[INFO] fetching crate syn-args 0.4.1...
[INFO] testing syn-args-0.4.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate syn-args 0.4.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate syn-args 0.4.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate syn-args 0.4.1
[INFO] tweaked toml for crates.io crate syn-args 0.4.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate syn-args 0.4.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate syn-args 0.4.1 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d018e89808ddff623d40ff7f9c93e1ded0414711793e55bc5e4cd41a3c98e5c5
[INFO] running `Command { std: "docker" "start" "-a" "d018e89808ddff623d40ff7f9c93e1ded0414711793e55bc5e4cd41a3c98e5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d018e89808ddff623d40ff7f9c93e1ded0414711793e55bc5e4cd41a3c98e5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d018e89808ddff623d40ff7f9c93e1ded0414711793e55bc5e4cd41a3c98e5c5", kill_on_drop: false }`
[INFO] [stdout] d018e89808ddff623d40ff7f9c93e1ded0414711793e55bc5e4cd41a3c98e5c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bca18be1052e72c2fd31df1c83bb2ada4986b4e803659f1fe5d8a833cc080b71
[INFO] running `Command { std: "docker" "start" "-a" "bca18be1052e72c2fd31df1c83bb2ada4986b4e803659f1fe5d8a833cc080b71", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling syn-args-derive v0.3.1
[INFO] [stderr]    Compiling syn-args v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/macro_args/def/extends.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn try_from(value: &Value) -> Result<Self, Self::Error> {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.56s
[INFO] running `Command { std: "docker" "inspect" "bca18be1052e72c2fd31df1c83bb2ada4986b4e803659f1fe5d8a833cc080b71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bca18be1052e72c2fd31df1c83bb2ada4986b4e803659f1fe5d8a833cc080b71", kill_on_drop: false }`
[INFO] [stdout] bca18be1052e72c2fd31df1c83bb2ada4986b4e803659f1fe5d8a833cc080b71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0d97bfccf8a0e9d6c3eef20f689feb6d8e333d0f879e10e065ce227d8435a52
[INFO] running `Command { std: "docker" "start" "-a" "c0d97bfccf8a0e9d6c3eef20f689feb6d8e333d0f879e10e065ce227d8435a52", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/macro_args/def/extends.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn try_from(value: &Value) -> Result<Self, Self::Error> {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling syn-args v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:493:13
[INFO] [stdout]     |
[INFO] [stdout] 493 |             #[rustc_box]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:514:17
[INFO] [stdout]     |
[INFO] [stdout] 514 |                 #[rustc_box]
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:537:13
[INFO] [stdout]     |
[INFO] [stdout] 537 |             #[rustc_box]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:574:13
[INFO] [stdout]     |
[INFO] [stdout] 574 |             #[rustc_box]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:611:13
[INFO] [stdout]     |
[INFO] [stdout] 611 |             #[rustc_box]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:677:17
[INFO] [stdout]     |
[INFO] [stdout] 677 |                 #[rustc_box]
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:711:13
[INFO] [stdout]     |
[INFO] [stdout] 711 |             #[rustc_box]
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:744:17
[INFO] [stdout]     |
[INFO] [stdout] 744 |                 #[rustc_box]
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:493:15
[INFO] [stdout]     |
[INFO] [stdout] 493 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:514:19
[INFO] [stdout]     |
[INFO] [stdout] 514 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:537:15
[INFO] [stdout]     |
[INFO] [stdout] 537 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:541:25
[INFO] [stdout]     |
[INFO] [stdout] 541 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:549:25
[INFO] [stdout]     |
[INFO] [stdout] 549 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:541:27
[INFO] [stdout]     |
[INFO] [stdout] 541 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:549:27
[INFO] [stdout]     |
[INFO] [stdout] 549 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:574:15
[INFO] [stdout]     |
[INFO] [stdout] 574 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:578:25
[INFO] [stdout]     |
[INFO] [stdout] 578 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:586:25
[INFO] [stdout]     |
[INFO] [stdout] 586 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:578:27
[INFO] [stdout]     |
[INFO] [stdout] 578 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:586:27
[INFO] [stdout]     |
[INFO] [stdout] 586 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:611:15
[INFO] [stdout]     |
[INFO] [stdout] 611 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:615:25
[INFO] [stdout]     |
[INFO] [stdout] 615 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:623:25
