[INFO] cloning repository https://github.com/mzahor/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mzahor/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzahor%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzahor%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d97aa131b0c473452c9d5b19713a054b3713288b
[INFO] checking mzahor/rustlings against try#943e2200e35c3825486c4671b6cab0107a07f8c1 for pr-148952
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzahor%2Frustlings" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mzahor/rustlings
[INFO] finished tweaking git repo https://github.com/mzahor/rustlings
[INFO] tweaked toml for git repo https://github.com/mzahor/rustlings written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mzahor/rustlings on toolchain 943e2200e35c3825486c4671b6cab0107a07f8c1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+943e2200e35c3825486c4671b6cab0107a07f8c1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mzahor/rustlings 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" "+943e2200e35c3825486c4671b6cab0107a07f8c1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded filetime v0.2.22
[INFO] [stderr]   Downloaded notify-debouncer-mini v0.4.1
[INFO] [stderr]   Downloaded serde_spanned v0.6.3
[INFO] [stderr]   Downloaded anstyle v1.0.3
[INFO] [stderr]   Downloaded predicates v3.0.3
[INFO] [stderr]   Downloaded clap_lex v0.5.1
[INFO] [stderr]   Downloaded anstyle-wincon v2.1.0
[INFO] [stderr]   Downloaded assert_cmd v2.0.12
[INFO] [stderr]   Downloaded portable-atomic v1.4.3
[INFO] [stderr]   Downloaded clap v4.4.3
[INFO] [stderr]   Downloaded indicatif v0.17.6
[INFO] [stderr]   Downloaded anstream v0.5.0
[INFO] [stderr]   Downloaded clap_derive v4.4.2
[INFO] [stderr]   Downloaded clap_builder v4.4.2
[INFO] [stderr]   Downloaded winnow v0.5.15
[INFO] [stderr]   Downloaded bstr v1.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+943e2200e35c3825486c4671b6cab0107a07f8c1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 201e2c0a0fd3c6cd42464e87685fe285c292678aedba1fa7eb728cc352ff1b14
[INFO] running `Command { std: "docker" "start" "-a" "201e2c0a0fd3c6cd42464e87685fe285c292678aedba1fa7eb728cc352ff1b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "201e2c0a0fd3c6cd42464e87685fe285c292678aedba1fa7eb728cc352ff1b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "201e2c0a0fd3c6cd42464e87685fe285c292678aedba1fa7eb728cc352ff1b14", kill_on_drop: false }`
[INFO] [stdout] 201e2c0a0fd3c6cd42464e87685fe285c292678aedba1fa7eb728cc352ff1b14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+943e2200e35c3825486c4671b6cab0107a07f8c1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8307fc41a772e02d0f0da7714cc1bc2165f0fc2bfe3236e800ca940703be10c3
[INFO] running `Command { std: "docker" "start" "-a" "8307fc41a772e02d0f0da7714cc1bc2165f0fc2bfe3236e800ca940703be10c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.53
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]    Compiling portable-atomic v1.4.3
[INFO] [stderr]     Checking anstyle-parse v0.2.1
[INFO] [stderr]     Checking inotify v0.9.6
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.53/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]     Checking mio v0.8.9
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking filetime v0.2.22
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[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" "8307fc41a772e02d0f0da7714cc1bc2165f0fc2bfe3236e800ca940703be10c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8307fc41a772e02d0f0da7714cc1bc2165f0fc2bfe3236e800ca940703be10c3", kill_on_drop: false }`
[INFO] [stdout] 8307fc41a772e02d0f0da7714cc1bc2165f0fc2bfe3236e800ca940703be10c3