[INFO] fetching crate diman_unit_system 0.3.0...
[INFO] checking diman_unit_system-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate diman_unit_system 0.3.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate diman_unit_system 0.3.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate diman_unit_system 0.3.0
[INFO] finished tweaking crates.io crate diman_unit_system 0.3.0
[INFO] tweaked toml for crates.io crate diman_unit_system 0.3.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded diman_derive_verify v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2da9a9cad76ad4a50b148f01065988d36bfa05d44cdc8e307405eca583a8d96d
[INFO] running `Command { std: "docker" "start" "-a" "2da9a9cad76ad4a50b148f01065988d36bfa05d44cdc8e307405eca583a8d96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2da9a9cad76ad4a50b148f01065988d36bfa05d44cdc8e307405eca583a8d96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2da9a9cad76ad4a50b148f01065988d36bfa05d44cdc8e307405eca583a8d96d", kill_on_drop: false }`
[INFO] [stdout] 2da9a9cad76ad4a50b148f01065988d36bfa05d44cdc8e307405eca583a8d96d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69a0f8e73ac74d6085b5a9cd1041b69a94091a22e17e2780f8008aea32bd92e7
[INFO] running `Command { std: "docker" "start" "-a" "69a0f8e73ac74d6085b5a9cd1041b69a94091a22e17e2780f8008aea32bd92e7", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking proc-macro2 v1.0.79
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]    Compiling diman_derive_verify v0.3.0
[INFO] [stderr]     Checking diman_unit_system v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/types.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Prefix {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `prefixes` is never read
[INFO] [stdout]   --> src/types.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct UnitEntry {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub prefixes: Vec<Prefix>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/types.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Prefix {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `prefixes` is never read
[INFO] [stdout]   --> src/types.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct UnitEntry {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub prefixes: Vec<Prefix>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.05s
[INFO] running `Command { std: "docker" "inspect" "69a0f8e73ac74d6085b5a9cd1041b69a94091a22e17e2780f8008aea32bd92e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69a0f8e73ac74d6085b5a9cd1041b69a94091a22e17e2780f8008aea32bd92e7", kill_on_drop: false }`
[INFO] [stdout] 69a0f8e73ac74d6085b5a9cd1041b69a94091a22e17e2780f8008aea32bd92e7
[INFO] checking diman_unit_system-0.3.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate diman_unit_system 0.3.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate diman_unit_system 0.3.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate diman_unit_system 0.3.0
[INFO] finished tweaking crates.io crate diman_unit_system 0.3.0
[INFO] tweaked toml for crates.io crate diman_unit_system 0.3.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b938bc708354f35e78e5d24e7f2446640f738d295ec468d364b2231715a4a7d
[INFO] running `Command { std: "docker" "start" "-a" "3b938bc708354f35e78e5d24e7f2446640f738d295ec468d364b2231715a4a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b938bc708354f35e78e5d24e7f2446640f738d295ec468d364b2231715a4a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b938bc708354f35e78e5d24e7f2446640f738d295ec468d364b2231715a4a7d", kill_on_drop: false }`
[INFO] [stdout] 3b938bc708354f35e78e5d24e7f2446640f738d295ec468d364b2231715a4a7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75aa48c713bbfdd0eb538d9d070613f9402d284b8c3f06051b2613b0b744cdca
[INFO] running `Command { std: "docker" "start" "-a" "75aa48c713bbfdd0eb538d9d070613f9402d284b8c3f06051b2613b0b744cdca", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking proc-macro2 v1.0.79
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]    Compiling diman_derive_verify v0.3.0
[INFO] [stderr]     Checking diman_unit_system v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/derive_dimension.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |                         panic_unexpected_type();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/derive_dimension.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |                         panic_unexpected_type();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `diman_unit_system` (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] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `diman_unit_system` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "75aa48c713bbfdd0eb538d9d070613f9402d284b8c3f06051b2613b0b744cdca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75aa48c713bbfdd0eb538d9d070613f9402d284b8c3f06051b2613b0b744cdca", kill_on_drop: false }`
[INFO] [stdout] 75aa48c713bbfdd0eb538d9d070613f9402d284b8c3f06051b2613b0b744cdca