[INFO] fetching crate vga-figures 0.2.0...
[INFO] checking vga-figures-0.2.0 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate vga-figures 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate vga-figures 0.2.0 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vga-figures 0.2.0
[INFO] finished tweaking crates.io crate vga-figures 0.2.0
[INFO] tweaked toml for crates.io crate vga-figures 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded vga v0.2.4
[INFO] [stderr]   Downloaded font8x8 v0.2.5
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded x86_64 v0.11.8
[INFO] [stderr]   Downloaded spinning_top v0.1.1
[INFO] [stderr]   Downloaded conquer-once v0.2.1
[INFO] [stderr]   Downloaded conquer-util v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1f303b9c01a5bcdee6b2fa86dc181822cee956222f77a07585464f17f12ae0a7
[INFO] running `Command { std: "docker" "start" "-a" "1f303b9c01a5bcdee6b2fa86dc181822cee956222f77a07585464f17f12ae0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f303b9c01a5bcdee6b2fa86dc181822cee956222f77a07585464f17f12ae0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f303b9c01a5bcdee6b2fa86dc181822cee956222f77a07585464f17f12ae0a7", kill_on_drop: false }`
[INFO] [stdout] 1f303b9c01a5bcdee6b2fa86dc181822cee956222f77a07585464f17f12ae0a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79be49cf6c0fc6ac8363e5e2b8dac3c5109999a6e66d9a7495c09df32ad9a410
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "79be49cf6c0fc6ac8363e5e2b8dac3c5109999a6e66d9a7495c09df32ad9a410", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.11.8
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking conquer-util v0.2.0
[INFO] [stderr]     Checking font8x8 v0.2.5
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking conquer-once v0.2.1
[INFO] [stderr]     Checking spinning_top v0.1.1
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/x86_64-0.11.8/src/structures/idt.rs:378:31
[INFO] [stdout]     |
[INFO] [stdout] 378 |                 divide_error: Entry::missing(),
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]     = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "79be49cf6c0fc6ac8363e5e2b8dac3c5109999a6e66d9a7495c09df32ad9a410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79be49cf6c0fc6ac8363e5e2b8dac3c5109999a6e66d9a7495c09df32ad9a410", kill_on_drop: false }`
[INFO] [stdout] 79be49cf6c0fc6ac8363e5e2b8dac3c5109999a6e66d9a7495c09df32ad9a410