[INFO] fetching crate nibblecode 0.1.0...
[INFO] building nibblecode-0.1.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate nibblecode 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate nibblecode 0.1.0
[INFO] finished tweaking crates.io crate nibblecode 0.1.0
[INFO] tweaked toml for crates.io crate nibblecode 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nibblecode 0.1.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nibblecode 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b58199ab0847063f05e9f882d1f3b76be86b8ac1f5cfee3ea08a5c9c7ae7bd5
[INFO] running `Command { std: "docker" "start" "-a" "8b58199ab0847063f05e9f882d1f3b76be86b8ac1f5cfee3ea08a5c9c7ae7bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b58199ab0847063f05e9f882d1f3b76be86b8ac1f5cfee3ea08a5c9c7ae7bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b58199ab0847063f05e9f882d1f3b76be86b8ac1f5cfee3ea08a5c9c7ae7bd5", kill_on_drop: false }`
[INFO] [stdout] 8b58199ab0847063f05e9f882d1f3b76be86b8ac1f5cfee3ea08a5c9c7ae7bd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d3971869037915954ec67d65848b111936e416d94fc39a7eaed3dd497d994b4
[INFO] running `Command { std: "docker" "start" "-a" "4d3971869037915954ec67d65848b111936e416d94fc39a7eaed3dd497d994b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rend v0.5.2
[INFO] [stderr]    Compiling syn v2.0.102
[INFO] [stderr]    Compiling nibblecode_derive v0.1.0
[INFO] [stderr]    Compiling nibblecode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.42s
[INFO] running `Command { std: "docker" "inspect" "4d3971869037915954ec67d65848b111936e416d94fc39a7eaed3dd497d994b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d3971869037915954ec67d65848b111936e416d94fc39a7eaed3dd497d994b4", kill_on_drop: false }`
[INFO] [stdout] 4d3971869037915954ec67d65848b111936e416d94fc39a7eaed3dd497d994b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23ca113b21ae50c4a0a6c713cf9fee48ecca6446c4fb253ff8890c52f67a1f54
[INFO] running `Command { std: "docker" "start" "-a" "23ca113b21ae50c4a0a6c713cf9fee48ecca6446c4fb253ff8890c52f67a1f54", kill_on_drop: false }`
[INFO] [stderr]    Compiling nibblecode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `TupleFoo` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:386:14
[INFO] [stdout]     |
[INFO] [stdout] 386 |         pub struct TupleFoo<T = i32>(T);
[INFO] [stdout]     |                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructFoo` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:390:14
[INFO] [stdout]     |
[INFO] [stdout] 390 |         pub struct StructFoo<T = i32> {
[INFO] [stdout]     |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EnumFoo` is never used
[INFO] [stdout]    --> src/impls/mod.rs:396:12
[INFO] [stdout]     |
[INFO] [stdout] 396 |         pub enum EnumFoo<T = i32> {
[INFO] [stdout]     |                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Array` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:414:14
[INFO] [stdout]     |
[INFO] [stdout] 414 |         pub struct Array<T, const N: usize>([T; N]);
[INFO] [stdout]     |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Example` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:550:10
[INFO] [stdout]     |
[INFO] [stdout] 550 |         struct Example {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:558:10
[INFO] [stdout]     |
[INFO] [stdout] 558 |         struct Wrapper<T> {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Example` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:565:10
[INFO] [stdout]     |
[INFO] [stdout] 565 |         struct Example {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Test` is never constructed
[INFO] [stdout]    --> src/impls/mod.rs:576:10
[INFO] [stdout]     |
[INFO] [stdout] 576 |         struct Test<'a> {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.95s
[INFO] running `Command { std: "docker" "inspect" "23ca113b21ae50c4a0a6c713cf9fee48ecca6446c4fb253ff8890c52f67a1f54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23ca113b21ae50c4a0a6c713cf9fee48ecca6446c4fb253ff8890c52f67a1f54", kill_on_drop: false }`
[INFO] [stdout] 23ca113b21ae50c4a0a6c713cf9fee48ecca6446c4fb253ff8890c52f67a1f54