[INFO] fetching crate verus_builtin 0.0.0-2026-05-17-0151...
[INFO] checking verus_builtin-0.0.0-2026-05-17-0151 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate verus_builtin 0.0.0-2026-05-17-0151 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate verus_builtin 0.0.0-2026-05-17-0151
[INFO] finished tweaking crates.io crate verus_builtin 0.0.0-2026-05-17-0151
[INFO] tweaked toml for crates.io crate verus_builtin 0.0.0-2026-05-17-0151 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate verus_builtin 0.0.0-2026-05-17-0151 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate verus_builtin 0.0.0-2026-05-17-0151 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a57cff30e867a40a5d50b8129e7af4f7ad7ff3175d6633d82e2f681ae5749320
[INFO] running `Command { std: "docker" "start" "-a" "a57cff30e867a40a5d50b8129e7af4f7ad7ff3175d6633d82e2f681ae5749320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a57cff30e867a40a5d50b8129e7af4f7ad7ff3175d6633d82e2f681ae5749320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a57cff30e867a40a5d50b8129e7af4f7ad7ff3175d6633d82e2f681ae5749320", kill_on_drop: false }`
[INFO] [stdout] a57cff30e867a40a5d50b8129e7af4f7ad7ff3175d6633d82e2f681ae5749320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8e5a0029f2a11618cd1d19ebb21c851a5ac59a09a3f916239c8c8e22b5752dc
[INFO] running `Command { std: "docker" "start" "-a" "d8e5a0029f2a11618cd1d19ebb21c851a5ac59a09a3f916239c8c8e22b5752dc", kill_on_drop: false }`
[INFO] [stderr]     Checking verus_builtin v0.0.0-2026-05-17-0151 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `SyncSendIfSyncSend` is never constructed
[INFO] [stdout]    --> src/lib.rs:862:12
[INFO] [stdout]     |
[INFO] [stdout] 862 | pub struct SyncSendIfSyncSend<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `SendIfSend` is never constructed
[INFO] [stdout]    --> src/lib.rs:882:12
[INFO] [stdout]     |
[INFO] [stdout] 882 | pub struct SendIfSend<T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `FnProof` is never constructed
[INFO] [stdout]     --> src/lib.rs:2019:12
[INFO] [stdout]      |
[INFO] [stdout] 2019 | pub struct FnProof<'a, Options, ArgModes, OutMode, Args, Output> {
[INFO] [stdout]      |            ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `FOpts` is never constructed
[INFO] [stdout]     --> src/lib.rs:2029:12
[INFO] [stdout]      |
[INFO] [stdout] 2029 | pub struct FOpts<const USAGE: u8, ReqEns, const COPY: u8, const SEND: u8, const SYNC: u8> {
[INFO] [stdout]      |            ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:842:6
[INFO] [stdout]     |
[INFO] [stdout] 842 | impl !Copy for NoCopy {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:848:6
[INFO] [stdout]     |
[INFO] [stdout] 848 | impl !Sync for NoSyncSend {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:850:6
[INFO] [stdout]     |
[INFO] [stdout] 850 | impl !Send for NoSyncSend {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `SyncSendIfSyncSend` is never constructed
[INFO] [stdout]    --> src/lib.rs:862:12
[INFO] [stdout]     |
[INFO] [stdout] 862 | pub struct SyncSendIfSyncSend<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `SendIfSend` is never constructed
[INFO] [stdout]    --> src/lib.rs:882:12
[INFO] [stdout]     |
[INFO] [stdout] 882 | pub struct SendIfSend<T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `FnProof` is never constructed
[INFO] [stdout]     --> src/lib.rs:2019:12
[INFO] [stdout]      |
[INFO] [stdout] 2019 | pub struct FnProof<'a, Options, ArgModes, OutMode, Args, Output> {
[INFO] [stdout]      |            ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `FOpts` is never constructed
[INFO] [stdout]     --> src/lib.rs:2029:12
[INFO] [stdout]      |
[INFO] [stdout] 2029 | pub struct FOpts<const USAGE: u8, ReqEns, const COPY: u8, const SEND: u8, const SYNC: u8> {
[INFO] [stdout]      |            ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `verus_builtin` (lib test) due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:842:6
[INFO] [stdout]     |
[INFO] [stdout] 842 | impl !Copy for NoCopy {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:848:6
[INFO] [stdout]     |
[INFO] [stdout] 848 | impl !Sync for NoSyncSend {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: negative impls are experimental
[INFO] [stdout]    --> src/lib.rs:850:6
[INFO] [stdout]     |
[INFO] [stdout] 850 | impl !Send for NoSyncSend {}
[INFO] [stdout]     |      ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-18; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `verus_builtin` (lib) due to 4 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d8e5a0029f2a11618cd1d19ebb21c851a5ac59a09a3f916239c8c8e22b5752dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8e5a0029f2a11618cd1d19ebb21c851a5ac59a09a3f916239c8c8e22b5752dc", kill_on_drop: false }`
[INFO] [stdout] d8e5a0029f2a11618cd1d19ebb21c851a5ac59a09a3f916239c8c8e22b5752dc
