[INFO] cloning repository https://github.com/dillonhicks/semver-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dillonhicks/semver-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdillonhicks%2Fsemver-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdillonhicks%2Fsemver-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 764604a42ef60ef88e18ff8640058b8b635dcbe9
[INFO] checking dillonhicks/semver-parser against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdillonhicks%2Fsemver-parser" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dillonhicks/semver-parser 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 git repo https://github.com/dillonhicks/semver-parser
[INFO] finished tweaking git repo https://github.com/dillonhicks/semver-parser
[INFO] tweaked toml for git repo https://github.com/dillonhicks/semver-parser written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dillonhicks/semver-parser 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror v1.0.21
[INFO] [stderr]   Downloaded thiserror-impl v1.0.21
[INFO] [stderr]   Downloaded anyhow v1.0.33
[INFO] [stderr]   Downloaded syn v1.0.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2bc720d896693686b4a76da6a7a4fdbf8117f5a34382373b00091ac1957c0b16
[INFO] running `Command { std: "docker" "start" "-a" "2bc720d896693686b4a76da6a7a4fdbf8117f5a34382373b00091ac1957c0b16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bc720d896693686b4a76da6a7a4fdbf8117f5a34382373b00091ac1957c0b16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bc720d896693686b4a76da6a7a4fdbf8117f5a34382373b00091ac1957c0b16", kill_on_drop: false }`
[INFO] [stdout] 2bc720d896693686b4a76da6a7a4fdbf8117f5a34382373b00091ac1957c0b16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f76d24c9464ace91f3c786fa283f52d72022f8fe030b64fc698a3e7ee2f702de
[INFO] running `Command { std: "docker" "start" "-a" "f76d24c9464ace91f3c786fa283f52d72022f8fe030b64fc698a3e7ee2f702de", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]     Checking semver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `anyhow`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub(crate) use anyhow;
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Punctuated`
[INFO] [stdout]  --> src/ast/build_meta.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Punctuated},
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub(crate) use anyhow;
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Punctuated`
[INFO] [stdout]  --> src/ast/pre.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Punctuated},
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Punctuated`
[INFO] [stdout]  --> src/ast/build_meta.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Punctuated},
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Plus`
[INFO] [stdout]  --> src/ast/version.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Pair, Plus},
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `thiserror` is imported redundantly
[INFO] [stdout]  --> src/error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::deps::thiserror;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ the item `thiserror` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Punctuated`
[INFO] [stdout]  --> src/ast/pre.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Punctuated},
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Plus`
[INFO] [stdout]  --> src/ast/version.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ast::{self, Dot, Ident, Pair, Plus},
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `thiserror` is imported redundantly
[INFO] [stdout]  --> src/error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::deps::thiserror;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ the item `thiserror` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `Command { std: "docker" "inspect" "f76d24c9464ace91f3c786fa283f52d72022f8fe030b64fc698a3e7ee2f702de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76d24c9464ace91f3c786fa283f52d72022f8fe030b64fc698a3e7ee2f702de", kill_on_drop: false }`
[INFO] [stdout] f76d24c9464ace91f3c786fa283f52d72022f8fe030b64fc698a3e7ee2f702de