[INFO] fetching crate tmp_vec 0.0.1...
[INFO] testing tmp_vec-0.0.1 against master#0d162b25edd5bf0dba9a22e83b614f1113e90474 for pr-150681
[INFO] extracting crate tmp_vec 0.0.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate tmp_vec 0.0.1
[INFO] finished tweaking crates.io crate tmp_vec 0.0.1
[INFO] tweaked toml for crates.io crate tmp_vec 0.0.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tmp_vec 0.0.1 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] 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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 8f370a03d0c9b46c411909944c0ba80943068a745ad71c9b463dfc08cc982ec3
[INFO] running `Command { std: "docker" "start" "-a" "8f370a03d0c9b46c411909944c0ba80943068a745ad71c9b463dfc08cc982ec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f370a03d0c9b46c411909944c0ba80943068a745ad71c9b463dfc08cc982ec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f370a03d0c9b46c411909944c0ba80943068a745ad71c9b463dfc08cc982ec3", kill_on_drop: false }`
[INFO] [stdout] 8f370a03d0c9b46c411909944c0ba80943068a745ad71c9b463dfc08cc982ec3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b8186cf831dec96212a894982756543232f7c8020ccc50965acb153c67f284fc
[INFO] running `Command { std: "docker" "start" "-a" "b8186cf831dec96212a894982756543232f7c8020ccc50965acb153c67f284fc", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling tmp_vec v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<T> {
[INFO] [stdout]    |                          ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<'_, T> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "b8186cf831dec96212a894982756543232f7c8020ccc50965acb153c67f284fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8186cf831dec96212a894982756543232f7c8020ccc50965acb153c67f284fc", kill_on_drop: false }`
[INFO] [stdout] b8186cf831dec96212a894982756543232f7c8020ccc50965acb153c67f284fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a5309454afb756192145a915bb697e32688dfc8f83e9ed2a3facc021891866b7
[INFO] running `Command { std: "docker" "start" "-a" "a5309454afb756192145a915bb697e32688dfc8f83e9ed2a3facc021891866b7", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling tmp_vec v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<T> {
[INFO] [stdout]    |                          ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<'_, T> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<T> {
[INFO] [stdout]    |                          ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<'_, T> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "a5309454afb756192145a915bb697e32688dfc8f83e9ed2a3facc021891866b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5309454afb756192145a915bb697e32688dfc8f83e9ed2a3facc021891866b7", kill_on_drop: false }`
[INFO] [stdout] a5309454afb756192145a915bb697e32688dfc8f83e9ed2a3facc021891866b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 63254e82b61ef1a452eaba5467677b1758f0e6cc68fc37eb255262f72b288636
[INFO] running `Command { std: "docker" "start" "-a" "63254e82b61ef1a452eaba5467677b1758f0e6cc68fc37eb255262f72b288636", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<T> {
[INFO] [stderr]    |                          ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                          |
[INFO] [stderr]    |                          the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn borrow_mut<T>(&mut self) -> BorrowMut<'_, T> {
[INFO] [stderr]    |                                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: `tmp_vec` (lib) generated 1 warning (run `cargo fix --lib -p tmp_vec` to apply 1 suggestion)
[INFO] [stderr] warning: `tmp_vec` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tmp_vec-4fb64298697b36cc)
[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 tmp_vec
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 19) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 3) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 19) stdout ----
[INFO] [stdout] error: expected identifier, found `...`
[INFO] [stdout]   --> src/lib.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Foo {
[INFO] [stdout]    |            --- while parsing this struct
[INFO] [stdout] 24 |     tmp_guards: TmpVec<Guard<'static>>,
[INFO] [stdout] 25 |     ...
[INFO] [stdout]    |     ^^^ expected identifier
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]   --> src/lib.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |          ...
[INFO] [stdout]    |          ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]    |
[INFO] [stdout] 31 -          ...
[INFO] [stdout] 31 +          ..
[INFO] [stdout]    |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout] 31 -          ...
[INFO] [stdout] 31 +          ..=
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]   --> src/lib.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 |          ...
[INFO] [stdout]    |          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] help: use `..` instead
[INFO] [stdout]    |
[INFO] [stdout] 31 -          ...
[INFO] [stdout] 31 +          ..
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: `...` is not supported for non-extern functions
[INFO] [stdout]   --> src/lib.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn do_something(&mut self, ...){
[INFO] [stdout]    |                                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: only `extern "C"` and `extern "C-unwind"` functions may have a C variable argument list
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `Guard` in this scope
[INFO] [stdout]   --> src/lib.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 |     tmp_guards: TmpVec<Guard<'static>>,
[INFO] [stdout]    |                        ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: C-variadic functions are unstable
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     fn do_something(&mut self, ...){
[INFO] [stdout] 30 | |          let mut guards = self.tmp_guards.borrow_mut();
[INFO] [stdout] 31 | |          ...
