[INFO] fetching crate stack-machine 0.1.0...
[INFO] testing stack-machine-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate stack-machine 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate stack-machine 0.1.0
[INFO] finished tweaking crates.io crate stack-machine 0.1.0
[INFO] tweaked toml for crates.io crate stack-machine 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate stack-machine 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stack-machine 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" "+1.90.0" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb85a1f8c13f687ec403fb37a93b461363f008b36dff6f0c40100f2ffd9288ce
[INFO] running `Command { std: "docker" "start" "-a" "eb85a1f8c13f687ec403fb37a93b461363f008b36dff6f0c40100f2ffd9288ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb85a1f8c13f687ec403fb37a93b461363f008b36dff6f0c40100f2ffd9288ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb85a1f8c13f687ec403fb37a93b461363f008b36dff6f0c40100f2ffd9288ce", kill_on_drop: false }`
[INFO] [stdout] eb85a1f8c13f687ec403fb37a93b461363f008b36dff6f0c40100f2ffd9288ce
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be03b94221479fd5882e4ee1a7c7ae8aa4f47119d995a2010b12c7afe5eb0d3b
[INFO] running `Command { std: "docker" "start" "-a" "be03b94221479fd5882e4ee1a7c7ae8aa4f47119d995a2010b12c7afe5eb0d3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `mut1_err` is never used
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | trait SpecialStack {
[INFO] [stdout]    |       ------------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "be03b94221479fd5882e4ee1a7c7ae8aa4f47119d995a2010b12c7afe5eb0d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be03b94221479fd5882e4ee1a7c7ae8aa4f47119d995a2010b12c7afe5eb0d3b", kill_on_drop: false }`
[INFO] [stdout] be03b94221479fd5882e4ee1a7c7ae8aa4f47119d995a2010b12c7afe5eb0d3b
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8376fdc84190d5ee76e61f9b49bebbb71c441d4e265bc98887997f40e92eefd
[INFO] running `Command { std: "docker" "start" "-a" "c8376fdc84190d5ee76e61f9b49bebbb71c441d4e265bc98887997f40e92eefd", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `mut1_err` is never used
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | trait SpecialStack {
[INFO] [stdout]    |       ------------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "c8376fdc84190d5ee76e61f9b49bebbb71c441d4e265bc98887997f40e92eefd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8376fdc84190d5ee76e61f9b49bebbb71c441d4e265bc98887997f40e92eefd", kill_on_drop: false }`
[INFO] [stdout] c8376fdc84190d5ee76e61f9b49bebbb71c441d4e265bc98887997f40e92eefd
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 130f7b8e81f2e6756a01b17f12be1caa0cd3a22ce96cda22c56a6e1051d88b89
[INFO] running `Command { std: "docker" "start" "-a" "130f7b8e81f2e6756a01b17f12be1caa0cd3a22ce96cda22c56a6e1051d88b89", kill_on_drop: false }`
[INFO] [stderr] warning: method `mut1_err` is never used
[INFO] [stderr]   --> src/main.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | trait SpecialStack {
[INFO] [stderr]    |       ------------ method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `stack-machine` (bin "stack-machine" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/stack_machine-48e1c1943dbca542)
[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" "130f7b8e81f2e6756a01b17f12be1caa0cd3a22ce96cda22c56a6e1051d88b89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "130f7b8e81f2e6756a01b17f12be1caa0cd3a22ce96cda22c56a6e1051d88b89", kill_on_drop: false }`
[INFO] [stdout] 130f7b8e81f2e6756a01b17f12be1caa0cd3a22ce96cda22c56a6e1051d88b89