[INFO] fetching crate rustc-ap-rustc_expand 680.0.0...
[INFO] checking rustc-ap-rustc_expand-680.0.0 against try#075992eda207e1647b699c8c8ada67b32ce7b115 for pr-77271
[INFO] extracting crate rustc-ap-rustc_expand 680.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rustc-ap-rustc_expand 680.0.0 on toolchain 075992eda207e1647b699c8c8ada67b32ce7b115
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustc-ap-rustc_expand 680.0.0
[INFO] finished tweaking crates.io crate rustc-ap-rustc_expand 680.0.0
[INFO] tweaked toml for crates.io crate rustc-ap-rustc_expand 680.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+075992eda207e1647b699c8c8ada67b32ce7b115" "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] 65d3a27fb19a9a23c986c9e81d46920f62a4ea38e6f97eeb800e4a134de877de
[INFO] running `Command { std: "docker" "start" "-a" "65d3a27fb19a9a23c986c9e81d46920f62a4ea38e6f97eeb800e4a134de877de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65d3a27fb19a9a23c986c9e81d46920f62a4ea38e6f97eeb800e4a134de877de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d3a27fb19a9a23c986c9e81d46920f62a4ea38e6f97eeb800e4a134de877de", kill_on_drop: false }`
[INFO] [stdout] 65d3a27fb19a9a23c986c9e81d46920f62a4ea38e6f97eeb800e4a134de877de
[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" "+075992eda207e1647b699c8c8ada67b32ce7b115" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40da4de6a41663a1eabb2d52f1ddd8b94874fe7d95f1926b4d218f39f717e940
[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" "40da4de6a41663a1eabb2d52f1ddd8b94874fe7d95f1926b4d218f39f717e940", kill_on_drop: false }`
[INFO] [stderr]     Checking annotate-snippets v0.8.0
[INFO] [stderr]     Checking rustc-ap-rustc_fs_util v680.0.0
[INFO] [stderr]     Checking version_check v0.9.2
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v680.0.0
[INFO] [stderr]     Checking termize v0.1.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rustc-ap-rustc_target v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_feature v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v680.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_ast 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" "40da4de6a41663a1eabb2d52f1ddd8b94874fe7d95f1926b4d218f39f717e940", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40da4de6a41663a1eabb2d52f1ddd8b94874fe7d95f1926b4d218f39f717e940", kill_on_drop: false }`
[INFO] [stdout] 40da4de6a41663a1eabb2d52f1ddd8b94874fe7d95f1926b4d218f39f717e940