[INFO] fetching crate serdo 0.1.5-beta.1...
[INFO] checking serdo-0.1.5-beta.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate serdo 0.1.5-beta.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate serdo 0.1.5-beta.1 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 serdo 0.1.5-beta.1
[INFO] finished tweaking crates.io crate serdo 0.1.5-beta.1
[INFO] tweaked toml for crates.io crate serdo 0.1.5-beta.1 written to /workspace/builds/worker-0-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 74 packages to latest compatible versions
[INFO] [stderr]       Adding error-stack v0.4.1 (available: v0.5.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.14 (available: v0.6.5)
[INFO] [stderr]       Adding matchers v0.1.0 (available: v0.2.0)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (available: v0.50.1)
[INFO] [stderr]       Adding regex-automata v0.1.10 (available: v0.4.7)
[INFO] [stderr]       Adding regex-syntax v0.6.29 (available: v0.8.4)
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.59.0)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ddbeb9d7ccb0d7d29601ad4120d73420a69132af812c5d6bbec1565a20f29cf0
[INFO] running `Command { std: "docker" "start" "-a" "ddbeb9d7ccb0d7d29601ad4120d73420a69132af812c5d6bbec1565a20f29cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddbeb9d7ccb0d7d29601ad4120d73420a69132af812c5d6bbec1565a20f29cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddbeb9d7ccb0d7d29601ad4120d73420a69132af812c5d6bbec1565a20f29cf0", kill_on_drop: false }`
[INFO] [stdout] ddbeb9d7ccb0d7d29601ad4120d73420a69132af812c5d6bbec1565a20f29cf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8fc0a78c42b20b46a3aedaf581da0fb168efffb1b6c7f94fbde33987bcee6d03
[INFO] running `Command { std: "docker" "start" "-a" "8fc0a78c42b20b46a3aedaf581da0fb168efffb1b6c7f94fbde33987bcee6d03", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]    Compiling rustix v0.38.37
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking bitflags v2.6.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking example v1.1.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking fastrand v2.1.1
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling error-stack v0.4.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking tempfile v3.13.0
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking serdo v0.1.5-beta.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `send`
[INFO] [stdout]    --> src/undo_store.rs:480:14
[INFO] [stdout]     |
[INFO] [stdout] 480 | macro_rules! send {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `send`
[INFO] [stdout]    --> src/undo_store.rs:480:14
[INFO] [stdout]     |
[INFO] [stdout] 480 | macro_rules! send {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sub` is never constructed
[INFO] [stdout]     --> src/undo_store.rs:1394:19
[INFO] [stdout]      |
[INFO] [stdout] 1393 |     enum SumCmd {
[INFO] [stdout]      |          ------ variant in this enum
[INFO] [stdout] 1394 |         Add(i32), Sub(i32),
[INFO] [stdout]      |                   ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sub` is never used
[INFO] [stdout]     --> src/undo_store.rs:1427:12
[INFO] [stdout]      |
[INFO] [stdout] 1424 |     trait Model {
[INFO] [stdout]      |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 1427 |         fn sub(&mut self, to_sub: i32) -> Self::Resp;
[INFO] [stdout]      |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.87s
[INFO] running `Command { std: "docker" "inspect" "8fc0a78c42b20b46a3aedaf581da0fb168efffb1b6c7f94fbde33987bcee6d03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fc0a78c42b20b46a3aedaf581da0fb168efffb1b6c7f94fbde33987bcee6d03", kill_on_drop: false }`
[INFO] [stdout] 8fc0a78c42b20b46a3aedaf581da0fb168efffb1b6c7f94fbde33987bcee6d03