[INFO] cloning repository https://github.com/ff77645/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ff77645/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fff77645%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fff77645%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9aeeceaecf4c3a64d2a346cc94ce3e973a1811bb
[INFO] checking ff77645/rust-playground against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fff77645%2Frust-playground" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ff77645/rust-playground 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/ff77645/rust-playground
[INFO] finished tweaking git repo https://github.com/ff77645/rust-playground
[INFO] tweaked toml for git repo https://github.com/ff77645/rust-playground written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ff77645/rust-playground 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] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded windows-targets v0.48.1
[INFO] [stderr]   Downloaded sync_wrapper v0.1.2
[INFO] [stderr]   Downloaded futures-task v0.3.28
[INFO] [stderr]   Downloaded tokio-macros v2.1.0
[INFO] [stderr]   Downloaded axum-core v0.3.4
[INFO] [stderr]   Downloaded serde_path_to_error v0.1.14
[INFO] [stderr]   Downloaded pin-project-lite v0.2.10
[INFO] [stderr]   Downloaded async-trait v0.1.72
[INFO] [stderr]   Downloaded cc v1.0.80
[INFO] [stderr]   Downloaded serde_json v1.0.104
[INFO] [stderr]   Downloaded gimli v0.27.3
[INFO] [stderr]   Downloaded serde_derive v1.0.180
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.48.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.48.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.48.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.48.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.48.0
[INFO] [stderr]   Downloaded tokio v1.29.1
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.48.0
[INFO] [stderr]   Downloaded object v0.31.1
[INFO] [stderr]   Downloaded syn v2.0.28
[INFO] [stderr]   Downloaded futures-util v0.3.28
[INFO] [stderr]   Downloaded axum v0.6.19
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.48.0
[INFO] [stderr]   Downloaded futures-channel v0.3.28
[INFO] [stderr]   Downloaded http v0.2.9
[INFO] [stderr]   Downloaded httpdate v1.0.2
[INFO] [stderr]   Downloaded matchit v0.7.1
[INFO] [stderr]   Downloaded futures-core v0.3.28
[INFO] [stderr]   Downloaded pin-project-internal v1.1.2
[INFO] [stderr]   Downloaded pin-project v1.1.2
[INFO] [stderr]   Downloaded log v0.4.19
[INFO] [stderr]   Downloaded tracing-core v0.1.31
[INFO] [stderr]   Downloaded tracing v0.1.37
[INFO] [stderr]   Downloaded serde v1.0.180
[INFO] [stderr]   Downloaded addr2line v0.20.0
[INFO] [stderr]   Downloaded backtrace v0.3.68
[INFO] [stderr]   Downloaded bytes v1.4.0
[INFO] [stderr]   Downloaded socket2 v0.4.9
[INFO] [stderr]   Downloaded quote v1.0.32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6416707512fe996e9bdc76d4e4a63aa065821ed773ca1c09fccc6b047eeb79ff
[INFO] running `Command { std: "docker" "start" "-a" "6416707512fe996e9bdc76d4e4a63aa065821ed773ca1c09fccc6b047eeb79ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6416707512fe996e9bdc76d4e4a63aa065821ed773ca1c09fccc6b047eeb79ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6416707512fe996e9bdc76d4e4a63aa065821ed773ca1c09fccc6b047eeb79ff", kill_on_drop: false }`
[INFO] [stdout] 6416707512fe996e9bdc76d4e4a63aa065821ed773ca1c09fccc6b047eeb79ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 492aaf10a6d43a0841ad4f469b49255d10210a55ede96dd61ad05f157ffb6035
[INFO] running `Command { std: "docker" "start" "-a" "492aaf10a6d43a0841ad4f469b49255d10210a55ede96dd61ad05f157ffb6035", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling serde v1.0.180
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling serde_derive v1.0.180
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling async-trait v0.1.72
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling axum-core v0.3.4
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking tower-layer v0.3.2
[INFO] [stderr]    Compiling syn v2.0.28
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking try-lock v0.2.4
[INFO] [stderr]    Compiling axum v0.6.19
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]     Checking want v0.3.1
[INFO] [stderr]     Checking mime v0.3.17
[INFO] [stderr]     Checking matchit v0.7.1
[INFO] [stderr]     Checking sync_wrapper v0.1.2
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking rust-std v0.1.0 (/opt/rustwide/workdir/rust-std)
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> rust-std/examples/str.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let res = sub_str.map(|i|{
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_str`
[INFO] [stdout]  --> rust-std/examples/option.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let option_str:Option<&str> = None;
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_str`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::env::home_dir`: This function's behavior may be unexpected on Windows. Consider using a crate from crates.io instead.
[INFO] [stdout]   --> rust-std/examples/env.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let home_dir = env::home_dir().unwrap();
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Args` that must be used
[INFO] [stdout]  --> rust-std/examples/env.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     dbg!(args);
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking serde_path_to_error v0.1.14
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.2
[INFO] [stderr]     Checking pin-project v1.1.2
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking axum v0.1.0 (/opt/rustwide/workdir/axum)
[INFO] [stdout] warning: unused import: `Query`
[INFO] [stdout]   --> axum/examples/todos.rs:21:22
[INFO] [stdout]    |
[INFO] [stdout] 21 |     extract::{State, Query, Path},
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.74s
[INFO] running `Command { std: "docker" "inspect" "492aaf10a6d43a0841ad4f469b49255d10210a55ede96dd61ad05f157ffb6035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "492aaf10a6d43a0841ad4f469b49255d10210a55ede96dd61ad05f157ffb6035", kill_on_drop: false }`
[INFO] [stdout] 492aaf10a6d43a0841ad4f469b49255d10210a55ede96dd61ad05f157ffb6035