[INFO] cloning repository https://github.com/tomoat/hello_world
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomoat/hello_world" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoat%2Fhello_world", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoat%2Fhello_world'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a581c63863331106b02098b3525229a0ffa89dd8
[INFO] checking tomoat/hello_world against 846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9 for pr-164812
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomoat%2Fhello_world" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tomoat/hello_world
[INFO] finished tweaking git repo https://github.com/tomoat/hello_world
[INFO] tweaked toml for git repo https://github.com/tomoat/hello_world written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tomoat/hello_world on toolchain 846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tomoat/hello_world 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" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded num-iter v0.1.42
[INFO] [stderr]   Downloaded num-bigint v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d
[INFO] running `Command { std: "docker" "start" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d" "/opt/rustwide/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d" "/opt/rustwide/cargo-home/bin/cargo" "+846e51f66b1e7b49ba9e3988c58ccfe5817ce0a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `val` is never read
[INFO] [stdout]     --> src/main.rs:1496:14
[INFO] [stdout]      |
[INFO] [stdout] 1496 |         Some(mut val) => {
[INFO] [stdout]      |              ^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 1497 |             val = 6;
[INFO] [stdout]      |             ------- `val` is overwritten here before the previous value is read
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age2` is never read
[INFO] [stdout]     --> src/main.rs:1506:17
[INFO] [stdout]      |
[INFO] [stdout] 1506 |     if let Some(mut age2) = age {
[INFO] [stdout]      |                 ^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 1507 |         age2 = 32;
[INFO] [stdout]      |         --------- `age2` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:931:18
[INFO] [stdout]     |
[INFO] [stdout] 931 |     struct Color(i32, i32, i32);
[INFO] [stdout]     |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1052:16
[INFO] [stdout]      |
[INFO] [stdout] 1052 |         Spades(PokerRank),
[INFO] [stdout]      |         ------ ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1052 -         Spades(PokerRank),
[INFO] [stdout] 1052 +         Spades(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1053:16
[INFO] [stdout]      |
[INFO] [stdout] 1053 |         Hearts(PokerRank),
[INFO] [stdout]      |         ------ ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1053 -         Hearts(PokerRank),
[INFO] [stdout] 1053 +         Hearts(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1054:18
[INFO] [stdout]      |
[INFO] [stdout] 1054 |         Diamonds(PokerRank),
[INFO] [stdout]      |         -------- ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1054 -         Diamonds(PokerRank),
[INFO] [stdout] 1054 +         Diamonds(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1055:15
[INFO] [stdout]      |
[INFO] [stdout] 1055 |         Clubs(PokerRank),
[INFO] [stdout]      |         ----- ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1055 -         Clubs(PokerRank),
[INFO] [stdout] 1055 +         Clubs(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:538:21
[INFO] [stdout]     |
[INFO] [stdout] 538 |     assert_eq!(5, *y.deref());
[INFO] [stdout]     |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `i32` does not implement `Deref`, so calling `deref` on `&i32` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `val` is never read
[INFO] [stdout]     --> src/main.rs:1496:14
[INFO] [stdout]      |
[INFO] [stdout] 1496 |         Some(mut val) => {
[INFO] [stdout]      |              ^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 1497 |             val = 6;
[INFO] [stdout]      |             ------- `val` is overwritten here before the previous value is read
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age2` is never read
[INFO] [stdout]     --> src/main.rs:1506:17
[INFO] [stdout]      |
[INFO] [stdout] 1506 |     if let Some(mut age2) = age {
[INFO] [stdout]      |                 ^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 1507 |         age2 = 32;
[INFO] [stdout]      |         --------- `age2` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:931:18
[INFO] [stdout]     |
[INFO] [stdout] 931 |     struct Color(i32, i32, i32);
[INFO] [stdout]     |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1052:16
[INFO] [stdout]      |
[INFO] [stdout] 1052 |         Spades(PokerRank),
[INFO] [stdout]      |         ------ ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1052 -         Spades(PokerRank),
[INFO] [stdout] 1052 +         Spades(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1053:16
[INFO] [stdout]      |
[INFO] [stdout] 1053 |         Hearts(PokerRank),
[INFO] [stdout]      |         ------ ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1053 -         Hearts(PokerRank),
[INFO] [stdout] 1053 +         Hearts(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1054:18
[INFO] [stdout]      |
[INFO] [stdout] 1054 |         Diamonds(PokerRank),
[INFO] [stdout]      |         -------- ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1054 -         Diamonds(PokerRank),
[INFO] [stdout] 1054 +         Diamonds(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/main.rs:1055:15
[INFO] [stdout]      |
[INFO] [stdout] 1055 |         Clubs(PokerRank),
[INFO] [stdout]      |         ----- ^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `PokerCard` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1055 -         Clubs(PokerRank),
[INFO] [stdout] 1055 +         Clubs(()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:538:21
[INFO] [stdout]     |
[INFO] [stdout] 538 |     assert_eq!(5, *y.deref());
[INFO] [stdout]     |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `i32` does not implement `Deref`, so calling `deref` on `&i32` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.48s
[INFO] running `Command { std: "docker" "inspect" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d", kill_on_drop: false }`
[INFO] [stdout] f75580ae88238026ab97a58b51296f6a25f9d744c0d4ce998bc03fda4587b98d
