[INFO] fetching crate hanger 0.1.0...
[INFO] checking hanger-0.1.0 against master#2b112efcccf831c0e0fbaa6470047c7067f12801 for pr-150727-1
[INFO] extracting crate hanger 0.1.0 into /workspace/builds/worker-3-tc1/source
[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-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate hanger 0.1.0 on toolchain 2b112efcccf831c0e0fbaa6470047c7067f12801
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b112efcccf831c0e0fbaa6470047c7067f12801" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b112efcccf831c0e0fbaa6470047c7067f12801" "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: v1.0.105)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.43)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.114)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b112efcccf831c0e0fbaa6470047c7067f12801" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+2b112efcccf831c0e0fbaa6470047c7067f12801" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e62af44baaddd4492c4bb82a0fd7e0c297e79abd6df583e4013eda3598da1590
[INFO] running `Command { std: "docker" "start" "-a" "e62af44baaddd4492c4bb82a0fd7e0c297e79abd6df583e4013eda3598da1590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e62af44baaddd4492c4bb82a0fd7e0c297e79abd6df583e4013eda3598da1590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e62af44baaddd4492c4bb82a0fd7e0c297e79abd6df583e4013eda3598da1590", kill_on_drop: false }`
[INFO] [stdout] e62af44baaddd4492c4bb82a0fd7e0c297e79abd6df583e4013eda3598da1590
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+2b112efcccf831c0e0fbaa6470047c7067f12801" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2af23424208bb355d64e562bae4272f09dd3f7b0d8be5d7df742a9eb4048f9ac
[INFO] running `Command { std: "docker" "start" "-a" "2af23424208bb355d64e562bae4272f09dd3f7b0d8be5d7df742a9eb4048f9ac", 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]    Compiling 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.43s
[INFO] running `Command { std: "docker" "inspect" "2af23424208bb355d64e562bae4272f09dd3f7b0d8be5d7df742a9eb4048f9ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2af23424208bb355d64e562bae4272f09dd3f7b0d8be5d7df742a9eb4048f9ac", kill_on_drop: false }`
[INFO] [stdout] 2af23424208bb355d64e562bae4272f09dd3f7b0d8be5d7df742a9eb4048f9ac