[INFO] cloning repository https://github.com/ivanfourie/softbuffer_experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ivanfourie/softbuffer_experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanfourie%2Fsoftbuffer_experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanfourie%2Fsoftbuffer_experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2702782fcb3391323ce6e5ea466cc6e32c2f99b4
[INFO] checking ivanfourie/softbuffer_experiment against try#2c4e58eac5a232e49065e517c1cf50b2715ccf85 for pr-140283
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanfourie%2Fsoftbuffer_experiment" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ivanfourie/softbuffer_experiment
[INFO] finished tweaking git repo https://github.com/ivanfourie/softbuffer_experiment
[INFO] tweaked toml for git repo https://github.com/ivanfourie/softbuffer_experiment written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ivanfourie/softbuffer_experiment on toolchain 2c4e58eac5a232e49065e517c1cf50b2715ccf85
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ivanfourie/softbuffer_experiment 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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-windowing/softbuffer`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wayland-scanner v0.30.0
[INFO] [stderr]   Downloaded x11-dl v2.20.1
[INFO] [stderr]   Downloaded quick-xml v0.23.1
[INFO] [stderr]   Downloaded nix v0.26.1
[INFO] [stderr]   Downloaded x11rb v0.11.0
[INFO] [stderr]   Downloaded wayland-backend v0.1.0
[INFO] [stderr]   Downloaded x11rb-protocol v0.11.0
[INFO] [stderr]   Downloaded wayland-client v0.30.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f9e17f981630eb374ca0b94bc67d32fcb185adc91a3d34cb1d2962d16a99eec
[INFO] running `Command { std: "docker" "start" "-a" "8f9e17f981630eb374ca0b94bc67d32fcb185adc91a3d34cb1d2962d16a99eec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f9e17f981630eb374ca0b94bc67d32fcb185adc91a3d34cb1d2962d16a99eec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f9e17f981630eb374ca0b94bc67d32fcb185adc91a3d34cb1d2962d16a99eec", kill_on_drop: false }`
[INFO] [stdout] 8f9e17f981630eb374ca0b94bc67d32fcb185adc91a3d34cb1d2962d16a99eec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bee006db941bc3ea73e4c53eb6e91ba215f963ff4903e94eb32ee5ac16e03ec
[INFO] running `Command { std: "docker" "start" "-a" "0bee006db941bc3ea73e4c53eb6e91ba215f963ff4903e94eb32ee5ac16e03ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]    Compiling slotmap v1.0.6
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking bytemuck v1.12.3
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking nix v0.25.1
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]     Checking cty v0.2.2
[INFO] [stderr]     Checking foreign-types-shared v0.3.1
[INFO] [stderr]     Checking tiny-skia-path v0.7.0
[INFO] [stderr]     Checking safe_arch v0.5.2
[INFO] [stderr]     Checking memmap2 v0.5.8
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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]     Checking parking_lot_core v0.9.5
[INFO] [stderr]     Checking raw-window-handle v0.5.0
[INFO] [stderr]     Checking gethostname v0.2.3
[INFO] [stderr]     Checking raw-window-handle v0.4.3
[INFO] [stderr]     Checking flate2 v1.0.25
[INFO] [stderr]     Checking nix v0.26.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[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" "0bee006db941bc3ea73e4c53eb6e91ba215f963ff4903e94eb32ee5ac16e03ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bee006db941bc3ea73e4c53eb6e91ba215f963ff4903e94eb32ee5ac16e03ec", kill_on_drop: false }`
[INFO] [stdout] 0bee006db941bc3ea73e4c53eb6e91ba215f963ff4903e94eb32ee5ac16e03ec