[INFO] fetching crate skeletonize 0.2.0...
[INFO] testing skeletonize-0.2.0 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145330-1
[INFO] extracting crate skeletonize 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate skeletonize 0.2.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate skeletonize 0.2.0
[INFO] tweaked toml for crates.io crate skeletonize 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate skeletonize 0.2.0 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate skeletonize 0.2.0 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytemuck v1.12.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.49
[INFO] [stderr]   Downloaded weezl v0.1.7
[INFO] [stderr]   Downloaded png v0.17.7
[INFO] [stderr]   Downloaded image v0.24.5
[INFO] [stderr]   Downloaded gif v0.11.4
[INFO] [stderr]   Downloaded jpeg-decoder v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4faf7c7ab0ab55a916b8ace2fc7f355e1b8dea449cb16e264b7006267823cbc
[INFO] running `Command { std: "docker" "start" "-a" "c4faf7c7ab0ab55a916b8ace2fc7f355e1b8dea449cb16e264b7006267823cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4faf7c7ab0ab55a916b8ace2fc7f355e1b8dea449cb16e264b7006267823cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4faf7c7ab0ab55a916b8ace2fc7f355e1b8dea449cb16e264b7006267823cbc", kill_on_drop: false }`
[INFO] [stdout] c4faf7c7ab0ab55a916b8ace2fc7f355e1b8dea449cb16e264b7006267823cbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 834e3ad953112ab21e6646c4b9ef45b32ab427ab065899448195968eb10d5507
[INFO] running `Command { std: "docker" "start" "-a" "834e3ad953112ab21e6646c4b9ef45b32ab427ab065899448195968eb10d5507", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling weezl v0.1.7
[INFO] [stderr]    Compiling bytemuck v1.12.3
[INFO] [stderr]    Compiling jpeg-decoder v0.3.0
[INFO] [stderr]    Compiling gif v0.11.4
[INFO] [stderr]    Compiling flate2 v1.0.25
[INFO] [stderr]    Compiling png v0.17.7
[INFO] [stderr]    Compiling image v0.24.5
[INFO] [stderr]    Compiling skeletonize v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.02s
[INFO] running `Command { std: "docker" "inspect" "834e3ad953112ab21e6646c4b9ef45b32ab427ab065899448195968eb10d5507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "834e3ad953112ab21e6646c4b9ef45b32ab427ab065899448195968eb10d5507", kill_on_drop: false }`
[INFO] [stdout] 834e3ad953112ab21e6646c4b9ef45b32ab427ab065899448195968eb10d5507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef89a1c3e493bc5f67f75fb222b98b7f8a7ee615285ac14f4cd75cc9ec608db7
[INFO] running `Command { std: "docker" "start" "-a" "ef89a1c3e493bc5f67f75fb222b98b7f8a7ee615285ac14f4cd75cc9ec608db7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.10.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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] [stderr]    Compiling heck v0.3.3
[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" "ef89a1c3e493bc5f67f75fb222b98b7f8a7ee615285ac14f4cd75cc9ec608db7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef89a1c3e493bc5f67f75fb222b98b7f8a7ee615285ac14f4cd75cc9ec608db7", kill_on_drop: false }`
[INFO] [stdout] ef89a1c3e493bc5f67f75fb222b98b7f8a7ee615285ac14f4cd75cc9ec608db7