[INFO] fetching crate refer 0.1.3...
[INFO] checking refer-0.1.3 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate refer 0.1.3 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate refer 0.1.3 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ed871a62c0b52d6999c280d75ea05f4857a258d70b42ffe95c95ed38a88752b
[INFO] running `Command { std: "docker" "start" "-a" "9ed871a62c0b52d6999c280d75ea05f4857a258d70b42ffe95c95ed38a88752b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ed871a62c0b52d6999c280d75ea05f4857a258d70b42ffe95c95ed38a88752b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ed871a62c0b52d6999c280d75ea05f4857a258d70b42ffe95c95ed38a88752b", kill_on_drop: false }`
[INFO] [stdout] 9ed871a62c0b52d6999c280d75ea05f4857a258d70b42ffe95c95ed38a88752b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dtail_expr_drop_order" "-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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e73c85ec8e20a582b9bb75804a746398f5961ca39d8bddea13f67e86e576618
[INFO] running `Command { std: "docker" "start" "-a" "8e73c85ec8e20a582b9bb75804a746398f5961ca39d8bddea13f67e86e576618", 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: 1 warning emitted
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `Command { std: "docker" "inspect" "8e73c85ec8e20a582b9bb75804a746398f5961ca39d8bddea13f67e86e576618", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e73c85ec8e20a582b9bb75804a746398f5961ca39d8bddea13f67e86e576618", kill_on_drop: false }`
[INFO] [stdout] 8e73c85ec8e20a582b9bb75804a746398f5961ca39d8bddea13f67e86e576618