0.74
[INFO] [stderr]     Checking proc-macro2 v1.0.86
[INFO] [stderr]     Checking quote v1.0.36
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking stack-error-macro v0.1.0 (/opt/rustwide/workdir/stack-error-macro)
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]    Compiling snafu-derive v0.8.4
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking snafu v0.8.4
[INFO] [stderr]     Checking stack-error v0.1.0 (/opt/rustwide/workdir/stack-error)
[INFO] [stderr]     Checking tracing-examples v0.0.0 (/opt/rustwide/workdir/examples)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.17s
[INFO] running `Command { std: "docker" "inspect" "028d4f21bda04aff4bc0d08922422554875d7bfddf8368eaa693f96cb3e9cf22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "028d4f21bda04aff4bc0d08922422554875d7bfddf8368eaa693f96cb3e9cf22", kill_on_drop: false }`
[INFO] [stdout] 028d4f21bda04aff4bc0d08922422554875d7bfddf8368eaa693f96cb3e9cf22