[INFO] cloning repository https://github.com/1195655796/15-week-homework4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/1195655796/15-week-homework4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1195655796%2F15-week-homework4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1195655796%2F15-week-homework4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dabf57e27186f00cc0888318dfcc527997a569cc
[INFO] checking 1195655796/15-week-homework4/dabf57e27186f00cc0888318dfcc527997a569cc against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1195655796%2F15-week-homework4" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/1195655796/15-week-homework4 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 git repo https://github.com/1195655796/15-week-homework4
[INFO] finished tweaking git repo https://github.com/1195655796/15-week-homework4
[INFO] tweaked toml for git repo https://github.com/1195655796/15-week-homework4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/1195655796/15-week-homework4 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] cc918379b568ad6897ab53ffd8c4d1e915869a8f6a207748b367270a4a20e8ea
[INFO] running `Command { std: "docker" "start" "-a" "cc918379b568ad6897ab53ffd8c4d1e915869a8f6a207748b367270a4a20e8ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc918379b568ad6897ab53ffd8c4d1e915869a8f6a207748b367270a4a20e8ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc918379b568ad6897ab53ffd8c4d1e915869a8f6a207748b367270a4a20e8ea", kill_on_drop: false }`
[INFO] [stdout] cc918379b568ad6897ab53ffd8c4d1e915869a8f6a207748b367270a4a20e8ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3b5e4fd9d1a99020e2a5d4742257700b343d33b0fa5bdd8721b14137575e80af
[INFO] running `Command { std: "docker" "start" "-a" "3b5e4fd9d1a99020e2a5d4742257700b343d33b0fa5bdd8721b14137575e80af", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.83
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling serde v1.0.202
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking winnow v0.6.8
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.65
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking pest v2.7.10
[INFO] [stderr]    Compiling pest_meta v2.7.10
[INFO] [stderr]    Compiling pest_generator v2.7.10
[INFO] [stderr]    Compiling pest_derive v2.7.10
[INFO] [stderr]     Checking grammar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `let` scrutinee expression
[INFO] [stdout]    --> src/json.rs:97:13
[INFO] [stdout]     |
[INFO] [stdout] 97  |             ("e".value(())
[INFO] [stdout]     |             ^
[INFO] [stdout] ...
[INFO] [stdout] 105 |                 })) {
[INFO] [stdout]     |                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 97  ~             "e".value(())
[INFO] [stdout] 98  |                 .parse_next(input)
[INFO] [stdout] ...
[INFO] [stdout] 104 |                     .parse_next(input)
[INFO] [stdout] 105 ~                 }) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `let` scrutinee expression
[INFO] [stdout]    --> src/json.rs:97:13
[INFO] [stdout]     |
[INFO] [stdout] 97  |             ("e".value(())
[INFO] [stdout]     |             ^
[INFO] [stdout] ...
[INFO] [stdout] 105 |                 })) {
[INFO] [stdout]     |                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 97  ~             "e".value(())
[INFO] [stdout] 98  |                 .parse_next(input)
[INFO] [stdout] ...
[INFO] [stdout] 104 |                     .parse_next(input)
[INFO] [stdout] 105 ~                 }) {
[INFO] [stdout]     |
[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 18.64s
[INFO] running `Command { std: "docker" "inspect" "3b5e4fd9d1a99020e2a5d4742257700b343d33b0fa5bdd8721b14137575e80af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b5e4fd9d1a99020e2a5d4742257700b343d33b0fa5bdd8721b14137575e80af", kill_on_drop: false }`
[INFO] [stdout] 3b5e4fd9d1a99020e2a5d4742257700b343d33b0fa5bdd8721b14137575e80af