[INFO] fetching crate refer 0.1.3...
[INFO] checking refer-0.1.3 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate refer 0.1.3 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate refer 0.1.3 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c09e8260dad032155d51789a10b4cc0a91e6f902b2e4d4086fefe9a1250c367
[INFO] running `Command { std: "docker" "start" "-a" "5c09e8260dad032155d51789a10b4cc0a91e6f902b2e4d4086fefe9a1250c367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c09e8260dad032155d51789a10b4cc0a91e6f902b2e4d4086fefe9a1250c367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c09e8260dad032155d51789a10b4cc0a91e6f902b2e4d4086fefe9a1250c367", kill_on_drop: false }`
[INFO] [stdout] 5c09e8260dad032155d51789a10b4cc0a91e6f902b2e4d4086fefe9a1250c367
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d4203193ce539cf0637d3c30f1d13791cf3a2e9f6450b6a8fa2ce9ad3d8624f
[INFO] running `Command { std: "docker" "start" "-a" "6d4203193ce539cf0637d3c30f1d13791cf3a2e9f6450b6a8fa2ce9ad3d8624f", kill_on_drop: false }`
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[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 2.34s
[INFO] running `Command { std: "docker" "inspect" "6d4203193ce539cf0637d3c30f1d13791cf3a2e9f6450b6a8fa2ce9ad3d8624f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d4203193ce539cf0637d3c30f1d13791cf3a2e9f6450b6a8fa2ce9ad3d8624f", kill_on_drop: false }`
[INFO] [stdout] 6d4203193ce539cf0637d3c30f1d13791cf3a2e9f6450b6a8fa2ce9ad3d8624f