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #44930 <https://github.com/rust-lang/rust/issues/44930> for more information
[INFO] [stdout]    = help: add `#![feature(c_variadic)]` 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] warning: missing pattern for `...` argument
[INFO] [stdout]   --> src/lib.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn do_something(&mut self, ...){
[INFO] [stdout]    |                                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #145544 <https://github.com/rust-lang/rust/issues/145544>
[INFO] [stdout]    = note: `#[warn(varargs_without_pattern)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: name the argument, or use `_` to continue ignoring it
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn do_something(&mut self, _: ...){
[INFO] [stdout]    |                                ++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0586, E0658.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 3) stdout ----
[INFO] [stdout] error: expected identifier, found `...`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Foo {
[INFO] [stdout]   |            --- while parsing this struct
[INFO] [stdout] 5 |     ...
[INFO] [stdout]   |     ^^^ expected identifier
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]   --> src/lib.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         ...
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]    |
[INFO] [stdout] 12 -         ...
[INFO] [stdout] 12 +         ..
[INFO] [stdout]    |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout] 12 -         ...
[INFO] [stdout] 12 +         ..=
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]   --> src/lib.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         ...
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] help: use `..` instead
[INFO] [stdout]    |
[INFO] [stdout] 12 -         ...
[INFO] [stdout] 12 +         ..
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: `...` is not supported for non-extern functions
[INFO] [stdout]  --> src/lib.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn do_something(&mut self, ...){
[INFO] [stdout]   |                                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: only `extern "C"` and `extern "C-unwind"` functions may have a C variable argument list
[INFO] [stdout] 
[INFO] [stdout] error[E0261]: use of undeclared lifetime name `'x`
[INFO] [stdout]   --> src/lib.rs:11:35
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut guards: Vec<Guard<'x>> = Vec::with_capacity(xxx.len());
[INFO] [stdout]    |                                   ^^ undeclared lifetime
[INFO] [stdout]    |
[INFO] [stdout] help: consider introducing lifetime `'x` here
[INFO] [stdout]    |
[INFO] [stdout]  9 |     fn do_something<'x>(&mut self, ...){
[INFO] [stdout]    |                    ++++
[INFO] [stdout] help: consider introducing lifetime `'x` here
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<'x> Foo {
[INFO] [stdout]    |     ++++
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `Guard` in this scope
[INFO] [stdout]   --> src/lib.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut guards: Vec<Guard<'x>> = Vec::with_capacity(xxx.len());
[INFO] [stdout]    |                             ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `xxx` in this scope
[INFO] [stdout]   --> src/lib.rs:11:61
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut guards: Vec<Guard<'x>> = Vec::with_capacity(xxx.len());
[INFO] [stdout]    |                                                             ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: C-variadic functions are unstable
[INFO] [stdout]   --> src/lib.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     fn do_something(&mut self, ...){
[INFO] [stdout] 10 | |         //FIXME: avoid allocation. can't fix this because T is lifetime-bound.
[INFO] [stdout] 11 | |         let mut guards: Vec<Guard<'x>> = Vec::with_capacity(xxx.len());
[INFO] [stdout] 12 | |         ...
[INFO] [stdout] 13 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #44930 <https://github.com/rust-lang/rust/issues/44930> for more information
[INFO] [stdout]    = help: add `#![feature(c_variadic)]` 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] warning: missing pattern for `...` argument
[INFO] [stdout]  --> src/lib.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn do_something(&mut self, ...){
[INFO] [stdout]   |                                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #145544 <https://github.com/rust-lang/rust/issues/145544>
[INFO] [stdout]   = note: `#[warn(varargs_without_pattern)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: name the argument, or use `_` to continue ignoring it
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn do_something(&mut self, _: ...){
[INFO] [stdout]   |                                ++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0261, E0425, E0586, E0658.
[INFO] [stdout] For more information about an error, try `rustc --explain E0261`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 19)
[INFO] [stdout]     src/lib.rs - (line 3)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "63254e82b61ef1a452eaba5467677b1758f0e6cc68fc37eb255262f72b288636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63254e82b61ef1a452eaba5467677b1758f0e6cc68fc37eb255262f72b288636", kill_on_drop: false }`
[INFO] [stdout] 63254e82b61ef1a452eaba5467677b1758f0e6cc68fc37eb255262f72b288636
