[INFO] fetching crate refer 0.1.3...
[INFO] checking refer-0.1.3 against master#a3f76a26e045a760bb1163b7eab36872985242d5 for pr-130930
[INFO] extracting crate refer 0.1.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate refer 0.1.3 on toolchain a3f76a26e045a760bb1163b7eab36872985242d5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate refer 0.1.3
[INFO] finished tweaking crates.io crate refer 0.1.3
[INFO] tweaked toml for crates.io crate refer 0.1.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "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] 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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03210fba89b2f51a8ebfd5586ca55aa9f06a2e4f46c52af76f308087d7c29d5f
[INFO] running `Command { std: "docker" "start" "-a" "03210fba89b2f51a8ebfd5586ca55aa9f06a2e4f46c52af76f308087d7c29d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03210fba89b2f51a8ebfd5586ca55aa9f06a2e4f46c52af76f308087d7c29d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03210fba89b2f51a8ebfd5586ca55aa9f06a2e4f46c52af76f308087d7c29d5f", kill_on_drop: false }`
[INFO] [stdout] 03210fba89b2f51a8ebfd5586ca55aa9f06a2e4f46c52af76f308087d7c29d5f
[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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 937fc3450523ed605a890024f2e4d311b79d34995d4f944e2c3e9b1164e9bfe8
[INFO] running `Command { std: "docker" "start" "-a" "937fc3450523ed605a890024f2e4d311b79d34995d4f944e2c3e9b1164e9bfe8", kill_on_drop: false }`
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking refer v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/reader.rs:422:9
[INFO] [stdout]     |
[INFO] [stdout] 422 |         e => {
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/reader.rs:422:9
[INFO] [stdout]     |
[INFO] [stdout] 399 |         0..=1 => {
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 405 |         2 => Ok(Author {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 409 |         n @ 3.. => {
[INFO] [stdout]     |             --- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 422 |         e => {
[INFO] [stdout]     |         ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/reader.rs:422:9
[INFO] [stdout]     |
[INFO] [stdout] 422 |         e => {
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/reader.rs:422:9
[INFO] [stdout]     |
[INFO] [stdout] 399 |         0..=1 => {
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 405 |         2 => Ok(Author {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 409 |         n @ 3.. => {
[INFO] [stdout]     |             --- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 422 |         e => {
[INFO] [stdout]     |         ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "937fc3450523ed605a890024f2e4d311b79d34995d4f944e2c3e9b1164e9bfe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "937fc3450523ed605a890024f2e4d311b79d34995d4f944e2c3e9b1164e9bfe8", kill_on_drop: false }`
[INFO] [stdout] 937fc3450523ed605a890024f2e4d311b79d34995d4f944e2c3e9b1164e9bfe8