[INFO] cloning repository https://github.com/johesoman/legit
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johesoman/legit" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohesoman%2Flegit", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohesoman%2Flegit'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a77f141337295656bd62b4777347944c6c1cd7e3
[INFO] checking johesoman/legit against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohesoman%2Flegit" "/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/johesoman/legit 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/johesoman/legit
[INFO] finished tweaking git repo https://github.com/johesoman/legit
[INFO] tweaked toml for git repo https://github.com/johesoman/legit written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johesoman/legit 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] 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdf13297736fccff6b9fcd45437ba938359dc21ff1c435da7f03ce2d777904de
[INFO] running `Command { std: "docker" "start" "-a" "fdf13297736fccff6b9fcd45437ba938359dc21ff1c435da7f03ce2d777904de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdf13297736fccff6b9fcd45437ba938359dc21ff1c435da7f03ce2d777904de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf13297736fccff6b9fcd45437ba938359dc21ff1c435da7f03ce2d777904de", kill_on_drop: false }`
[INFO] [stdout] fdf13297736fccff6b9fcd45437ba938359dc21ff1c435da7f03ce2d777904de
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fa634681883e0b297f949a7a8630071843179da57cdc6c0cee6f16c70699a4c
[INFO] running `Command { std: "docker" "start" "-a" "3fa634681883e0b297f949a7a8630071843179da57cdc6c0cee6f16c70699a4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking once_cell v1.7.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking legit v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `path::Display`
[INFO] [stdout]  --> src/object_database.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use path::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Into` is imported redundantly
[INFO] [stdout]  --> src/object_database.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::{Into, TryInto};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Into` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `path::Display`
[INFO] [stdout]  --> src/object_database.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use path::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Into` is imported redundantly
[INFO] [stdout]  --> src/object_database.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::{Into, TryInto};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Into` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]    --> src/object_database.rs:158:18
[INFO] [stdout]     |
[INFO] [stdout] 158 |   fn deserialize(bytes: Vec<u8>) -> Result<Tree> {
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]    --> src/object_database.rs:158:18
[INFO] [stdout]     |
[INFO] [stdout] 158 |   fn deserialize(bytes: Vec<u8>) -> Result<Tree> {
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]    --> src/object_database.rs:241:18
[INFO] [stdout]     |
[INFO] [stdout] 241 |   fn deserialize(bytes: Vec<u8>) -> Result<Commit> {
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]    --> src/object_database.rs:241:18
[INFO] [stdout]     |
[INFO] [stdout] 241 |   fn deserialize(bytes: Vec<u8>) -> Result<Commit> {
[INFO] [stdout]     |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `deserialize` is never used
[INFO] [stdout]   --> src/object_database.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait Object: Sized {
[INFO] [stdout]    |           ------ associated function in this trait
[INFO] [stdout] 33 |   fn serialize(&self) -> Vec<u8>;
[INFO] [stdout] 34 |   fn deserialize(bytes: Vec<u8>) -> Result<Self>;
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `message_summary` are never used
[INFO] [stdout]    --> src/object_database.rs:201:10
[INFO] [stdout]     |
[INFO] [stdout] 200 | impl Commit {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] 201 |   pub fn new(
[INFO] [stdout]     |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 216 |   pub fn message_summary(&self) -> &str {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `deserialize` is never used
[INFO] [stdout]   --> src/object_database.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait Object: Sized {
[INFO] [stdout]    |           ------ associated function in this trait
[INFO] [stdout] 33 |   fn serialize(&self) -> Vec<u8>;
[INFO] [stdout] 34 |   fn deserialize(bytes: Vec<u8>) -> Result<Self>;
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `message_summary` are never used
[INFO] [stdout]    --> src/object_database.rs:201:10
[INFO] [stdout]     |
[INFO] [stdout] 200 | impl Commit {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] 201 |   pub fn new(
[INFO] [stdout]     |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 216 |   pub fn message_summary(&self) -> &str {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.60s
[INFO] running `Command { std: "docker" "inspect" "3fa634681883e0b297f949a7a8630071843179da57cdc6c0cee6f16c70699a4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fa634681883e0b297f949a7a8630071843179da57cdc6c0cee6f16c70699a4c", kill_on_drop: false }`
[INFO] [stdout] 3fa634681883e0b297f949a7a8630071843179da57cdc6c0cee6f16c70699a4c