[INFO] fetching crate pear 0.2.9...
[INFO] checking pear-0.2.9 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate pear 0.2.9 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate pear 0.2.9 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 pear 0.2.9
[INFO] finished tweaking crates.io crate pear 0.2.9
[INFO] tweaked toml for crates.io crate pear 0.2.9 written to /workspace/builds/worker-6-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 9 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] [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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9d15cc6c635bb2757bd73b8b5db59433fff22a7b2891e0720998f29eb54deabe
[INFO] running `Command { std: "docker" "start" "-a" "9d15cc6c635bb2757bd73b8b5db59433fff22a7b2891e0720998f29eb54deabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d15cc6c635bb2757bd73b8b5db59433fff22a7b2891e0720998f29eb54deabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d15cc6c635bb2757bd73b8b5db59433fff22a7b2891e0720998f29eb54deabe", kill_on_drop: false }`
[INFO] [stdout] 9d15cc6c635bb2757bd73b8b5db59433fff22a7b2891e0720998f29eb54deabe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6333840dd1bf08117f91b1bcde1d2a7c39a48f73e22f5c3e077a55c86d306a9f
[INFO] running `Command { std: "docker" "start" "-a" "6333840dd1bf08117f91b1bcde1d2a7c39a48f73e22f5c3e077a55c86d306a9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]     Checking inlinable_string v0.1.15
[INFO] [stderr]    Compiling pear_codegen v0.2.9
[INFO] [stderr]     Checking pear v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/custom_expected.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Expected(Expected<Text<'a>>),
[INFO] [stdout]    |     -------- ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Expected(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `message` and `second` are never read
[INFO] [stdout]   --> tests/custom_expected.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Other {
[INFO] [stdout]    |     ----- fields in this variant
[INFO] [stdout] 12 |         message: Cow<'static, str>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 13 |         second: Option<Cow<'static, str>>
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.31s
[INFO] running `Command { std: "docker" "inspect" "6333840dd1bf08117f91b1bcde1d2a7c39a48f73e22f5c3e077a55c86d306a9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6333840dd1bf08117f91b1bcde1d2a7c39a48f73e22f5c3e077a55c86d306a9f", kill_on_drop: false }`
[INFO] [stdout] 6333840dd1bf08117f91b1bcde1d2a7c39a48f73e22f5c3e077a55c86d306a9f