[INFO] cloning repository https://github.com/cabljac/my_markov
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cabljac/my_markov" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcabljac%2Fmy_markov", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcabljac%2Fmy_markov'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6118d0cda81793fe9b39f617a85a4024a3651222
[INFO] checking cabljac/my_markov against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcabljac%2Fmy_markov" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cabljac/my_markov 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/cabljac/my_markov
[INFO] finished tweaking git repo https://github.com/cabljac/my_markov
[INFO] tweaked toml for git repo https://github.com/cabljac/my_markov written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cabljac/my_markov 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 sprs v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 07bc3e7972bb944731298956ba368d00a51b52721dc05a0165279adc7a9c6cb2
[INFO] running `Command { std: "docker" "start" "-a" "07bc3e7972bb944731298956ba368d00a51b52721dc05a0165279adc7a9c6cb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07bc3e7972bb944731298956ba368d00a51b52721dc05a0165279adc7a9c6cb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07bc3e7972bb944731298956ba368d00a51b52721dc05a0165279adc7a9c6cb2", kill_on_drop: false }`
[INFO] [stdout] 07bc3e7972bb944731298956ba368d00a51b52721dc05a0165279adc7a9c6cb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a47694ed5470db985189481c4be7f803a14bff8f56f58e58a3921aca9bfe8b19
[INFO] running `Command { std: "docker" "start" "-a" "a47694ed5470db985189481c4be7f803a14bff8f56f58e58a3921aca9bfe8b19", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.116
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking ndarray v0.15.4
[INFO] [stderr]     Checking sprs v0.11.0
[INFO] [stderr]     Checking my_markov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` 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 9.62s
[INFO] running `Command { std: "docker" "inspect" "a47694ed5470db985189481c4be7f803a14bff8f56f58e58a3921aca9bfe8b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a47694ed5470db985189481c4be7f803a14bff8f56f58e58a3921aca9bfe8b19", kill_on_drop: false }`
[INFO] [stdout] a47694ed5470db985189481c4be7f803a14bff8f56f58e58a3921aca9bfe8b19
[INFO] checking cabljac/my_markov against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcabljac%2Fmy_markov" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cabljac/my_markov 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/cabljac/my_markov
[INFO] finished tweaking git repo https://github.com/cabljac/my_markov
[INFO] tweaked toml for git repo https://github.com/cabljac/my_markov written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cabljac/my_markov 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1ef8deb5e42de09567f200f36c5532c66c8de96bb1f4915b220cf7d8d8b0a9e6
[INFO] running `Command { std: "docker" "start" "-a" "1ef8deb5e42de09567f200f36c5532c66c8de96bb1f4915b220cf7d8d8b0a9e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ef8deb5e42de09567f200f36c5532c66c8de96bb1f4915b220cf7d8d8b0a9e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ef8deb5e42de09567f200f36c5532c66c8de96bb1f4915b220cf7d8d8b0a9e6", kill_on_drop: false }`
[INFO] [stdout] 1ef8deb5e42de09567f200f36c5532c66c8de96bb1f4915b220cf7d8d8b0a9e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] f5bcffc1c87aa58b833376c6888a51bb3281527f10500e005b810132893f4653
[INFO] running `Command { std: "docker" "start" "-a" "f5bcffc1c87aa58b833376c6888a51bb3281527f10500e005b810132893f4653", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.116
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking ndarray v0.15.4
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking sprs v0.11.0
[INFO] [stderr]     Checking my_markov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` 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 9.56s
[INFO] running `Command { std: "docker" "inspect" "f5bcffc1c87aa58b833376c6888a51bb3281527f10500e005b810132893f4653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5bcffc1c87aa58b833376c6888a51bb3281527f10500e005b810132893f4653", kill_on_drop: false }`
[INFO] [stdout] f5bcffc1c87aa58b833376c6888a51bb3281527f10500e005b810132893f4653