[INFO] cloning repository https://github.com/alisyahidin/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alisyahidin/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falisyahidin%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falisyahidin%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39e06a4c47405f6bd1d3bfee0b1d08a704491315
[INFO] checking alisyahidin/learn-rust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falisyahidin%2Flearn-rust" "/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/alisyahidin/learn-rust 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/alisyahidin/learn-rust
[INFO] finished tweaking git repo https://github.com/alisyahidin/learn-rust
[INFO] tweaked toml for git repo https://github.com/alisyahidin/learn-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/alisyahidin/learn-rust 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] 25fd3ba2fd9ab61db00b452148896308c936621d14b7a148c1aed7579239122f
[INFO] running `Command { std: "docker" "start" "-a" "25fd3ba2fd9ab61db00b452148896308c936621d14b7a148c1aed7579239122f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25fd3ba2fd9ab61db00b452148896308c936621d14b7a148c1aed7579239122f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25fd3ba2fd9ab61db00b452148896308c936621d14b7a148c1aed7579239122f", kill_on_drop: false }`
[INFO] [stdout] 25fd3ba2fd9ab61db00b452148896308c936621d14b7a148c1aed7579239122f
[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] dbc7bf475a9bd80e1a2f4aa0527882f94af5a5a480ea4895c01cfbbf3dabc484
[INFO] running `Command { std: "docker" "start" "-a" "dbc7bf475a9bd80e1a2f4aa0527882f94af5a5a480ea4895c01cfbbf3dabc484", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.14
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/main.rs:87:21
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Address(f32, f32, f32);
[INFO] [stdout]    |        -------      ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] 87 | struct Address(f32, (), f32);
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Monday`, `Tuesday`, `Wednesday`, `Thursday`, `Friday`, and `Sunday` are never constructed
[INFO] [stdout]    --> src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 126 | enum Day {
[INFO] [stdout]     |      --- variants in this enum
[INFO] [stdout] 127 |     Monday,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 128 |     Tuesday,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 129 |     Wednesday,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 130 |     Thursday,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 131 |     Friday,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 132 |     Saturday,
[INFO] [stdout] 133 |     Sunday,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/main.rs:87:21
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Address(f32, f32, f32);
[INFO] [stdout]    |        -------      ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] 87 | struct Address(f32, (), f32);
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Monday`, `Tuesday`, `Wednesday`, `Thursday`, `Friday`, and `Sunday` are never constructed
[INFO] [stdout]    --> src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 126 | enum Day {
[INFO] [stdout]     |      --- variants in this enum
[INFO] [stdout] 127 |     Monday,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 128 |     Tuesday,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 129 |     Wednesday,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 130 |     Thursday,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 131 |     Friday,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 132 |     Saturday,
[INFO] [stdout] 133 |     Sunday,
[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 3.69s
[INFO] running `Command { std: "docker" "inspect" "dbc7bf475a9bd80e1a2f4aa0527882f94af5a5a480ea4895c01cfbbf3dabc484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbc7bf475a9bd80e1a2f4aa0527882f94af5a5a480ea4895c01cfbbf3dabc484", kill_on_drop: false }`
[INFO] [stdout] dbc7bf475a9bd80e1a2f4aa0527882f94af5a5a480ea4895c01cfbbf3dabc484