[INFO] cloning repository https://github.com/david-a-wheeler/metamath-knife
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/david-a-wheeler/metamath-knife" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-a-wheeler%2Fmetamath-knife", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-a-wheeler%2Fmetamath-knife'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d63e26b5ca449f187214d3421fe5440725c331f8
[INFO] checking david-a-wheeler/metamath-knife against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-a-wheeler%2Fmetamath-knife" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/david-a-wheeler/metamath-knife on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/david-a-wheeler/metamath-knife
[INFO] finished tweaking git repo https://github.com/david-a-wheeler/metamath-knife
[INFO] tweaked toml for git repo https://github.com/david-a-wheeler/metamath-knife written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/david-a-wheeler/metamath-knife 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2df90964f3a30546c8524006dc01392630b8358596bac397f75154612f9c8e03
[INFO] running `Command { std: "docker" "start" "-a" "2df90964f3a30546c8524006dc01392630b8358596bac397f75154612f9c8e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2df90964f3a30546c8524006dc01392630b8358596bac397f75154612f9c8e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2df90964f3a30546c8524006dc01392630b8358596bac397f75154612f9c8e03", kill_on_drop: false }`
[INFO] [stdout] 2df90964f3a30546c8524006dc01392630b8358596bac397f75154612f9c8e03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c817441676bdc54cfedeb6d66f8ad248afcedda747bdefe6b34c71f9136d030
[INFO] running `Command { std: "docker" "start" "-a" "1c817441676bdc54cfedeb6d66f8ad248afcedda747bdefe6b34c71f9136d030", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling time-core v0.1.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking yansi-term v0.1.2
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking typed-arena v2.0.2
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]     Checking annotate-snippets v0.9.1
[INFO] [stderr]     Checking itertools v0.12.0
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking filetime v0.2.21
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking time v0.3.21
[INFO] [stderr]     Checking regex v1.8.3
[INFO] [stderr]     Checking simple_logger v1.16.0
[INFO] [stderr]     Checking metamath-rs v0.3.6 (/opt/rustwide/workdir/metamath-rs)
[INFO] [stderr]     Checking metamath-knife v0.3.6 (/opt/rustwide/workdir/metamath-knife)
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "1c817441676bdc54cfedeb6d66f8ad248afcedda747bdefe6b34c71f9136d030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c817441676bdc54cfedeb6d66f8ad248afcedda747bdefe6b34c71f9136d030", kill_on_drop: false }`
[INFO] [stdout] 1c817441676bdc54cfedeb6d66f8ad248afcedda747bdefe6b34c71f9136d030
[INFO] checking david-a-wheeler/metamath-knife against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavid-a-wheeler%2Fmetamath-knife" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/david-a-wheeler/metamath-knife on toolchain 047472f299946caf090d1b5608ae4bd9f0416256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/david-a-wheeler/metamath-knife
[INFO] finished tweaking git repo https://github.com/david-a-wheeler/metamath-knife
[INFO] tweaked toml for git repo https://github.com/david-a-wheeler/metamath-knife written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/david-a-wheeler/metamath-knife 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c41cd52b49586ebf3a86bdbc2dda8839b6014ed9ae8198437aa47bb3c49a161c
[INFO] running `Command { std: "docker" "start" "-a" "c41cd52b49586ebf3a86bdbc2dda8839b6014ed9ae8198437aa47bb3c49a161c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c41cd52b49586ebf3a86bdbc2dda8839b6014ed9ae8198437aa47bb3c49a161c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c41cd52b49586ebf3a86bdbc2dda8839b6014ed9ae8198437aa47bb3c49a161c", kill_on_drop: false }`
[INFO] [stdout] c41cd52b49586ebf3a86bdbc2dda8839b6014ed9ae8198437aa47bb3c49a161c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Ddereferencing_mut_binding" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd7a8665781ae68980e3c6233c98a6cc1048523c0152d9cd162b29041074d8c8
[INFO] running `Command { std: "docker" "start" "-a" "dd7a8665781ae68980e3c6233c98a6cc1048523c0152d9cd162b29041074d8c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling time-core v0.1.1
[INFO] [stderr]     Checking yansi-term v0.1.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking typed-arena v2.0.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]     Checking annotate-snippets v0.9.1
[INFO] [stderr]     Checking itertools v0.12.0
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking filetime v0.2.21
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking time v0.3.21
[INFO] [stderr]     Checking regex v1.8.3
[INFO] [stderr]     Checking simple_logger v1.16.0
[INFO] [stderr]     Checking metamath-rs v0.3.6 (/opt/rustwide/workdir/metamath-rs)
[INFO] [stdout] error: dereferencing `mut` binding
[INFO] [stdout]     --> metamath-rs/src/grammar.rs:1189:16
[INFO] [stdout]      |
[INFO] [stdout] 1189 |         let Ok(mut last_token) = symbol_enum
[INFO] [stdout]      |                ^^^^^^^^^^^^^^ `mut` dereferences the type of this binding
[INFO] [stdout]      |
[INFO] [stdout] help: this will change in edition 2024
[INFO] [stdout]     --> metamath-rs/src/grammar.rs:1189:16
[INFO] [stdout]      |
[INFO] [stdout] 1189 |         let Ok(mut last_token) = symbol_enum
[INFO] [stdout]      |                ^^^^^^^^^^^^^^
[INFO] [stdout]      = note: requested on the command line with `-D dereferencing-mut-binding`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: dereferencing `mut` binding
[INFO] [stdout]     --> metamath-rs/src/grammar.rs:1189:16
[INFO] [stdout]      |
[INFO] [stdout] 1189 |         let Ok(mut last_token) = symbol_enum
[INFO] [stdout]      |                ^^^^^^^^^^^^^^ `mut` dereferences the type of this binding
[INFO] [stdout]      |
[INFO] [stdout] help: this will change in edition 2024
[INFO] [stdout]     --> metamath-rs/src/grammar.rs:1189:16
[INFO] [stdout]      |
[INFO] [stdout] 1189 |         let Ok(mut last_token) = symbol_enum
[INFO] [stdout]      |                ^^^^^^^^^^^^^^
[INFO] [stdout]      = note: requested on the command line with `-D dereferencing-mut-binding`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metamath-rs` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metamath-rs` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "dd7a8665781ae68980e3c6233c98a6cc1048523c0152d9cd162b29041074d8c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd7a8665781ae68980e3c6233c98a6cc1048523c0152d9cd162b29041074d8c8", kill_on_drop: false }`
[INFO] [stdout] dd7a8665781ae68980e3c6233c98a6cc1048523c0152d9cd162b29041074d8c8