[INFO] fetching crate rusttyc 0.5.0...
[INFO] checking rusttyc-0.5.0 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate rusttyc 0.5.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rusttyc 0.5.0 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rusttyc 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rusttyc 0.5.0
[INFO] tweaked toml for crates.io crate rusttyc 0.5.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate rusttyc 0.5.0 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c538189235d9bc4f6773d76a89e21229fb29e8053709845e153378a2083a5b38
[INFO] running `Command { std: "docker" "start" "-a" "c538189235d9bc4f6773d76a89e21229fb29e8053709845e153378a2083a5b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c538189235d9bc4f6773d76a89e21229fb29e8053709845e153378a2083a5b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c538189235d9bc4f6773d76a89e21229fb29e8053709845e153378a2083a5b38", kill_on_drop: false }`
[INFO] [stdout] c538189235d9bc4f6773d76a89e21229fb29e8053709845e153378a2083a5b38
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83aa265ad1e60a3bfc7982a174ca437344d0f14402f70b89e27df2297055e6ab
[INFO] running `Command { std: "docker" "start" "-a" "83aa265ad1e60a3bfc7982a174ca437344d0f14402f70b89e27df2297055e6ab", kill_on_drop: false }`
[INFO] [stderr]     Checking rusttyc v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/tests.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     PolyFn {
[INFO] [stdout]    |     ------ field in this variant
[INFO] [stdout] 90 |         name: &'static str,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/tests.rs:96:15
[INFO] [stdout]    |
[INFO] [stdout] 96 |     ConstBool(bool),
[INFO] [stdout]    |     --------- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 96 |     ConstBool(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Variable` is never constructed
[INFO] [stdout]   --> examples/parametrized_function.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Variable(usize);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> examples/parametrized_function.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     PolyFn {
[INFO] [stdout]    |     ------ field in this variant
[INFO] [stdout] 89 |         name: &'static str,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> examples/parametrized_function.rs:95:15
[INFO] [stdout]    |
[INFO] [stdout] 95 |     ConstBool(bool),
[INFO] [stdout]    |     --------- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 95 |     ConstBool(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> examples/parametrized_function.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |             &params;
[INFO] [stdout]     |             ^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 149 |             let _ = &params;
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "83aa265ad1e60a3bfc7982a174ca437344d0f14402f70b89e27df2297055e6ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83aa265ad1e60a3bfc7982a174ca437344d0f14402f70b89e27df2297055e6ab", kill_on_drop: false }`
[INFO] [stdout] 83aa265ad1e60a3bfc7982a174ca437344d0f14402f70b89e27df2297055e6ab