[INFO] fetching crate cpsc323-lexer 0.1.0...
[INFO] building cpsc323-lexer-0.1.0 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate cpsc323-lexer 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate cpsc323-lexer 0.1.0 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 cpsc323-lexer 0.1.0
[INFO] finished tweaking crates.io crate cpsc323-lexer 0.1.0
[INFO] tweaked toml for crates.io crate cpsc323-lexer 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate cpsc323-lexer 0.1.0 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" "+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-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8139fc70087e68b312848652fece19e47f91bf7f6c4235648edd49f0cfca070b
[INFO] running `Command { std: "docker" "start" "-a" "8139fc70087e68b312848652fece19e47f91bf7f6c4235648edd49f0cfca070b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8139fc70087e68b312848652fece19e47f91bf7f6c4235648edd49f0cfca070b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8139fc70087e68b312848652fece19e47f91bf7f6c4235648edd49f0cfca070b", kill_on_drop: false }`
[INFO] [stdout] 8139fc70087e68b312848652fece19e47f91bf7f6c4235648edd49f0cfca070b
[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 -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] ea13b3f442e8b902ca57b6b73dffbafa3e63006e814457af55bbe4f8d20a5c0a
[INFO] running `Command { std: "docker" "start" "-a" "ea13b3f442e8b902ca57b6b73dffbafa3e63006e814457af55bbe4f8d20a5c0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cpsc323-lexer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | /         match val {
[INFO] [stdout] 162 | |             Ok(tok) => writeln!(f, "{:>10} = {}", format!("{:?}", tok.ty), tok.lex),
[INFO] [stdout] 163 | |             Err(e) => {
[INFO] [stdout] 164 | |                 f.flush()?;
[INFO] [stdout] ...   |
[INFO] [stdout] 172 | |         };
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let _ = match val {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "ea13b3f442e8b902ca57b6b73dffbafa3e63006e814457af55bbe4f8d20a5c0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea13b3f442e8b902ca57b6b73dffbafa3e63006e814457af55bbe4f8d20a5c0a", kill_on_drop: false }`
[INFO] [stdout] ea13b3f442e8b902ca57b6b73dffbafa3e63006e814457af55bbe4f8d20a5c0a
[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 -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] da470d12247e38958c47a5f9e5557ed51e6a46b615bf094ca67613541c22f3c7
[INFO] running `Command { std: "docker" "start" "-a" "da470d12247e38958c47a5f9e5557ed51e6a46b615bf094ca67613541c22f3c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling cpsc323-lexer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | /         match val {
[INFO] [stdout] 162 | |             Ok(tok) => writeln!(f, "{:>10} = {}", format!("{:?}", tok.ty), tok.lex),
[INFO] [stdout] 163 | |             Err(e) => {
[INFO] [stdout] 164 | |                 f.flush()?;
[INFO] [stdout] ...   |
[INFO] [stdout] 172 | |         };
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let _ = match val {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "da470d12247e38958c47a5f9e5557ed51e6a46b615bf094ca67613541c22f3c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da470d12247e38958c47a5f9e5557ed51e6a46b615bf094ca67613541c22f3c7", kill_on_drop: false }`
[INFO] [stdout] da470d12247e38958c47a5f9e5557ed51e6a46b615bf094ca67613541c22f3c7