[INFO] fetching crate twiggy-traits 0.7.0...
[INFO] testing twiggy-traits-0.7.0 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate twiggy-traits 0.7.0 into /workspace/builds/worker-71/source
[INFO] validating manifest of crates.io crate twiggy-traits 0.7.0 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate twiggy-traits 0.7.0
[INFO] finished tweaking crates.io crate twiggy-traits 0.7.0
[INFO] tweaked toml for crates.io crate twiggy-traits 0.7.0 written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpp_demangle v0.3.5
[INFO] [stderr]   Downloaded frozen v1.0.0
[INFO] [stderr]   Downloaded twiggy-ir v0.7.0
[INFO] [stderr]   Downloaded wasmparser v0.35.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0f6d61f1cc5d0365f3eb2b33f3490270bb2a8f1c8513a6e76e2743454826759
[INFO] running `Command { std: "docker" "start" "-a" "d0f6d61f1cc5d0365f3eb2b33f3490270bb2a8f1c8513a6e76e2743454826759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0f6d61f1cc5d0365f3eb2b33f3490270bb2a8f1c8513a6e76e2743454826759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0f6d61f1cc5d0365f3eb2b33f3490270bb2a8f1c8513a6e76e2743454826759", kill_on_drop: false }`
[INFO] [stdout] d0f6d61f1cc5d0365f3eb2b33f3490270bb2a8f1c8513a6e76e2743454826759
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa1b74d048a98b8bfb520a61dd8fc77b6f7f2dfeb5ce1f2bda4182268a551c79
[INFO] running `Command { std: "docker" "start" "-a" "fa1b74d048a98b8bfb520a61dd8fc77b6f7f2dfeb5ce1f2bda4182268a551c79", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling gimli v0.26.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.4.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling frozen v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling wasmparser v0.35.3
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling petgraph v0.6.0
[INFO] [stderr]    Compiling object v0.27.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling twiggy-ir v0.7.0
[INFO] [stderr]    Compiling twiggy-traits v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:225:9
[INFO] [stdout]     |
[INFO] [stdout] 225 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.98s
[INFO] running `Command { std: "docker" "inspect" "fa1b74d048a98b8bfb520a61dd8fc77b6f7f2dfeb5ce1f2bda4182268a551c79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa1b74d048a98b8bfb520a61dd8fc77b6f7f2dfeb5ce1f2bda4182268a551c79", kill_on_drop: false }`
[INFO] [stdout] fa1b74d048a98b8bfb520a61dd8fc77b6f7f2dfeb5ce1f2bda4182268a551c79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca65ff3f3ec004e6f32f9982e266f3a32caeec09a2aa467b5fbf2bdec4ad9520
[INFO] running `Command { std: "docker" "start" "-a" "ca65ff3f3ec004e6f32f9982e266f3a32caeec09a2aa467b5fbf2bdec4ad9520", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling twiggy-traits v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:225:9
[INFO] [stdout]     |
[INFO] [stdout] 225 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:224:9
[INFO] [stdout]     |
[INFO] [stdout] 224 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:225:9
[INFO] [stdout]     |
[INFO] [stdout] 225 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "ca65ff3f3ec004e6f32f9982e266f3a32caeec09a2aa467b5fbf2bdec4ad9520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca65ff3f3ec004e6f32f9982e266f3a32caeec09a2aa467b5fbf2bdec4ad9520", kill_on_drop: false }`
[INFO] [stdout] ca65ff3f3ec004e6f32f9982e266f3a32caeec09a2aa467b5fbf2bdec4ad9520
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6f9963267d6c65ed36649c5566504342893d99e60673896c72f2c03ebdaaadd5
[INFO] running `Command { std: "docker" "start" "-a" "6f9963267d6c65ed36649c5566504342893d99e60673896c72f2c03ebdaaadd5", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `items`
[INFO] [stderr]    --> traits.rs:224:9
[INFO] [stderr]     |
[INFO] [stderr] 224 |         items: &ir::Items,
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `destination`
[INFO] [stderr]    --> traits.rs:225:9
[INFO] [stderr]     |
[INFO] [stderr] 225 |         destination: &mut dyn io::Write,
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stderr] 
[INFO] [stderr] warning: `twiggy-traits` (lib) generated 2 warnings
[INFO] [stderr] warning: `twiggy-traits` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/twiggy_traits-689913f6cbd9e442)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test size_of_error_is_one_word ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests twiggy-traits
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6f9963267d6c65ed36649c5566504342893d99e60673896c72f2c03ebdaaadd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f9963267d6c65ed36649c5566504342893d99e60673896c72f2c03ebdaaadd5", kill_on_drop: false }`
[INFO] [stdout] 6f9963267d6c65ed36649c5566504342893d99e60673896c72f2c03ebdaaadd5