[INFO] cloning repository https://github.com/schn4v1d/mypl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/schn4v1d/mypl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschn4v1d%2Fmypl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschn4v1d%2Fmypl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc2e9c070544f2e78eb9a106f4a48151a1a9b722
[INFO] checking schn4v1d/mypl against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschn4v1d%2Fmypl" "/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/schn4v1d/mypl 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/schn4v1d/mypl
[INFO] finished tweaking git repo https://github.com/schn4v1d/mypl
[INFO] tweaked toml for git repo https://github.com/schn4v1d/mypl written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/schn4v1d/mypl 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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8840896c0c29bfc3f129a5b3fee8ca01690aaf8e77f31fa01feba7c1bb24ce03
[INFO] running `Command { std: "docker" "start" "-a" "8840896c0c29bfc3f129a5b3fee8ca01690aaf8e77f31fa01feba7c1bb24ce03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8840896c0c29bfc3f129a5b3fee8ca01690aaf8e77f31fa01feba7c1bb24ce03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8840896c0c29bfc3f129a5b3fee8ca01690aaf8e77f31fa01feba7c1bb24ce03", kill_on_drop: false }`
[INFO] [stdout] 8840896c0c29bfc3f129a5b3fee8ca01690aaf8e77f31fa01feba7c1bb24ce03
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f0a8d28d6f06c91b35d71f0620012460739577080cba3d6f5c817ee03f8c748
[INFO] running `Command { std: "docker" "start" "-a" "2f0a8d28d6f06c91b35d71f0620012460739577080cba3d6f5c817ee03f8c748", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling beef v0.5.1
[INFO] [stderr]     Checking combine v4.6.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking mypl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `H`, `Jot`, `Dot`, `Ref`, and `Idx` are never constructed
[INFO] [stdout]   --> src/eval_tree/binding.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | enum BindingType {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 8  |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Jot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     Ref,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     Idx,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `H`, `Jot`, `Dot`, `Ref`, and `Idx` are never constructed
[INFO] [stdout]   --> src/eval_tree/binding.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | enum BindingType {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 8  |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Jot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     Ref,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     Idx,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 8.88s
[INFO] running `Command { std: "docker" "inspect" "2f0a8d28d6f06c91b35d71f0620012460739577080cba3d6f5c817ee03f8c748", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f0a8d28d6f06c91b35d71f0620012460739577080cba3d6f5c817ee03f8c748", kill_on_drop: false }`
[INFO] [stdout] 2f0a8d28d6f06c91b35d71f0620012460739577080cba3d6f5c817ee03f8c748
[INFO] checking schn4v1d/mypl against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschn4v1d%2Fmypl" "/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/schn4v1d/mypl 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/schn4v1d/mypl
[INFO] finished tweaking git repo https://github.com/schn4v1d/mypl
[INFO] tweaked toml for git repo https://github.com/schn4v1d/mypl written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/schn4v1d/mypl 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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 005cb5e2758285c8d067a71d548faa1323e865dbb002b4a96ee7561c7c5436cd
[INFO] running `Command { std: "docker" "start" "-a" "005cb5e2758285c8d067a71d548faa1323e865dbb002b4a96ee7561c7c5436cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "005cb5e2758285c8d067a71d548faa1323e865dbb002b4a96ee7561c7c5436cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "005cb5e2758285c8d067a71d548faa1323e865dbb002b4a96ee7561c7c5436cd", kill_on_drop: false }`
[INFO] [stdout] 005cb5e2758285c8d067a71d548faa1323e865dbb002b4a96ee7561c7c5436cd
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 969515d0ba9224d9fe22c278b4705f5a5e48ae28f7ce51aa0d31a449603b619c
[INFO] running `Command { std: "docker" "start" "-a" "969515d0ba9224d9fe22c278b4705f5a5e48ae28f7ce51aa0d31a449603b619c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.94
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling beef v0.5.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking combine v4.6.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking mypl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `H`, `Jot`, `Dot`, `Ref`, and `Idx` are never constructed
[INFO] [stdout]   --> src/eval_tree/binding.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | enum BindingType {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 8  |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Jot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     Ref,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     Idx,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `H`, `Jot`, `Dot`, `Ref`, and `Idx` are never constructed
[INFO] [stdout]   --> src/eval_tree/binding.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | enum BindingType {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 8  |     H,
[INFO] [stdout]    |     ^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Jot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     Ref,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     Idx,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 6.98s
[INFO] running `Command { std: "docker" "inspect" "969515d0ba9224d9fe22c278b4705f5a5e48ae28f7ce51aa0d31a449603b619c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "969515d0ba9224d9fe22c278b4705f5a5e48ae28f7ce51aa0d31a449603b619c", kill_on_drop: false }`
[INFO] [stdout] 969515d0ba9224d9fe22c278b4705f5a5e48ae28f7ce51aa0d31a449603b619c