[INFO] fetching crate flo_render_canvas 0.3.1...
[INFO] checking flo_render_canvas-0.3.1 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate flo_render_canvas 0.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate flo_render_canvas 0.3.1 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo_render_canvas 0.3.1
[INFO] finished tweaking crates.io crate flo_render_canvas 0.3.1
[INFO] tweaked toml for crates.io crate flo_render_canvas 0.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate flo_render_canvas 0.3.1 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded inflate v0.3.4
[INFO] [stderr]   Downloaded lyon_algorithms v0.17.7
[INFO] [stderr]   Downloaded lyon v0.17.10
[INFO] [stderr]   Downloaded flo_stream v0.6.0
[INFO] [stderr]   Downloaded flo_render v0.3.1
[INFO] [stderr]   Downloaded desync v0.7.2
[INFO] [stderr]   Downloaded serde_derive v1.0.154
[INFO] [stderr]   Downloaded serde v1.0.154
[INFO] [stderr]   Downloaded lyon_geom v0.17.7
[INFO] [stderr]   Downloaded roots v0.0.7
[INFO] [stderr]   Downloaded png v0.11.0
[INFO] [stderr]   Downloaded flo_canvas v0.3.1
[INFO] [stderr]   Downloaded flo_curves v0.6.1
[INFO] [stderr]   Downloaded rust-hsluv v0.1.4
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2507f0f1e6ef2e3ca79704837ae9a25dbf234b0186829a7c46c80ec43b5a12ae
[INFO] running `Command { std: "docker" "start" "-a" "2507f0f1e6ef2e3ca79704837ae9a25dbf234b0186829a7c46c80ec43b5a12ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2507f0f1e6ef2e3ca79704837ae9a25dbf234b0186829a7c46c80ec43b5a12ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2507f0f1e6ef2e3ca79704837ae9a25dbf234b0186829a7c46c80ec43b5a12ae", kill_on_drop: false }`
[INFO] [stdout] 2507f0f1e6ef2e3ca79704837ae9a25dbf234b0186829a7c46c80ec43b5a12ae
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0317af0be77170562d5940d448909a44a522238d72b8a5e05db5a976a5fbdf2
[INFO] running `Command { std: "docker" "start" "-a" "f0317af0be77170562d5940d448909a44a522238d72b8a5e05db5a976a5fbdf2", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling futures-task v0.3.26
[INFO] [stderr]    Compiling futures-channel v0.3.26
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/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 futures-util v0.3.26
[INFO] [stderr]     Checking futures-sink v0.3.26
[INFO] [stderr]    Compiling log v0.4.17
[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]    Compiling aho-corasick v0.7.20
[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" "f0317af0be77170562d5940d448909a44a522238d72b8a5e05db5a976a5fbdf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0317af0be77170562d5940d448909a44a522238d72b8a5e05db5a976a5fbdf2", kill_on_drop: false }`
[INFO] [stdout] f0317af0be77170562d5940d448909a44a522238d72b8a5e05db5a976a5fbdf2