[INFO] fetching crate overloadable 0.4.1...
[INFO] checking overloadable-0.4.1 against master#f42f19b6d3d785a74dbe57aa395b6c288437dd51 for pr-107123-1
[INFO] extracting crate overloadable 0.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate overloadable 0.4.1 on toolchain f42f19b6d3d785a74dbe57aa395b6c288437dd51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate overloadable 0.4.1
[INFO] finished tweaking crates.io crate overloadable 0.4.1
[INFO] tweaked toml for crates.io crate overloadable 0.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddba945597999088a7350d8f594421d967b7dff5ae0c479eafa509d9081fc375
[INFO] running `Command { std: "docker" "start" "-a" "ddba945597999088a7350d8f594421d967b7dff5ae0c479eafa509d9081fc375", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddba945597999088a7350d8f594421d967b7dff5ae0c479eafa509d9081fc375", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddba945597999088a7350d8f594421d967b7dff5ae0c479eafa509d9081fc375", kill_on_drop: false }`
[INFO] [stdout] ddba945597999088a7350d8f594421d967b7dff5ae0c479eafa509d9081fc375
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 205a2b575226f47d50b1bef68dfa1c256d5cd1b90cc0332447b9744ed8d543f0
[INFO] running `Command { std: "docker" "start" "-a" "205a2b575226f47d50b1bef68dfa1c256d5cd1b90cc0332447b9744ed8d543f0", 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 overloadable v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> tests/default.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn(&self) -> usize {1}
[INFO] [stdout]    |                        ^ ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 38 -     fn(&self) -> usize {1}
[INFO] [stdout] 38 +     fn(&self) -> usize 1
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `B` is never constructed
[INFO] [stdout]   --> tests/default.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | enum Foo {
[INFO] [stdout]    |      --- variant in this enum
[INFO] [stdout] 44 |     A,
[INFO] [stdout] 45 |     B,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Foo` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.80s
[INFO] running `Command { std: "docker" "inspect" "205a2b575226f47d50b1bef68dfa1c256d5cd1b90cc0332447b9744ed8d543f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "205a2b575226f47d50b1bef68dfa1c256d5cd1b90cc0332447b9744ed8d543f0", kill_on_drop: false }`
[INFO] [stdout] 205a2b575226f47d50b1bef68dfa1c256d5cd1b90cc0332447b9744ed8d543f0