[INFO] fetching crate rustc-ap-rustc_attr 680.0.0...
[INFO] checking rustc-ap-rustc_attr-680.0.0 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate rustc-ap-rustc_attr 680.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rustc-ap-rustc_attr 680.0.0 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustc-ap-rustc_attr 680.0.0
[INFO] finished tweaking crates.io crate rustc-ap-rustc_attr 680.0.0
[INFO] tweaked toml for crates.io crate rustc-ap-rustc_attr 680.0.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] f1ae5a4f2b58260b4fa801c13ad4cc9677154d6656e3098223152d8544a2fdce
[INFO] running `Command { std: "docker" "start" "-a" "f1ae5a4f2b58260b4fa801c13ad4cc9677154d6656e3098223152d8544a2fdce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1ae5a4f2b58260b4fa801c13ad4cc9677154d6656e3098223152d8544a2fdce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1ae5a4f2b58260b4fa801c13ad4cc9677154d6656e3098223152d8544a2fdce", kill_on_drop: false }`
[INFO] [stdout] f1ae5a4f2b58260b4fa801c13ad4cc9677154d6656e3098223152d8544a2fdce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc625667a77ff95dea9d416f7ee571c91cd199639d2496375d6d4fa5cc34db99
[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" "bc625667a77ff95dea9d416f7ee571c91cd199639d2496375d6d4fa5cc34db99", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking rustc-ap-rustc_graphviz v680.0.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking rustc-ap-rustc_fs_util v680.0.0
[INFO] [stderr]     Checking version_check v0.9.2
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_serialize v680.0.0
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v680.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]     Checking stacker v0.1.12
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking measureme v0.7.1
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking ena v0.14.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rustc-rayon-core v0.3.0
[INFO] [stderr]     Checking rustc-rayon v0.3.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rustc-ap-rustc_index v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_arena v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_span v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_target v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_ast v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_feature v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v680.0.0
[INFO] [stdout] error[E0658]: `transmute` is not allowed in constant functions
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_ast-680.0.0/src/ptr.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 std::mem::transmute(NonNull::<[T; 0]>::dangling() as NonNull<[T]>)
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #53605 <https://github.com/rust-lang/rust/issues/53605> for more information
[INFO] [stdout]     = help: add `#![feature(const_fn_transmute)]` to the crate attributes to enable
[INFO] [stdout]     = note: `transmute` is only allowed in constants and statics for now
[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 `rustc-ap-rustc_ast`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bc625667a77ff95dea9d416f7ee571c91cd199639d2496375d6d4fa5cc34db99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc625667a77ff95dea9d416f7ee571c91cd199639d2496375d6d4fa5cc34db99", kill_on_drop: false }`
[INFO] [stdout] bc625667a77ff95dea9d416f7ee571c91cd199639d2496375d6d4fa5cc34db99