[INFO] cloning repository https://github.com/JungleTryne/LittleCompiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JungleTryne/LittleCompiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJungleTryne%2FLittleCompiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJungleTryne%2FLittleCompiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98def565184e94d5c057364be2c99d0073d1642a
[INFO] checking JungleTryne/LittleCompiler against master#4d1bd0db7f489b22c6d8aa2385937a95412c015b for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJungleTryne%2FLittleCompiler" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JungleTryne/LittleCompiler on toolchain 4d1bd0db7f489b22c6d8aa2385937a95412c015b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JungleTryne/LittleCompiler
[INFO] finished tweaking git repo https://github.com/JungleTryne/LittleCompiler
[INFO] tweaked toml for git repo https://github.com/JungleTryne/LittleCompiler written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/JungleTryne/LittleCompiler 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" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking JungleTryne/LittleCompiler against try#785364c7e5e0804473a3fddfb579798ea14e3493 for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJungleTryne%2FLittleCompiler" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JungleTryne/LittleCompiler on toolchain 785364c7e5e0804473a3fddfb579798ea14e3493
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JungleTryne/LittleCompiler
[INFO] finished tweaking git repo https://github.com/JungleTryne/LittleCompiler
[INFO] tweaked toml for git repo https://github.com/JungleTryne/LittleCompiler written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/JungleTryne/LittleCompiler 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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d879081cc0817cf8e6d54963bfd3355d5a458348d12e96c7c7ef6f9a4220847
[INFO] running `Command { std: "docker" "start" "-a" "6d879081cc0817cf8e6d54963bfd3355d5a458348d12e96c7c7ef6f9a4220847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d879081cc0817cf8e6d54963bfd3355d5a458348d12e96c7c7ef6f9a4220847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d879081cc0817cf8e6d54963bfd3355d5a458348d12e96c7c7ef6f9a4220847", kill_on_drop: false }`
[INFO] [stdout] 6d879081cc0817cf8e6d54963bfd3355d5a458348d12e96c7c7ef6f9a4220847
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 677f6adc62a1131eaa723dc3f494ad68cdddeed29e9ae8eca99fade7f2ee8aa5
[INFO] running `Command { std: "docker" "start" "-a" "677f6adc62a1131eaa723dc3f494ad68cdddeed29e9ae8eca99fade7f2ee8aa5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling io-lifetimes v1.0.5
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling rustix v0.36.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/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] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "677f6adc62a1131eaa723dc3f494ad68cdddeed29e9ae8eca99fade7f2ee8aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "677f6adc62a1131eaa723dc3f494ad68cdddeed29e9ae8eca99fade7f2ee8aa5", kill_on_drop: false }`
[INFO] [stdout] 677f6adc62a1131eaa723dc3f494ad68cdddeed29e9ae8eca99fade7f2ee8aa5