[INFO] cloning repository https://github.com/ucsd-compilers-s23/forest-flame-starter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ucsd-compilers-s23/forest-flame-starter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fucsd-compilers-s23%2Fforest-flame-starter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fucsd-compilers-s23%2Fforest-flame-starter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f791bd657479915e91505d8e9f744a408fd89803
[INFO] checking ucsd-compilers-s23/forest-flame-starter against try#b32fc44666c052e7cf07ab471bfb6f9ec571902f for pr-138676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fucsd-compilers-s23%2Fforest-flame-starter" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ucsd-compilers-s23/forest-flame-starter on toolchain b32fc44666c052e7cf07ab471bfb6f9ec571902f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ucsd-compilers-s23/forest-flame-starter
[INFO] finished tweaking git repo https://github.com/ucsd-compilers-s23/forest-flame-starter
[INFO] tweaked toml for git repo https://github.com/ucsd-compilers-s23/forest-flame-starter written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ucsd-compilers-s23/forest-flame-starter 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" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "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 typenum v1.16.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.57
[INFO] [stderr]   Downloaded aho-corasick v1.0.1
[INFO] [stderr]   Downloaded regex-syntax v0.7.1
[INFO] [stderr]   Downloaded regex v1.8.1
[INFO] [stderr]   Downloaded linux-raw-sys v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 513e924376eb4a1c03c6c4e31e11dc81815539add8c38ea1fc5b5ce548912ca0
[INFO] running `Command { std: "docker" "start" "-a" "513e924376eb4a1c03c6c4e31e11dc81815539add8c38ea1fc5b5ce548912ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "513e924376eb4a1c03c6c4e31e11dc81815539add8c38ea1fc5b5ce548912ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "513e924376eb4a1c03c6c4e31e11dc81815539add8c38ea1fc5b5ce548912ca0", kill_on_drop: false }`
[INFO] [stdout] 513e924376eb4a1c03c6c4e31e11dc81815539add8c38ea1fc5b5ce548912ca0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 868ba9f495f014d4d8543e9c1bf182b5949a6f82d5cca1ed6a18d9f7cbcfa95e
[INFO] running `Command { std: "docker" "start" "-a" "868ba9f495f014d4d8543e9c1bf182b5949a6f82d5cca1ed6a18d9f7cbcfa95e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling proc-macro2 v1.0.57
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.57/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 linux-raw-sys v0.3.7
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking textwrap v0.11.0
[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" "868ba9f495f014d4d8543e9c1bf182b5949a6f82d5cca1ed6a18d9f7cbcfa95e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "868ba9f495f014d4d8543e9c1bf182b5949a6f82d5cca1ed6a18d9f7cbcfa95e", kill_on_drop: false }`
[INFO] [stdout] 868ba9f495f014d4d8543e9c1bf182b5949a6f82d5cca1ed6a18d9f7cbcfa95e