[INFO] fetching crate err-handler 1.0.0...
[INFO] checking err-handler-1.0.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate err-handler 1.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate err-handler 1.0.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate err-handler 1.0.0
[INFO] tweaked toml for crates.io crate err-handler 1.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate err-handler 1.0.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate err-handler 1.0.0 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b55822d595abcc6806547499c8f24511f3f7dbead4c86801c1107baa5e17af4
[INFO] running `Command { std: "docker" "start" "-a" "3b55822d595abcc6806547499c8f24511f3f7dbead4c86801c1107baa5e17af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b55822d595abcc6806547499c8f24511f3f7dbead4c86801c1107baa5e17af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b55822d595abcc6806547499c8f24511f3f7dbead4c86801c1107baa5e17af4", kill_on_drop: false }`
[INFO] [stdout] 3b55822d595abcc6806547499c8f24511f3f7dbead4c86801c1107baa5e17af4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88ce64d66eaf6c0c2dac1a16d8979a899494ab0df77d0f4c1dcf289e18d985db
[INFO] running `Command { std: "docker" "start" "-a" "88ce64d66eaf6c0c2dac1a16d8979a899494ab0df77d0f4c1dcf289e18d985db", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v2.0.58
[INFO] [stderr]     Checking err-handler v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stdout] warning: variant `Err2` is never constructed
[INFO] [stdout]  --> examples/exp.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Err {
[INFO] [stdout]   |      --- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9 |     Err2,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Err` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.34s
[INFO] running `Command { std: "docker" "inspect" "88ce64d66eaf6c0c2dac1a16d8979a899494ab0df77d0f4c1dcf289e18d985db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88ce64d66eaf6c0c2dac1a16d8979a899494ab0df77d0f4c1dcf289e18d985db", kill_on_drop: false }`
[INFO] [stdout] 88ce64d66eaf6c0c2dac1a16d8979a899494ab0df77d0f4c1dcf289e18d985db