[INFO] fetching crate svg-diff 0.0.6...
[INFO] building svg-diff-0.0.6 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate svg-diff 0.0.6 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate svg-diff 0.0.6
[INFO] finished tweaking crates.io crate svg-diff 0.0.6
[INFO] tweaked toml for crates.io crate svg-diff 0.0.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate svg-diff 0.0.6 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate svg-diff 0.0.6 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde-wasm-bindgen v0.4.5
[INFO] [stderr]   Downloaded svgtypes v0.8.1
[INFO] [stderr]   Downloaded actix-web-codegen v4.1.0
[INFO] [stderr]   Downloaded addr2line v0.17.0
[INFO] [stderr]   Downloaded cookie v0.16.1
[INFO] [stderr]   Downloaded libloading v0.7.3
[INFO] [stderr]   Downloaded tokio-util v0.7.4
[INFO] [stderr]   Downloaded serde_derive v1.0.146
[INFO] [stderr]   Downloaded napi-build v2.0.1
[INFO] [stderr]   Downloaded object v0.29.0
[INFO] [stderr]   Downloaded serde v1.0.146
[INFO] [stderr]   Downloaded once_cell v1.15.0
[INFO] [stderr]   Downloaded syn v1.0.103
[INFO] [stderr]   Downloaded askama_escape v0.10.3
[INFO] [stderr]   Downloaded jobserver v0.1.25
[INFO] [stderr]   Downloaded actix-rt v2.7.0
[INFO] [stderr]   Downloaded actix-service v2.0.2
[INFO] [stderr]   Downloaded zstd v0.11.2+zstd.1.5.2
[INFO] [stderr]   Downloaded digest v0.10.5
[INFO] [stderr]   Downloaded actix-macros v0.2.3
[INFO] [stderr]   Downloaded actix-codec v0.5.0
[INFO] [stderr]   Downloaded actix-files v0.6.2
[INFO] [stderr]   Downloaded zstd-safe v5.0.2+zstd.1.5.2
[INFO] [stderr]   Downloaded local-waker v0.1.3
[INFO] [stderr]   Downloaded actix-server v2.1.1
[INFO] [stderr]   Downloaded napi-sys v2.2.2
[INFO] [stderr]   Downloaded local-channel v0.1.3
[INFO] [stderr]   Downloaded tokio v1.21.2
[INFO] [stderr]   Downloaded pikchr v0.1.1
[INFO] [stderr]   Downloaded env_logger v0.9.1
[INFO] [stderr]   Downloaded zstd-sys v2.0.1+zstd.1.5.2
[INFO] [stderr]   Downloaded napi-derive v2.9.1
[INFO] [stderr]   Downloaded napi v2.10.0
[INFO] [stderr]   Downloaded encoding_rs v0.8.31
[INFO] [stderr]   Downloaded actix-web v4.2.1
[INFO] [stderr]   Downloaded serde_json v1.0.87
[INFO] [stderr]   Downloaded backtrace v0.3.66
[INFO] [stderr]   Downloaded semver v1.0.14
[INFO] [stderr]   Downloaded h2 v0.3.14
[INFO] [stderr]   Downloaded svg v0.12.0
[INFO] [stderr]   Downloaded flange-flat-tree v0.2.2
[INFO] [stderr]   Downloaded serde_yaml v0.9.13
[INFO] [stderr]   Downloaded gimli v0.26.2
[INFO] [stderr]   Downloaded libc v0.2.135
[INFO] [stderr]   Downloaded parking_lot_core v0.9.4
[INFO] [stderr]   Downloaded actix-http v3.2.2
[INFO] [stderr]   Downloaded mio v0.8.4
[INFO] [stderr]   Downloaded napi-derive-backend v1.0.38
[INFO] [stderr]   Downloaded actix-router v0.5.1
[INFO] [stderr]   Downloaded bytestring v1.1.0
[INFO] [stderr]   Downloaded miniz_oxide v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c236bc963bb2cdea63ced3ba782644b057d604c4b873a9d165c60830e83e69e0
[INFO] running `Command { std: "docker" "start" "-a" "c236bc963bb2cdea63ced3ba782644b057d604c4b873a9d165c60830e83e69e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c236bc963bb2cdea63ced3ba782644b057d604c4b873a9d165c60830e83e69e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c236bc963bb2cdea63ced3ba782644b057d604c4b873a9d165c60830e83e69e0", kill_on_drop: false }`
[INFO] [stdout] c236bc963bb2cdea63ced3ba782644b057d604c4b873a9d165c60830e83e69e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09d3cba40f4704041892d3156151b064ab222a8b5c988d64b6890c9e95ff477e
[INFO] running `Command { std: "docker" "start" "-a" "09d3cba40f4704041892d3156151b064ab222a8b5c988d64b6890c9e95ff477e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling serde_derive v1.0.146
[INFO] [stderr]    Compiling serde v1.0.146
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling gimli v0.26.2
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling miniz_oxide v0.5.4
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling object v0.29.0
[INFO] [stderr]    Compiling serde_json v1.0.87
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.4
[INFO] [stderr]    Compiling svg-diff v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling svg v0.12.0
[INFO] [stderr]    Compiling flange-flat-tree v0.2.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling svgtypes v0.8.1
[INFO] [stderr]    Compiling error-chain v0.12.4
[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" "09d3cba40f4704041892d3156151b064ab222a8b5c988d64b6890c9e95ff477e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d3cba40f4704041892d3156151b064ab222a8b5c988d64b6890c9e95ff477e", kill_on_drop: false }`
[INFO] [stdout] 09d3cba40f4704041892d3156151b064ab222a8b5c988d64b6890c9e95ff477e