[INFO] fetching crate name_maker 0.1.1...
[INFO] building name_maker-0.1.1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate name_maker 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate name_maker 0.1.1 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate name_maker 0.1.1
[INFO] finished tweaking crates.io crate name_maker 0.1.1
[INFO] tweaked toml for crates.io crate name_maker 0.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate name_maker 0.1.1 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8cf636a03ce6b9573e221802f37bb172cd1ae318e17d06204d8667c769a5492
[INFO] running `Command { std: "docker" "start" "-a" "d8cf636a03ce6b9573e221802f37bb172cd1ae318e17d06204d8667c769a5492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8cf636a03ce6b9573e221802f37bb172cd1ae318e17d06204d8667c769a5492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8cf636a03ce6b9573e221802f37bb172cd1ae318e17d06204d8667c769a5492", kill_on_drop: false }`
[INFO] [stdout] d8cf636a03ce6b9573e221802f37bb172cd1ae318e17d06204d8667c769a5492
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 084dbb4dc7c2655bbb2bd7e335c285ecdd55636b7a17f25ffe572b51973cb1ca
[INFO] running `Command { std: "docker" "start" "-a" "084dbb4dc7c2655bbb2bd7e335c285ecdd55636b7a17f25ffe572b51973cb1ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.4
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling name_maker v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/main.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 88  |         0..=1 => return Err("Too few command arguments."),
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] 89  |         2 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 101 |         3 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 117 |         4.. => return Err("Too many command arguments."),
[INFO] [stdout]     |         --- matches some of the same values
[INFO] [stdout] 118 |         _ => panic!("Should not reach here.")
[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/main.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         0..=1 => return Err("Too few command arguments."),
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] 127 |         2 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 135 |         3 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 149 |         4.. => return Err("Too many command arguments."),
[INFO] [stdout]     |         --- matches some of the same values
[INFO] [stdout] 150 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `Command { std: "docker" "inspect" "084dbb4dc7c2655bbb2bd7e335c285ecdd55636b7a17f25ffe572b51973cb1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "084dbb4dc7c2655bbb2bd7e335c285ecdd55636b7a17f25ffe572b51973cb1ca", kill_on_drop: false }`
[INFO] [stdout] 084dbb4dc7c2655bbb2bd7e335c285ecdd55636b7a17f25ffe572b51973cb1ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9c49d38214c678c587a4b4dffc4704db9f09c9dc8c89a872c6c247829a9dce3
[INFO] running `Command { std: "docker" "start" "-a" "d9c49d38214c678c587a4b4dffc4704db9f09c9dc8c89a872c6c247829a9dce3", kill_on_drop: false }`
[INFO] [stderr]    Compiling name_maker v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/main.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 88  |         0..=1 => return Err("Too few command arguments."),
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] 89  |         2 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 101 |         3 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 117 |         4.. => return Err("Too many command arguments."),
[INFO] [stdout]     |         --- matches some of the same values
[INFO] [stdout] 118 |         _ => panic!("Should not reach here.")
[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/main.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         0..=1 => return Err("Too few command arguments."),
[INFO] [stdout]     |         ----- matches some of the same values
[INFO] [stdout] 127 |         2 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 135 |         3 => {
[INFO] [stdout]     |         - matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 149 |         4.. => return Err("Too many command arguments."),
[INFO] [stdout]     |         --- matches some of the same values
[INFO] [stdout] 150 |         _ => panic!("Should not reach here.")
[INFO] [stdout]     |         ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "d9c49d38214c678c587a4b4dffc4704db9f09c9dc8c89a872c6c247829a9dce3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c49d38214c678c587a4b4dffc4704db9f09c9dc8c89a872c6c247829a9dce3", kill_on_drop: false }`
[INFO] [stdout] d9c49d38214c678c587a4b4dffc4704db9f09c9dc8c89a872c6c247829a9dce3