[INFO] [stdout]     |
[INFO] [stdout] 623 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:615:27
[INFO] [stdout]     |
[INFO] [stdout] 615 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:623:27
[INFO] [stdout]     |
[INFO] [stdout] 623 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:677:19
[INFO] [stdout]     |
[INFO] [stdout] 677 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:711:15
[INFO] [stdout]     |
[INFO] [stdout] 711 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> examples/test-expand.rs:716:25
[INFO] [stdout]     |
[INFO] [stdout] 716 |                         #[rustc_box]
[INFO] [stdout]     |                         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
[INFO] [stdout]     = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:716:27
[INFO] [stdout]     |
[INFO] [stdout] 716 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> examples/test-expand.rs:744:19
[INFO] [stdout]     |
[INFO] [stdout] 744 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:493:15
[INFO] [stdout]     |
[INFO] [stdout] 493 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:514:19
[INFO] [stdout]     |
[INFO] [stdout] 514 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:537:15
[INFO] [stdout]     |
[INFO] [stdout] 537 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:541:27
[INFO] [stdout]     |
[INFO] [stdout] 541 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:549:27
[INFO] [stdout]     |
[INFO] [stdout] 549 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:574:15
[INFO] [stdout]     |
[INFO] [stdout] 574 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:578:27
[INFO] [stdout]     |
[INFO] [stdout] 578 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:586:27
[INFO] [stdout]     |
[INFO] [stdout] 586 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:611:15
[INFO] [stdout]     |
[INFO] [stdout] 611 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:615:27
[INFO] [stdout]     |
[INFO] [stdout] 615 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:623:27
[INFO] [stdout]     |
[INFO] [stdout] 623 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:677:19
[INFO] [stdout]     |
[INFO] [stdout] 677 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:711:15
[INFO] [stdout]     |
[INFO] [stdout] 711 |             #[rustc_box]
[INFO] [stdout]     |               ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:716:27
[INFO] [stdout]     |
[INFO] [stdout] 716 |                         #[rustc_box]
[INFO] [stdout]     |                           ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_box` in this scope
[INFO] [stdout]    --> examples/test-expand.rs:744:19
[INFO] [stdout]     |
[INFO] [stdout] 744 |                 #[rustc_box]
[INFO] [stdout]     |                   ^^^^^^^^^ help: a built-in attribute with a similar name exists: `rustc_abi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn-args` (example "test-expand") due to 45 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: type `T1` is more private than the item `ModuleArgs::F8::0`
[INFO] [stdout]   --> examples/test.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     F8(def::Option<T1>),
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^ field `ModuleArgs::F8::0` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `T1` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> examples/test.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct T1 {
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_value_p1` is never used
[INFO] [stdout]    --> examples/test.rs:189:4
[INFO] [stdout]     |
[INFO] [stdout] 189 | fn test_value_p1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/macro_args/def/extends.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn try_from(value: &Value) -> Result<Self, Self::Error> {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/lib.rs:39:33
[INFO] [stdout]    |
[INFO] [stdout] 39 |             if let Value::Array(args) = v {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `T1` is more private than the item `ModuleArgs::F8::0`
[INFO] [stdout]    --> src/lib.rs:32:12
[INFO] [stdout]     |
[INFO] [stdout]  32 |         F8(def::Option<T1>),
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ field `ModuleArgs::F8::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `T1` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/lib.rs:266:5
[INFO] [stdout]     |
[INFO] [stdout] 266 |     struct T1 {
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_value_p1` is never used
[INFO] [stdout]    --> src/lib.rs:463:8
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn test_value_p1() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c0d97bfccf8a0e9d6c3eef20f689feb6d8e333d0f879e10e065ce227d8435a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0d97bfccf8a0e9d6c3eef20f689feb6d8e333d0f879e10e065ce227d8435a52", kill_on_drop: false }`
[INFO] [stdout] c0d97bfccf8a0e9d6c3eef20f689feb6d8e333d0f879e10e065ce227d8435a52