[INFO] fetching crate flo_draw 0.3.1...
[INFO] checking flo_draw-0.3.1 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate flo_draw 0.3.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate flo_draw 0.3.1 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo_draw 0.3.1
[INFO] finished tweaking crates.io crate flo_draw 0.3.1
[INFO] tweaked toml for crates.io crate flo_draw 0.3.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate flo_draw 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.8
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.6
[INFO] [stderr]   Downloaded wayland-egl v0.28.6
[INFO] [stderr]   Downloaded net2 v0.2.38
[INFO] [stderr]   Downloaded xdg v2.4.1
[INFO] [stderr]   Downloaded glutin v0.26.0
[INFO] [stderr]   Downloaded serde v1.0.154
[INFO] [stderr]   Downloaded float_next_after v0.1.5
[INFO] [stderr]   Downloaded lyon v0.17.10
[INFO] [stderr]   Downloaded flo_canvas_events v0.3.1
[INFO] [stderr]   Downloaded lyon_path v0.17.7
[INFO] [stderr]   Downloaded gl v0.14.0
[INFO] [stderr]   Downloaded sid v0.6.1
[INFO] [stderr]   Downloaded flo_binding v2.2.0
[INFO] [stderr]   Downloaded clang-sys v0.29.3
[INFO] [stderr]   Downloaded flo_render_gl_offscreen v0.3.1
[INFO] [stderr]   Downloaded flo_rope v0.2.0
[INFO] [stderr]   Downloaded desync v0.8.2
[INFO] [stderr]   Downloaded similar v2.2.1
[INFO] [stderr]   Downloaded allsorts v0.5.1
[INFO] [stderr]   Downloaded flo_canvas v0.3.1
[INFO] [stderr]   Downloaded bindgen v0.54.0
[INFO] [stderr]   Downloaded lyon_tessellation v0.17.10
[INFO] [stderr]   Downloaded flo_curves v0.6.1
[INFO] [stderr]   Downloaded glyph-names v0.1.0
[INFO] [stderr]   Downloaded rust-hsluv v0.1.4
[INFO] [stderr]   Downloaded rental v0.5.6
[INFO] [stderr]   Downloaded unicode-general-category v0.3.0
[INFO] [stderr]   Downloaded desync v0.7.2
[INFO] [stderr]   Downloaded roots v0.0.7
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.1
[INFO] [stderr]   Downloaded flo_render v0.3.1
[INFO] [stderr]   Downloaded winit v0.24.0
[INFO] [stderr]   Downloaded libz-sys v1.1.8
[INFO] [stderr]   Downloaded rental-impl v0.5.5
[INFO] [stderr]   Downloaded unicode-joining-type v0.4.0
[INFO] [stderr]   Downloaded pest v2.5.6
[INFO] [stderr]   Downloaded serde_derive v1.0.154
[INFO] [stderr]   Downloaded bitreader v0.3.6
[INFO] [stderr]   Downloaded ucd-trie v0.1.5
[INFO] [stderr]   Downloaded lyon_algorithms v0.17.7
[INFO] [stderr]   Downloaded lyon_geom v0.17.7
[INFO] [stderr]   Downloaded flo_render_canvas v0.3.1
[INFO] [stderr]   Downloaded flo_stream v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a4b1f24e9cb4e603dac498e004042f4e34d71f36933311a7da889b1bda7642b
[INFO] running `Command { std: "docker" "start" "-a" "8a4b1f24e9cb4e603dac498e004042f4e34d71f36933311a7da889b1bda7642b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a4b1f24e9cb4e603dac498e004042f4e34d71f36933311a7da889b1bda7642b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a4b1f24e9cb4e603dac498e004042f4e34d71f36933311a7da889b1bda7642b", kill_on_drop: false }`
[INFO] [stdout] 8a4b1f24e9cb4e603dac498e004042f4e34d71f36933311a7da889b1bda7642b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30008ecccec0de247d1cf45aa425b41074e07e147bc2bbd991f42759f50985a7
[INFO] running `Command { std: "docker" "start" "-a" "30008ecccec0de247d1cf45aa425b41074e07e147bc2bbd991f42759f50985a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling slab v0.4.8
[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]     Checking smallvec v1.10.0
[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" "30008ecccec0de247d1cf45aa425b41074e07e147bc2bbd991f42759f50985a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30008ecccec0de247d1cf45aa425b41074e07e147bc2bbd991f42759f50985a7", kill_on_drop: false }`
[INFO] [stdout] 30008ecccec0de247d1cf45aa425b41074e07e147bc2bbd991f42759f50985a7