[INFO] fetching crate hanger 0.1.0...
[INFO] checking hanger-0.1.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate hanger 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate hanger 0.1.0 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 hanger 0.1.0
[INFO] finished tweaking crates.io crate hanger 0.1.0
[INFO] tweaked toml for crates.io crate hanger 0.1.0 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]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.86)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.37)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.79)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (available: v0.2.6)
[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] 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] fecc78bb8843dbc4fc28ab7277c8dd8ab0cd5bf947973a2dea39816958aea09e
[INFO] running `Command { std: "docker" "start" "-a" "fecc78bb8843dbc4fc28ab7277c8dd8ab0cd5bf947973a2dea39816958aea09e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fecc78bb8843dbc4fc28ab7277c8dd8ab0cd5bf947973a2dea39816958aea09e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fecc78bb8843dbc4fc28ab7277c8dd8ab0cd5bf947973a2dea39816958aea09e", kill_on_drop: false }`
[INFO] [stdout] fecc78bb8843dbc4fc28ab7277c8dd8ab0cd5bf947973a2dea39816958aea09e
[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] 744e0a7cd104c5097973a597dfc2f10da14ff7588fa272ab1ceffe5f8d16a8a6
[INFO] running `Command { std: "docker" "start" "-a" "744e0a7cd104c5097973a597dfc2f10da14ff7588fa272ab1ceffe5f8d16a8a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking hanger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `b` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Before {
[INFO] [stdout]    |         ------ fields in this variant
[INFO] [stdout] 46 |             b: before,
[INFO] [stdout]    |             ^
[INFO] [stdout] 47 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         After {
[INFO] [stdout]    |         ----- fields in this variant
[INFO] [stdout] 51 |             a: after,
[INFO] [stdout]    |             ^
[INFO] [stdout] 52 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `b` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Before {
[INFO] [stdout]    |         ------ fields in this variant
[INFO] [stdout] 46 |             b: before,
[INFO] [stdout]    |             ^
[INFO] [stdout] 47 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         After {
[INFO] [stdout]    |         ----- fields in this variant
[INFO] [stdout] 51 |             a: after,
[INFO] [stdout]    |             ^
[INFO] [stdout] 52 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `b` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Before {
[INFO] [stdout]    |         ------ fields in this variant
[INFO] [stdout] 46 |             b: before,
[INFO] [stdout]    |             ^
[INFO] [stdout] 47 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `eq` are never read
[INFO] [stdout]   --> src/lib.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         After {
[INFO] [stdout]    |         ----- fields in this variant
[INFO] [stdout] 51 |             a: after,
[INFO] [stdout]    |             ^
[INFO] [stdout] 52 |             eq: syn::Token![=],
[INFO] [stdout]    |             ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.39s
[INFO] running `Command { std: "docker" "inspect" "744e0a7cd104c5097973a597dfc2f10da14ff7588fa272ab1ceffe5f8d16a8a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "744e0a7cd104c5097973a597dfc2f10da14ff7588fa272ab1ceffe5f8d16a8a6", kill_on_drop: false }`
[INFO] [stdout] 744e0a7cd104c5097973a597dfc2f10da14ff7588fa272ab1ceffe5f8d16a8a6