[INFO] cloning repository https://github.com/mihneabuz/led_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mihneabuz/led_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihneabuz%2Fled_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihneabuz%2Fled_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72c3865b89617ff22f46a92709a3403146f03089
[INFO] checking mihneabuz/led_tree against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124305
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihneabuz%2Fled_tree" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mihneabuz/led_tree on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mihneabuz/led_tree
[INFO] finished tweaking git repo https://github.com/mihneabuz/led_tree
[INFO] tweaked toml for git repo https://github.com/mihneabuz/led_tree written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mihneabuz/led_tree 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "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 mihneabuz/led_tree against try#44523379467bbd2050af931a040d10c2b764b443 for pr-124305
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihneabuz%2Fled_tree" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mihneabuz/led_tree on toolchain 44523379467bbd2050af931a040d10c2b764b443
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mihneabuz/led_tree
[INFO] finished tweaking git repo https://github.com/mihneabuz/led_tree
[INFO] tweaked toml for git repo https://github.com/mihneabuz/led_tree written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mihneabuz/led_tree 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" "+44523379467bbd2050af931a040d10c2b764b443" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd83b33f5e8d4a93e56640a652e72622159aede7247729bf49afc3142a24a986
[INFO] running `Command { std: "docker" "start" "-a" "dd83b33f5e8d4a93e56640a652e72622159aede7247729bf49afc3142a24a986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd83b33f5e8d4a93e56640a652e72622159aede7247729bf49afc3142a24a986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd83b33f5e8d4a93e56640a652e72622159aede7247729bf49afc3142a24a986", kill_on_drop: false }`
[INFO] [stdout] dd83b33f5e8d4a93e56640a652e72622159aede7247729bf49afc3142a24a986
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1720282fdc9e2237599caf0e58a76d6e0715ee03ecb5755139bd589e14e3d193
[INFO] running `Command { std: "docker" "start" "-a" "1720282fdc9e2237599caf0e58a76d6e0715ee03ecb5755139bd589e14e3d193", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking chunked_transfer v1.4.1
[INFO] [stderr]     Checking tiny_http v0.12.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.49/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" "1720282fdc9e2237599caf0e58a76d6e0715ee03ecb5755139bd589e14e3d193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1720282fdc9e2237599caf0e58a76d6e0715ee03ecb5755139bd589e14e3d193", kill_on_drop: false }`
[INFO] [stdout] 1720282fdc9e2237599caf0e58a76d6e0715ee03ecb5755139bd589e14e3d193