[INFO] cloning repository https://github.com/ha1o0/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/ha1o0/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fha1o0%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fha1o0%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 846c7a76aeffcf18ec77fd4f186baf31b4e5ca03
[INFO] checking ha1o0/learn-rust against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fha1o0%2Flearn-rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ha1o0/learn-rust
[INFO] finished tweaking git repo https://github.com/ha1o0/learn-rust
[INFO] tweaked toml for git repo https://github.com/ha1o0/learn-rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ha1o0/learn-rust on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ha1o0/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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matchit v0.7.0
[INFO] [stderr]   Downloaded tonic-build v0.9.2
[INFO] [stderr]   Downloaded axum-core v0.3.4
[INFO] [stderr]   Downloaded which v4.4.0
[INFO] [stderr]   Downloaded tracing-attributes v0.1.24
[INFO] [stderr]   Downloaded bumpalo v3.12.1
[INFO] [stderr]   Downloaded tonic v0.9.2
[INFO] [stderr]   Downloaded axum v0.6.17
[INFO] [stderr]   Downloaded regex v1.8.1
[INFO] [stderr]   Downloaded rustix v0.37.17
[INFO] [stderr]   Downloaded regex-syntax v0.7.1
[INFO] [stderr]   Downloaded tokio v1.28.0
[INFO] [stderr]   Downloaded libc v0.2.142
[INFO] [stderr]   Downloaded linux-raw-sys v0.3.6
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99a6e373d1f7264f074414925f9896eeb8d44eaaf06c012896f7ba6128d751d5
[INFO] running `Command { std: "docker" "start" "-a" "99a6e373d1f7264f074414925f9896eeb8d44eaaf06c012896f7ba6128d751d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99a6e373d1f7264f074414925f9896eeb8d44eaaf06c012896f7ba6128d751d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99a6e373d1f7264f074414925f9896eeb8d44eaaf06c012896f7ba6128d751d5", kill_on_drop: false }`
[INFO] [stdout] 99a6e373d1f7264f074414925f9896eeb8d44eaaf06c012896f7ba6128d751d5
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3057b1901402e8f5d132a315d0e445769d2e241d2fccecd7046f4d943b3bfccd
[INFO] running `Command { std: "docker" "start" "-a" "3057b1901402e8f5d132a315d0e445769d2e241d2fccecd7046f4d943b3bfccd", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling rustversion v1.0.12
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling rustix v0.37.17
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling linux-raw-sys v0.3.6
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling tokio v1.28.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3057b1901402e8f5d132a315d0e445769d2e241d2fccecd7046f4d943b3bfccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3057b1901402e8f5d132a315d0e445769d2e241d2fccecd7046f4d943b3bfccd", kill_on_drop: false }`
[INFO] [stdout] 3057b1901402e8f5d132a315d0e445769d2e241d2fccecd7046f4d943b3bfccd