[INFO] fetching crate overloading 0.1.2...
[INFO] testing overloading-0.1.2 against master#0d162b25edd5bf0dba9a22e83b614f1113e90474 for pr-150681
[INFO] extracting crate overloading 0.1.2 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate overloading 0.1.2
[INFO] finished tweaking crates.io crate overloading 0.1.2
[INFO] tweaked toml for crates.io crate overloading 0.1.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate overloading 0.1.2 on toolchain 0d162b25edd5bf0dba9a22e83b614f1113e90474
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "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" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[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" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5052a7456b92325642ae96095706016813eb6339529fba7cab425118d90d497c
[INFO] running `Command { std: "docker" "start" "-a" "5052a7456b92325642ae96095706016813eb6339529fba7cab425118d90d497c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5052a7456b92325642ae96095706016813eb6339529fba7cab425118d90d497c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5052a7456b92325642ae96095706016813eb6339529fba7cab425118d90d497c", kill_on_drop: false }`
[INFO] [stdout] 5052a7456b92325642ae96095706016813eb6339529fba7cab425118d90d497c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f692e4359e96ba428d2888d92fd9a5fe6ca88f647e2e5d0d5cf9da1d0f42a6fc
[INFO] running `Command { std: "docker" "start" "-a" "f692e4359e96ba428d2888d92fd9a5fe6ca88f647e2e5d0d5cf9da1d0f42a6fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling overloading v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.77s
[INFO] running `Command { std: "docker" "inspect" "f692e4359e96ba428d2888d92fd9a5fe6ca88f647e2e5d0d5cf9da1d0f42a6fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f692e4359e96ba428d2888d92fd9a5fe6ca88f647e2e5d0d5cf9da1d0f42a6fc", kill_on_drop: false }`
[INFO] [stdout] f692e4359e96ba428d2888d92fd9a5fe6ca88f647e2e5d0d5cf9da1d0f42a6fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e525990cc89c165b6838de67dd2d478dcc575ffe296fb07c550f60e742e55727
[INFO] running `Command { std: "docker" "start" "-a" "e525990cc89c165b6838de67dd2d478dcc575ffe296fb07c550f60e742e55727", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling overloading v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.15s
[INFO] running `Command { std: "docker" "inspect" "e525990cc89c165b6838de67dd2d478dcc575ffe296fb07c550f60e742e55727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e525990cc89c165b6838de67dd2d478dcc575ffe296fb07c550f60e742e55727", kill_on_drop: false }`
[INFO] [stdout] e525990cc89c165b6838de67dd2d478dcc575ffe296fb07c550f60e742e55727
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b92aa42dd13c0a7d66a3cdc55738195d590cd0ed8e7949e6d981115e400ddf10
[INFO] running `Command { std: "docker" "start" "-a" "b92aa42dd13c0a7d66a3cdc55738195d590cd0ed8e7949e6d981115e400ddf10", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/overloading-c00d4cdce9d8c316)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test_overloading.rs (/opt/rustwide/target/debug/deps/test_overloading-9cde3609c638d5c2)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests overloading
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stdout] test src/lib.rs - (line 39) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 39) stdout ----
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     extern "rust-call" fn call_once(self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     extern "rust-call" fn call_mut(&mut self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     extern "rust-call" fn call(&self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     extern "rust-call" fn call_once(self, _: ()) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     extern "rust-call" fn call_mut(&mut self, _: ()) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the extern "rust-call" ABI is experimental and subject to change
[INFO] [stdout]   --> src/lib.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     extern "rust-call" fn call(&self, _: ()) -> Self::Output {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     extern "rust-call" fn call_once(self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     extern "rust-call" fn call_mut(&mut self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     extern "rust-call" fn call(&self, (abc,): (String,)) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     extern "rust-call" fn call_once(self, _: ()) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     extern "rust-call" fn call_mut(&mut self, _: ()) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]   --> src/lib.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     extern "rust-call" fn call(&self, _: ()) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:42:6
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl std::ops::FnOnce<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `FnOnce` are experimental
[INFO] [stdout]   --> src/lib.rs:42:6
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl std::ops::FnOnce<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^ manual implementations of `FnOnce` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl std::ops::FnOnce<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `FnOnce` are experimental
[INFO] [stdout]   --> src/lib.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl std::ops::FnOnce<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^ manual implementations of `FnOnce` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl std::ops::FnMut<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `FnMut` are experimental
[INFO] [stdout]   --> src/lib.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl std::ops::FnMut<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^ manual implementations of `FnMut` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:64:6
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl std::ops::FnMut<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `FnMut` are experimental
[INFO] [stdout]   --> src/lib.rs:64:6
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl std::ops::FnMut<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^ manual implementations of `FnMut` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:53:6
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl std::ops::Fn<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `Fn` are experimental
[INFO] [stdout]   --> src/lib.rs:53:6
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl std::ops::Fn<(String,)> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^ manual implementations of `Fn` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
[INFO] [stdout]   --> src/lib.rs:69:6
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl std::ops::Fn<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-01-05; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] error[E0183]: manual implementations of `Fn` are experimental
[INFO] [stdout]   --> src/lib.rs:69:6
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl std::ops::Fn<()> for overloaded {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^ manual implementations of `Fn` are experimental
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 24 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0183, E0658.
[INFO] [stdout] For more information about an error, try `rustc --explain E0183`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 39)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b92aa42dd13c0a7d66a3cdc55738195d590cd0ed8e7949e6d981115e400ddf10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b92aa42dd13c0a7d66a3cdc55738195d590cd0ed8e7949e6d981115e400ddf10", kill_on_drop: false }`
[INFO] [stdout] b92aa42dd13c0a7d66a3cdc55738195d590cd0ed8e7949e6d981115e400ddf10
