[INFO] fetching crate v4l 0.14.0...
[INFO] testing v4l-0.14.0 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate v4l 0.14.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate v4l 0.14.0
[INFO] finished tweaking crates.io crate v4l 0.14.0
[INFO] tweaked toml for crates.io crate v4l 0.14.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate v4l 0.14.0 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate v4l 0.14.0 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.7
[INFO] [stderr]   Downloaded core-video-sys v0.1.4
[INFO] [stderr]   Downloaded line_drawing v0.7.0
[INFO] [stderr]   Downloaded v4l2-sys-mit v0.3.0
[INFO] [stderr]   Downloaded which v4.2.4
[INFO] [stderr]   Downloaded prettyplease v0.2.4
[INFO] [stderr]   Downloaded backtrace v0.3.64
[INFO] [stderr]   Downloaded ndk-sys v0.1.0
[INFO] [stderr]   Downloaded glutin_emscripten_sys v0.1.1
[INFO] [stderr]   Downloaded core-graphics v0.19.2
[INFO] [stderr]   Downloaded android_log-sys v0.1.2
[INFO] [stderr]   Downloaded wayland-scanner v0.23.6
[INFO] [stderr]   Downloaded ndk-glue v0.1.0
[INFO] [stderr]   Downloaded cocoa v0.20.2
[INFO] [stderr]   Downloaded glutin v0.24.1
[INFO] [stderr]   Downloaded raw-window-handle v0.3.4
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.5
[INFO] [stderr]   Downloaded object v0.27.1
[INFO] [stderr]   Downloaded wayland-protocols v0.23.6
[INFO] [stderr]   Downloaded nix v0.14.1
[INFO] [stderr]   Downloaded takeable-option v0.5.0
[INFO] [stderr]   Downloaded xdg v2.4.0
[INFO] [stderr]   Downloaded glium v0.27.0
[INFO] [stderr]   Downloaded wayland-commons v0.23.6
[INFO] [stderr]   Downloaded gimli v0.26.1
[INFO] [stderr]   Downloaded android_glue v0.2.3
[INFO] [stderr]   Downloaded winit v0.22.2
[INFO] [stderr]   Downloaded ndk v0.1.0
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.6.6
[INFO] [stderr]   Downloaded x11-dl v2.19.1
[INFO] [stderr]   Downloaded dlib v0.4.2
[INFO] [stderr]   Downloaded wayland-client v0.23.6
[INFO] [stderr]   Downloaded pkg-config v0.3.24
[INFO] [stderr]   Downloaded wayland-sys v0.23.6
[INFO] [stderr]   Downloaded num_enum_derive v0.4.3
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.7
[INFO] [stderr]   Downloaded num_enum v0.4.3
[INFO] [stderr]   Downloaded raw-window-handle v0.4.2
[INFO] [stderr]   Downloaded getrandom v0.2.5
[INFO] [stderr]   Downloaded calloop v0.4.4
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.7
[INFO] [stderr]   Downloaded jpeg-decoder v0.2.2
[INFO] [stderr]   Downloaded nom v7.1.0
[INFO] [stderr]   Downloaded libc v0.2.119
[INFO] [stderr]   Downloaded v4l-sys v0.3.0
[INFO] [stderr]   Downloaded andrew v0.2.1
[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" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 330ec3636ff19fa36e1194d7872d80cdaeaffe92d01e62bedc1bc57957158d13
[INFO] running `Command { std: "docker" "start" "-a" "330ec3636ff19fa36e1194d7872d80cdaeaffe92d01e62bedc1bc57957158d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "330ec3636ff19fa36e1194d7872d80cdaeaffe92d01e62bedc1bc57957158d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "330ec3636ff19fa36e1194d7872d80cdaeaffe92d01e62bedc1bc57957158d13", kill_on_drop: false }`
[INFO] [stdout] 330ec3636ff19fa36e1194d7872d80cdaeaffe92d01e62bedc1bc57957158d13
[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" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d025dc68e8bc95d62aec16e953ce421beff0411f93d0398454809067b17cbd9e
[INFO] running `Command { std: "docker" "start" "-a" "d025dc68e8bc95d62aec16e953ce421beff0411f93d0398454809067b17cbd9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling prettyplease v0.2.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling bindgen v0.65.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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] [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" "d025dc68e8bc95d62aec16e953ce421beff0411f93d0398454809067b17cbd9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d025dc68e8bc95d62aec16e953ce421beff0411f93d0398454809067b17cbd9e", kill_on_drop: false }`
[INFO] [stdout] d025dc68e8bc95d62aec16e953ce421beff0411f93d0398454809067b17cbd9e