[INFO] fetching crate cex_derive 0.5.2...
[INFO] testing cex_derive-0.5.2 against try#bd7d74411512a3dd3b35d2f699c51dd2557c7e7e+cargoflags=-Zbuild-dir-new-layout for pr-149852-1
[INFO] extracting crate cex_derive 0.5.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate cex_derive 0.5.2
[INFO] finished tweaking crates.io crate cex_derive 0.5.2
[INFO] tweaked toml for crates.io crate cex_derive 0.5.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cex_derive 0.5.2 on toolchain bd7d74411512a3dd3b35d2f699c51dd2557c7e7e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] [stderr]       Adding indexmap v1.9.3 (available: v2.13.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.114)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91719ee7e1917e11203cf7f08c2e2ecdc602e33ab98463473cbe6460121968ec
[INFO] running `Command { std: "docker" "start" "-a" "91719ee7e1917e11203cf7f08c2e2ecdc602e33ab98463473cbe6460121968ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91719ee7e1917e11203cf7f08c2e2ecdc602e33ab98463473cbe6460121968ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91719ee7e1917e11203cf7f08c2e2ecdc602e33ab98463473cbe6460121968ec", kill_on_drop: false }`
[INFO] [stdout] 91719ee7e1917e11203cf7f08c2e2ecdc602e33ab98463473cbe6460121968ec
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "build" "--frozen" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 84d51b09360e1a2dcff5cfa5007fb46a146f7ac93f671a6b9c2ab306feed3b30
[INFO] running `Command { std: "docker" "start" "-a" "84d51b09360e1a2dcff5cfa5007fb46a146f7ac93f671a6b9c2ab306feed3b30", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.105
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling quote v1.0.43
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling cex_derive v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.14s
[INFO] running `Command { std: "docker" "inspect" "84d51b09360e1a2dcff5cfa5007fb46a146f7ac93f671a6b9c2ab306feed3b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84d51b09360e1a2dcff5cfa5007fb46a146f7ac93f671a6b9c2ab306feed3b30", kill_on_drop: false }`
[INFO] [stdout] 84d51b09360e1a2dcff5cfa5007fb46a146f7ac93f671a6b9c2ab306feed3b30
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "--no-run" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 2cdfd0885cbfea04b98b114432cb3502219bdc379983e5f3e550377d78b54d27
[INFO] running `Command { std: "docker" "start" "-a" "2cdfd0885cbfea04b98b114432cb3502219bdc379983e5f3e550377d78b54d27", kill_on_drop: false }`
[INFO] [stderr]    Compiling cex_derive v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "2cdfd0885cbfea04b98b114432cb3502219bdc379983e5f3e550377d78b54d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cdfd0885cbfea04b98b114432cb3502219bdc379983e5f3e550377d78b54d27", kill_on_drop: false }`
[INFO] [stdout] 2cdfd0885cbfea04b98b114432cb3502219bdc379983e5f3e550377d78b54d27
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 56c6d62b22a231edad3e7eef7d2c49c4ef7f81609af3df914cb8c67d85db3162
[INFO] running `Command { std: "docker" "start" "-a" "56c6d62b22a231edad3e7eef7d2c49c4ef7f81609af3df914cb8c67d85db3162", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/cex_derive/d7b602cd4fcaa2d6/deps/cex_derive-d7b602cd4fcaa2d6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cex_derive
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - Result (line 639) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - Result (line 647) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - Result (line 629) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Result (line 639) stdout ----
[INFO] [stdout] error: expected `;`, found `}`
[INFO] [stdout]    --> src/lib.rs:641:62
[INFO] [stdout]     |
[INFO] [stdout] 641 |     let _f = #[cex] || -> Result!( i32 throws String ) {/**/}
[INFO] [stdout]     |                                                              ^ help: add `;` here
[INFO] [stdout] 642 | }
[INFO] [stdout]     | - unexpected token
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: attributes on expressions are experimental
[INFO] [stdout]    --> src/lib.rs:641:14
[INFO] [stdout]     |
[INFO] [stdout] 641 |     let _f = #[cex] || -> Result!( i32 throws String ) {/**/}
[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 2026-01-14; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `cex` in this scope
[INFO] [stdout]    --> src/lib.rs:641:16
[INFO] [stdout]     |
[INFO] [stdout] 641 |     let _f = #[cex] || -> Result!( i32 throws String ) {/**/}
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this attribute macro
[INFO] [stdout]     |
[INFO] [stdout] 639 + use cex_derive::cex;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `Result` in this scope
[INFO] [stdout]    --> src/lib.rs:641:27
