[INFO] cloning repository https://github.com/CyndieKamau/rustlings_solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CyndieKamau/rustlings_solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyndieKamau%2Frustlings_solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyndieKamau%2Frustlings_solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d76cd5e853487aa6d90520448db834a463554f8
[INFO] checking CyndieKamau/rustlings_solutions against try#0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef for pr-147859
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyndieKamau%2Frustlings_solutions" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/CyndieKamau/rustlings_solutions
[INFO] finished tweaking git repo https://github.com/CyndieKamau/rustlings_solutions
[INFO] tweaked toml for git repo https://github.com/CyndieKamau/rustlings_solutions written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CyndieKamau/rustlings_solutions on toolchain 0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/CyndieKamau/rustlings_solutions 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" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08f2c6531dc2f3d4a0b95df96407d060913d90736627a5d0e938530397665251
[INFO] running `Command { std: "docker" "start" "-a" "08f2c6531dc2f3d4a0b95df96407d060913d90736627a5d0e938530397665251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08f2c6531dc2f3d4a0b95df96407d060913d90736627a5d0e938530397665251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08f2c6531dc2f3d4a0b95df96407d060913d90736627a5d0e938530397665251", kill_on_drop: false }`
[INFO] [stdout] 08f2c6531dc2f3d4a0b95df96407d060913d90736627a5d0e938530397665251
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+0269aeccce4fd29ce9ad0ebd47a62e584d7e25ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c3e4311b9e6fa9afc39ebfa9fb6bb8151b0c8853f96567bad24dbb144c0aa2a
[INFO] running `Command { std: "docker" "start" "-a" "9c3e4311b9e6fa9afc39ebfa9fb6bb8151b0c8853f96567bad24dbb144c0aa2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.53
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]     Checking net2 v0.2.38
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling portable-atomic v1.4.3
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking winnow v0.5.15
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking console v0.15.5
[INFO] [stderr]     Checking filetime v0.2.20
[INFO] [stderr]     Checking regex-automata v0.3.8
[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] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking home v0.5.4
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[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" "9c3e4311b9e6fa9afc39ebfa9fb6bb8151b0c8853f96567bad24dbb144c0aa2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c3e4311b9e6fa9afc39ebfa9fb6bb8151b0c8853f96567bad24dbb144c0aa2a", kill_on_drop: false }`
[INFO] [stdout] 9c3e4311b9e6fa9afc39ebfa9fb6bb8151b0c8853f96567bad24dbb144c0aa2a
