[INFO] cloning repository https://github.com/Ran4/mtg-cardlisting-detect
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ran4/mtg-cardlisting-detect" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRan4%2Fmtg-cardlisting-detect", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRan4%2Fmtg-cardlisting-detect'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b995bbf512828d69622e3ef581b47eaf770d9f42
[INFO] checking Ran4/mtg-cardlisting-detect against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRan4%2Fmtg-cardlisting-detect" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ran4/mtg-cardlisting-detect on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Ran4/mtg-cardlisting-detect
[INFO] finished tweaking git repo https://github.com/Ran4/mtg-cardlisting-detect
[INFO] tweaked toml for git repo https://github.com/Ran4/mtg-cardlisting-detect written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Ran4/mtg-cardlisting-detect 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v2.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a158d39581c807e651db185bcfb272d8c8740225cc25b2581a1241ebe442d85c
[INFO] running `Command { std: "docker" "start" "-a" "a158d39581c807e651db185bcfb272d8c8740225cc25b2581a1241ebe442d85c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a158d39581c807e651db185bcfb272d8c8740225cc25b2581a1241ebe442d85c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a158d39581c807e651db185bcfb272d8c8740225cc25b2581a1241ebe442d85c", kill_on_drop: false }`
[INFO] [stdout] a158d39581c807e651db185bcfb272d8c8740225cc25b2581a1241ebe442d85c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 057ffa46be486324323d901ab5eaeed0ad4d6931ae2690e6194671353d4f2ee9
[INFO] running `Command { std: "docker" "start" "-a" "057ffa46be486324323d901ab5eaeed0ad4d6931ae2690e6194671353d4f2ee9", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking mdiff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&usize` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:46:53
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .max_by_key(|(_format, count)| count.clone())
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&usize` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:46:53
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .max_by_key(|(_format, count)| count.clone())
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `Command { std: "docker" "inspect" "057ffa46be486324323d901ab5eaeed0ad4d6931ae2690e6194671353d4f2ee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "057ffa46be486324323d901ab5eaeed0ad4d6931ae2690e6194671353d4f2ee9", kill_on_drop: false }`
[INFO] [stdout] 057ffa46be486324323d901ab5eaeed0ad4d6931ae2690e6194671353d4f2ee9
[INFO] checking Ran4/mtg-cardlisting-detect against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRan4%2Fmtg-cardlisting-detect" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ran4/mtg-cardlisting-detect on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Ran4/mtg-cardlisting-detect
[INFO] finished tweaking git repo https://github.com/Ran4/mtg-cardlisting-detect
[INFO] tweaked toml for git repo https://github.com/Ran4/mtg-cardlisting-detect written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Ran4/mtg-cardlisting-detect 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3f10346c45aeba3ce4302bdd0ffdf855e0f9e6e2e882fc416f0bdd6260cdd95
[INFO] running `Command { std: "docker" "start" "-a" "a3f10346c45aeba3ce4302bdd0ffdf855e0f9e6e2e882fc416f0bdd6260cdd95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3f10346c45aeba3ce4302bdd0ffdf855e0f9e6e2e882fc416f0bdd6260cdd95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3f10346c45aeba3ce4302bdd0ffdf855e0f9e6e2e882fc416f0bdd6260cdd95", kill_on_drop: false }`
[INFO] [stdout] a3f10346c45aeba3ce4302bdd0ffdf855e0f9e6e2e882fc416f0bdd6260cdd95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a95cb1fac0f3ffba453dc3023b938cf70e97f52e21336059aad1e7675ca11ab
[INFO] running `Command { std: "docker" "start" "-a" "2a95cb1fac0f3ffba453dc3023b938cf70e97f52e21336059aad1e7675ca11ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking mdiff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&usize` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:46:53
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .max_by_key(|(_format, count)| count.clone())
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&usize` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:46:53
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .max_by_key(|(_format, count)| count.clone())
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `Command { std: "docker" "inspect" "2a95cb1fac0f3ffba453dc3023b938cf70e97f52e21336059aad1e7675ca11ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a95cb1fac0f3ffba453dc3023b938cf70e97f52e21336059aad1e7675ca11ab", kill_on_drop: false }`
[INFO] [stdout] 2a95cb1fac0f3ffba453dc3023b938cf70e97f52e21336059aad1e7675ca11ab