[INFO] fetching crate neutrons 0.0.2...
[INFO] checking neutrons-0.0.2 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate neutrons 0.0.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate neutrons 0.0.2
[INFO] finished tweaking crates.io crate neutrons 0.0.2
[INFO] tweaked toml for crates.io crate neutrons 0.0.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate neutrons 0.0.2 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate neutrons 0.0.2 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6b0b86c17a64e87a3192f312a6917ca8c9e97efc8bc834d0ed245f26a877543
[INFO] running `Command { std: "docker" "start" "-a" "b6b0b86c17a64e87a3192f312a6917ca8c9e97efc8bc834d0ed245f26a877543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6b0b86c17a64e87a3192f312a6917ca8c9e97efc8bc834d0ed245f26a877543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6b0b86c17a64e87a3192f312a6917ca8c9e97efc8bc834d0ed245f26a877543", kill_on_drop: false }`
[INFO] [stdout] b6b0b86c17a64e87a3192f312a6917ca8c9e97efc8bc834d0ed245f26a877543
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fb689df2f8ba5eb9d97063819cff4cb523491151a521c2db1436d299f71808f
[INFO] running `Command { std: "docker" "start" "-a" "5fb689df2f8ba5eb9d97063819cff4cb523491151a521c2db1436d299f71808f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.52
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling serde_derive v1.0.158
[INFO] [stderr]    Compiling serde v1.0.158
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling phf_shared v0.11.1
[INFO] [stderr]    Compiling paste v1.0.12
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking safe_arch v0.6.0
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]    Compiling phf_generator v0.11.1
[INFO] [stderr]    Compiling portable-atomic v0.3.19
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling palette v0.6.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking wide v0.7.8
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.52/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 ryu v1.0.13
[INFO] [stderr]     Checking slice-of-array v0.3.2
[INFO] [stderr]     Checking flate2 v1.0.25
[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" "5fb689df2f8ba5eb9d97063819cff4cb523491151a521c2db1436d299f71808f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb689df2f8ba5eb9d97063819cff4cb523491151a521c2db1436d299f71808f", kill_on_drop: false }`
[INFO] [stdout] 5fb689df2f8ba5eb9d97063819cff4cb523491151a521c2db1436d299f71808f