[INFO] [stdout]     |
[INFO] [stdout] 641 |     let _f = #[cex] || -> Result!( i32 throws String ) {/**/}
[INFO] [stdout]     |                           ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Result` is in scope, but it is an enum, not a macro
[INFO] [stdout] help: consider importing this macro
[INFO] [stdout]     |
[INFO] [stdout] 639 + use cex_derive::Result;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Result (line 647) stdout ----
[INFO] [stdout] error: cannot find attribute `cex` in this scope
[INFO] [stdout]    --> src/lib.rs:649:7
[INFO] [stdout]     |
[INFO] [stdout] 649 |     #[cex] let v: Result!( i32 throws String ) = try {/**/};
[INFO] [stdout]     |       ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this attribute macro
[INFO] [stdout]     |
[INFO] [stdout] 647 + use cex_derive::cex;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `Result` in this scope
[INFO] [stdout]    --> src/lib.rs:649:19
[INFO] [stdout]     |
[INFO] [stdout] 649 |     #[cex] let v: Result!( i32 throws String ) = try {/**/};
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Result` is in scope, but it is an enum, not a macro
[INFO] [stdout] help: consider importing this macro
[INFO] [stdout]     |
[INFO] [stdout] 647 + use cex_derive::Result;
[INFO] [stdout]     |
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `try` expression is experimental
[INFO] [stdout]    --> src/lib.rs:649:50
[INFO] [stdout]     |
[INFO] [stdout] 649 |     #[cex] let v: Result!( i32 throws String ) = try {/**/};
[INFO] [stdout]     |                                                  ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31436 <https://github.com/rust-lang/rust/issues/31436> for more information
[INFO] [stdout]     = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-01-14; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a `try` block must return `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]    --> src/lib.rs:649:59
[INFO] [stdout]     |
[INFO] [stdout] 649 |     #[cex] let v: Result!( i32 throws String ) = try {/**/};
[INFO] [stdout]     |                                                           ^ could not wrap the final value of the block as `()` doesn't implement `Try`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Try` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0658.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Result (line 629) stdout ----
[INFO] [stdout] error: cannot find attribute `cex` in this scope
[INFO] [stdout]    --> src/lib.rs:634:3
[INFO] [stdout]     |
[INFO] [stdout] 634 | #[cex] fn foo() -> Result!( i32 throws String, &'static str, SomeError ) {/**/}
[INFO] [stdout]     |   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this attribute macro
[INFO] [stdout]     |
[INFO] [stdout] 629 + use cex_derive::cex;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `Result` in this scope
[INFO] [stdout]    --> src/lib.rs:634:20
[INFO] [stdout]     |
[INFO] [stdout] 634 | #[cex] fn foo() -> Result!( i32 throws String, &'static str, SomeError ) {/**/}
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Result` is in scope, but it is an enum, not a macro
[INFO] [stdout] help: consider importing this macro
[INFO] [stdout]     |
[INFO] [stdout] 629 + use cex_derive::Result;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `cex` in this scope
[INFO] [stdout]    --> src/lib.rs:630:3
[INFO] [stdout]     |
[INFO] [stdout] 630 | #[cex] fn throws_never() -> Result!(i32) {/**/}
[INFO] [stdout]     |   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this attribute macro
[INFO] [stdout]     |
[INFO] [stdout] 629 + use cex_derive::cex;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `Result` in this scope
[INFO] [stdout]    --> src/lib.rs:630:29
[INFO] [stdout]     |
[INFO] [stdout] 630 | #[cex] fn throws_never() -> Result!(i32) {/**/}
[INFO] [stdout]     |                             ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Result` is in scope, but it is an enum, not a macro
[INFO] [stdout] help: consider importing this macro
[INFO] [stdout]     |
[INFO] [stdout] 629 + use cex_derive::Result;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Result (line 629)
[INFO] [stdout]     src/lib.rs - Result (line 639)
[INFO] [stdout]     src/lib.rs - Result (line 647)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.25s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "56c6d62b22a231edad3e7eef7d2c49c4ef7f81609af3df914cb8c67d85db3162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56c6d62b22a231edad3e7eef7d2c49c4ef7f81609af3df914cb8c67d85db3162", kill_on_drop: false }`
[INFO] [stdout] 56c6d62b22a231edad3e7eef7d2c49c4ef7f81609af3df914cb8c67d85db3162
