[INFO] fetching crate railsgun 0.1.4...
[INFO] checking railsgun-0.1.4 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate railsgun 0.1.4 into /workspace/builds/worker-33/source
[INFO] validating manifest of crates.io crate railsgun 0.1.4 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate railsgun 0.1.4
[INFO] finished tweaking crates.io crate railsgun 0.1.4
[INFO] tweaked toml for crates.io crate railsgun 0.1.4 written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50d3c78212f57be8186c932312cdbe7124745de36abeb1c3ce13d11a5ec332b9
[INFO] running `Command { std: "docker" "start" "-a" "50d3c78212f57be8186c932312cdbe7124745de36abeb1c3ce13d11a5ec332b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50d3c78212f57be8186c932312cdbe7124745de36abeb1c3ce13d11a5ec332b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50d3c78212f57be8186c932312cdbe7124745de36abeb1c3ce13d11a5ec332b9", kill_on_drop: false }`
[INFO] [stdout] 50d3c78212f57be8186c932312cdbe7124745de36abeb1c3ce13d11a5ec332b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac5c2479bc8f9b3cb14cbd573fb34b9e4bf88ea6a14b0d7bd988ecbcb2ec09fa
[INFO] running `Command { std: "docker" "start" "-a" "ac5c2479bc8f9b3cb14cbd573fb34b9e4bf88ea6a14b0d7bd988ecbcb2ec09fa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking railsgun v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:165:1
[INFO] [stdout]     |
[INFO] [stdout] 165 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:165:1
[INFO] [stdout]     |
[INFO] [stdout] 165 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/async_result.rs:886:23
[INFO] [stdout]     |
[INFO] [stdout] 886 |             Err(_) => unsafe { hint::unreachable_unchecked() },
[INFO] [stdout]     |                       ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/async_result.rs:922:22
[INFO] [stdout]     |
[INFO] [stdout] 922 |             Ok(_) => unsafe { hint::unreachable_unchecked() },
[INFO] [stdout]     |                      ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/async_result.rs:1842:35
[INFO] [stdout]      |
[INFO] [stdout] 1842 |         assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);
[INFO] [stdout]      |                                   ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/async_result.rs:1845:35
[INFO] [stdout]      |
[INFO] [stdout] 1845 |         assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
[INFO] [stdout]      |                                   ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/async_result.rs:886:23
[INFO] [stdout]     |
[INFO] [stdout] 886 |             Err(_) => unsafe { hint::unreachable_unchecked() },
[INFO] [stdout]     |                       ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/async_result.rs:922:22
[INFO] [stdout]     |
[INFO] [stdout] 922 |             Ok(_) => unsafe { hint::unreachable_unchecked() },
[INFO] [stdout]     |                      ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.22s
[INFO] running `Command { std: "docker" "inspect" "ac5c2479bc8f9b3cb14cbd573fb34b9e4bf88ea6a14b0d7bd988ecbcb2ec09fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac5c2479bc8f9b3cb14cbd573fb34b9e4bf88ea6a14b0d7bd988ecbcb2ec09fa", kill_on_drop: false }`
[INFO] [stdout] ac5c2479bc8f9b3cb14cbd573fb34b9e4bf88ea6a14b0d7bd988ecbcb2ec09fa