[INFO] cloning repository https://github.com/Keksoj/learn_tracing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Keksoj/learn_tracing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Flearn_tracing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Flearn_tracing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b717d05ea1cf3caff3fbd8ea306a0a33d21f19e3
[INFO] checking Keksoj/learn_tracing against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Flearn_tracing" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Keksoj/learn_tracing on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] finished tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] tweaked toml for git repo https://github.com/Keksoj/learn_tracing written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Keksoj/learn_tracing 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "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 Keksoj/learn_tracing against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Flearn_tracing" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Keksoj/learn_tracing on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] finished tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] tweaked toml for git repo https://github.com/Keksoj/learn_tracing written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Keksoj/learn_tracing 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking Keksoj/learn_tracing against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Flearn_tracing" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Keksoj/learn_tracing on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] finished tweaking git repo https://github.com/Keksoj/learn_tracing
[INFO] tweaked toml for git repo https://github.com/Keksoj/learn_tracing written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Keksoj/learn_tracing 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2975686c9da2ec5ae74d66fcc686e9069af984212c6c8ede8bc58e4e9c4d739
[INFO] running `Command { std: "docker" "start" "-a" "d2975686c9da2ec5ae74d66fcc686e9069af984212c6c8ede8bc58e4e9c4d739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2975686c9da2ec5ae74d66fcc686e9069af984212c6c8ede8bc58e4e9c4d739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2975686c9da2ec5ae74d66fcc686e9069af984212c6c8ede8bc58e4e9c4d739", kill_on_drop: false }`
[INFO] [stdout] d2975686c9da2ec5ae74d66fcc686e9069af984212c6c8ede8bc58e4e9c4d739
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cca68fd910cba45f55f0cb27335ebf516bb9acbf22c226fb8c7e5dd0d3c9809
[INFO] running `Command { std: "docker" "start" "-a" "6cca68fd910cba45f55f0cb27335ebf516bb9acbf22c226fb8c7e5dd0d3c9809", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling polling v2.5.2
[INFO] [stderr]    Compiling async-io v1.12.0
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling async-net v1.7.0
[INFO] [stderr]    Compiling async-process v1.6.0
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling tokio v1.23.0
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking concurrent-queue v2.0.0
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/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 async-channel v1.8.0
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking tracing-log v0.1.3
[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" "6cca68fd910cba45f55f0cb27335ebf516bb9acbf22c226fb8c7e5dd0d3c9809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cca68fd910cba45f55f0cb27335ebf516bb9acbf22c226fb8c7e5dd0d3c9809", kill_on_drop: false }`
[INFO] [stdout] 6cca68fd910cba45f55f0cb27335ebf516bb9acbf22c226fb8c7e5dd0d3c9809