[INFO] fetching crate revent 0.29.0...
[INFO] testing revent-0.29.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate revent 0.29.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate revent 0.29.0
[INFO] finished tweaking crates.io crate revent 0.29.0
[INFO] tweaked toml for crates.io crate revent 0.29.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate revent 0.29.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate revent 0.29.0 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded isize-vec v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7ce41b8f573e11da58431c2e2a3d8d4942972727120eaf66bbb55c932c1876f
[INFO] running `Command { std: "docker" "start" "-a" "e7ce41b8f573e11da58431c2e2a3d8d4942972727120eaf66bbb55c932c1876f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7ce41b8f573e11da58431c2e2a3d8d4942972727120eaf66bbb55c932c1876f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7ce41b8f573e11da58431c2e2a3d8d4942972727120eaf66bbb55c932c1876f", kill_on_drop: false }`
[INFO] [stdout] e7ce41b8f573e11da58431c2e2a3d8d4942972727120eaf66bbb55c932c1876f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb98ef1b5d5582b42e0fc8c9998e3b6cb4c4eaece5de7ce0a656d17597a39fb5
[INFO] running `Command { std: "docker" "start" "-a" "fb98ef1b5d5582b42e0fc8c9998e3b6cb4c4eaece5de7ce0a656d17597a39fb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling isize-vec v0.1.1
[INFO] [stderr]    Compiling revent v0.29.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: unnecessary qualification
[INFO] [stdout]   --> src/node.rs:48:19
[INFO] [stdout]    |
[INFO] [stdout] 48 |             size: mem::size_of::<T>(),
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     unused_qualifications
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 48 -             size: mem::size_of::<T>(),
[INFO] [stdout] 48 +             size: size_of::<T>(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary qualification
[INFO] [stdout]   --> src/node.rs:63:19
[INFO] [stdout]    |
[INFO] [stdout] 63 |             size: mem::size_of::<T>(),
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 63 -             size: mem::size_of::<T>(),
[INFO] [stdout] 63 +             size: size_of::<T>(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary qualification
[INFO] [stdout]    --> src/lib.rs:147:51
[INFO] [stdout]     |
[INFO] [stdout] 147 |         if last.1 != item as *mut () || last.2 != mem::size_of::<Self>() {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 147 -         if last.1 != item as *mut () || last.2 != mem::size_of::<Self>() {
[INFO] [stdout] 147 +         if last.1 != item as *mut () || last.2 != size_of::<Self>() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]   --> src/lib.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![feature(coerce_unsized, drain_filter, unsize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `(Cell<isize>, UnsafeCell<T>): Unsize<(Cell<isize>, UnsafeCell<U>)>` is not satisfied
[INFO] [stdout]   --> src/node.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | / impl<T, U> CoerceUnsized<Node<U>> for Node<T>
[INFO] [stdout] 26 | | where
[INFO] [stdout] 27 | |     T: Unsize<U> + ?Sized,
[INFO] [stdout] 28 | |     U: ?Sized,
[INFO] [stdout]    | |______________^ the trait `Unsize<(Cell<isize>, UnsafeCell<U>)>` is not implemented for `(Cell<isize>, UnsafeCell<T>)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: all implementations of `Unsize` are provided automatically by the compiler, see <https://doc.rust-lang.org/stable/std/marker/trait.Unsize.html> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `revent` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "fb98ef1b5d5582b42e0fc8c9998e3b6cb4c4eaece5de7ce0a656d17597a39fb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb98ef1b5d5582b42e0fc8c9998e3b6cb4c4eaece5de7ce0a656d17597a39fb5", kill_on_drop: false }`
[INFO] [stdout] fb98ef1b5d5582b42e0fc8c9998e3b6cb4c4eaece5de7ce0a656d17597a39fb5