[INFO] cloning repository https://github.com/kframework/rust-metamath
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kframework/rust-metamath" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkframework%2Frust-metamath", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkframework%2Frust-metamath'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 783f79af7af48ecb893e77b62e5a8c20585485da
[INFO] checking kframework/rust-metamath against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkframework%2Frust-metamath" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kframework/rust-metamath 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 git repo https://github.com/kframework/rust-metamath
[INFO] finished tweaking git repo https://github.com/kframework/rust-metamath
[INFO] tweaked toml for git repo https://github.com/kframework/rust-metamath written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kframework/rust-metamath 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] 38022410a50bba7c54d21325e537b2b362314ff8ed6acf7b1b9f23deb0347afa
[INFO] running `Command { std: "docker" "start" "-a" "38022410a50bba7c54d21325e537b2b362314ff8ed6acf7b1b9f23deb0347afa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38022410a50bba7c54d21325e537b2b362314ff8ed6acf7b1b9f23deb0347afa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38022410a50bba7c54d21325e537b2b362314ff8ed6acf7b1b9f23deb0347afa", kill_on_drop: false }`
[INFO] [stdout] 38022410a50bba7c54d21325e537b2b362314ff8ed6acf7b1b9f23deb0347afa
[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] 1c27554ce894c81cdd391558c593b6539962e3357b458905ae29eff72e0b11ec
[INFO] running `Command { std: "docker" "start" "-a" "1c27554ce894c81cdd391558c593b6539962e3357b458905ae29eff72e0b11ec", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-metamath v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> src/main.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 438 |     let elapsed = now.elapsed();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 34  | impl MM {
[INFO] [stdout]     | ------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 316 |     fn print_stack(stack: &Vec<Statement>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> src/main.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 438 |     let elapsed = now.elapsed();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 34  | impl MM {
[INFO] [stdout]     | ------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 316 |     fn print_stack(stack: &Vec<Statement>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "1c27554ce894c81cdd391558c593b6539962e3357b458905ae29eff72e0b11ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c27554ce894c81cdd391558c593b6539962e3357b458905ae29eff72e0b11ec", kill_on_drop: false }`
[INFO] [stdout] 1c27554ce894c81cdd391558c593b6539962e3357b458905ae29eff72e0b11ec
[INFO] checking kframework/rust-metamath against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkframework%2Frust-metamath" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kframework/rust-metamath on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kframework/rust-metamath
[INFO] finished tweaking git repo https://github.com/kframework/rust-metamath
[INFO] tweaked toml for git repo https://github.com/kframework/rust-metamath written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kframework/rust-metamath 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c23f0cab8122a5ffb1cbb231fe1e64a6ec7ba337dfaf6f4e6d451a2dbe0fd454
[INFO] running `Command { std: "docker" "start" "-a" "c23f0cab8122a5ffb1cbb231fe1e64a6ec7ba337dfaf6f4e6d451a2dbe0fd454", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c23f0cab8122a5ffb1cbb231fe1e64a6ec7ba337dfaf6f4e6d451a2dbe0fd454", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c23f0cab8122a5ffb1cbb231fe1e64a6ec7ba337dfaf6f4e6d451a2dbe0fd454", kill_on_drop: false }`
[INFO] [stdout] c23f0cab8122a5ffb1cbb231fe1e64a6ec7ba337dfaf6f4e6d451a2dbe0fd454
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26b00b90ebb23835872199e0a6d7109178aaf1f7f3ac5572bbc36ffca5a3f82a
[INFO] running `Command { std: "docker" "start" "-a" "26b00b90ebb23835872199e0a6d7109178aaf1f7f3ac5572bbc36ffca5a3f82a", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-metamath v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> src/main.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 438 |     let elapsed = now.elapsed();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 34  | impl MM {
[INFO] [stdout]     | ------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 316 |     fn print_stack(stack: &Vec<Statement>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]    --> src/main.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 438 |     let elapsed = now.elapsed();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 34  | impl MM {
[INFO] [stdout]     | ------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 316 |     fn print_stack(stack: &Vec<Statement>) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "26b00b90ebb23835872199e0a6d7109178aaf1f7f3ac5572bbc36ffca5a3f82a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26b00b90ebb23835872199e0a6d7109178aaf1f7f3ac5572bbc36ffca5a3f82a", kill_on_drop: false }`
[INFO] [stdout] 26b00b90ebb23835872199e0a6d7109178aaf1f7f3ac5572bbc36ffca5a3f82a