# Coherence Issue 57893

This hackmd is tracking regressions from [PR #66037], which is a proposed fix for [#57893]. For each affected crate, we are scraping the logs to extract the "overlapping impl". In some cases, the impl comes from an upstream crate, but in other cases it's local.

One question: This unsoundness ultimately relies on associated types. I wonder if there is some room to be...clever here in the absence of associated types? Virtually all affected traits have no associated types, if not all.

[#57893]: https://github.com/rust-lang/rust/issues/57893
[PR #66037]: https://github.com/rust-lang/rust/pull/66037

#### Regressions starting with `A`
- [axiom-0.1.0](https://crates.io/crates/axiom/0.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/axiom-0.1.0/log.txt)
- pattern: Bridge, not actually applicable
- `impl<T: ?Sized + Any + Serialize ..> ActorMessage for T` [link](https://docs.rs/axiom/0.2.0/src/axiom/message.rs.html#42-55)

#### Regressions starting with `B`
- [biscuit-0.1.0](https://github.com/avranju/import-amusic-playlist/tree/cdba20d673bdfa628952ad842bf14e9b2c7a1e5d): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/avranju.import-amusic-playlist/log.txt)
- [biscuit-0.1.1](https://github.com/fiji-flo/dino-park-fossil/tree/4fa70e557e380edc1e6fb660a46a61cb389b042f): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/fiji-flo.dino-park-fossil/log.txt)
- [biscuit-0.2.0](https://github.com/fiji-flo/dino-park-fence/tree/1c6f126df28d5f156bacdd35133f5bf4c14d3258): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/fiji-flo.dino-park-fence/log.txt)
- the trait `serde_custom::flatten::ToJson` cannot be made into an object ([source](https://github.com/lawliet89/biscuit/blob/e4688c0fd0b851bd18f17aa6abc4429b8ccd81c8/src/serde_custom/flatten.rs#L148-L155))
- pattern: Bridge, not actually applicable
- `impl<T: ?Sized> ToJson for T where T: Serialize` ([source](https://github.com/lawliet89/biscuit/blob/e4688c0fd0b851bd18f17aa6abc4429b8ccd81c8/src/serde_custom/flatten.rs#L157-L164))

#### Regressions starting with `C`
- [clone-into-box-0.1.0](https://crates.io/crates/clone-into-box/0.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/clone-into-box-0.1.0/log.txt)
- pattern: Bridge, not actually applicable, would be ok
- `impl<T: ?Sized> FnClone for T where T: Fn() -> String + CloneIntoBox {}`

#### Regressions starting with `D`
- [dicom-parser-0.1.0](https://crates.io/crates/dcmdump/0.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/dcmdump-0.1.0/log.txt)
- the trait `util::ReadSeek` cannot be made into an object
- `pub trait ReadSeek: Read + Seek {}`
- `impl<T: ?Sized> ReadSeek for T where T: Read + Seek {}`
- interesting special case -- no methods, no default required? Have to ponder this one!
- pattern: Alias
- [downcast-0.10.0](https://github.com/azah/danmuji/tree/b12ce05b711ee440be2cd9db56dd9ecf4c4fe23b): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/azah.danmuji/log.txt)
- this appears to be roughly the same as `Any` in stdlib?
- `impl<T: ?Sized> Any for T where T: StdAny`
- pattern: Implicit specialization

#### Regressions starting with `E`
- [erased-serde-0.1.3](https://crates.io/crates/lsp_rs/0.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/lsp_rs-0.1.0/log.txt)
- [erased-serde-0.3.3](https://github.com/jesskfullwood/hyper-proxy-bug/tree/9b0afd0023b69c8fd1635da0a99513a8ac586d2e): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/jesskfullwood.hyper-proxy-bug/log.txt)
- [erased-serde-0.3.9](https://github.com/HackerSpaceMaringa/camera_bot/tree/d1a5ad92b0878eefabbdcb5c07fed7cc9a686f2a): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/HackerSpaceMaringa.camera_bot/log.txt)
- the trait `ser::Serialize` cannot be made into an object
- `impl<T: ?Sized> Serialize for T
where T: serde::Serialize,` ([source](https://docs.rs/erased-serde/0.3.9/src/erased_serde/ser.rs.html#251))
- in this particular case, `serde::Serialize` is not object safe, but it feels like we can't rely on that; what if we broadened the set of object safe traits in the future?
- pattern: Bridge, not actually applicable
- [euphrates-0.1.0](https://crates.io/crates/euphrates_cli/0.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/euphrates_cli-0.1.0/log.txt)
- the trait `systems::sms::inbox::InboxGetDebugger` cannot be made into an object ([source](https://github.com/mikebenfield/euphrates/blob/41b55675b575e8741ddaf2a0f31d9c23171b59aa/euphrates/src/systems/sms/inbox.rs#L303))
- `impl<T> InboxGetDebugger for T where T: ?Sized + Z80Inbox + GetDebugger, {}` ([source](https://github.com/mikebenfield/euphrates/blob/41b55675b575e8741ddaf2a0f31d9c23171b59aa/euphrates/src/systems/sms/inbox.rs#L305-L310))
- pattern: Alias
- the trait `hardware::sms_vdp::vdp_interface::SmsVdpInterface` cannot be made into an object ([source](https://github.com/mikebenfield/euphrates/blob/41b55675b575e8741ddaf2a0f31d9c23171b59aa/euphrates/src/hardware/sms_vdp/vdp_interface.rs#L4-L65))
- `impl<T: ?Sized> SmsVdpInterface for T where T: SmsVdpInternal` ([source](https://github.com/mikebenfield/euphrates/blob/41b55675b575e8741ddaf2a0f31d9c23171b59aa/euphrates/src/hardware/sms_vdp/vdp_interface.rs#L67))
- pattern: Bridge

#### Regressions starting with `G`
- [galvanic-assert-0.8.7](https://github.com/phra/rustbuster/tree/18cd96e7d0d285f2d05217939b1a55b7a5eef683): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/phra.rustbuster/log.txt)
- the trait `Matcher` cannot be made into an object ([source](https://github.com/mindsbackyard/galvanic-assert/blob/33855f4a2ef829ddd5652e7edbbf0249dddf77b6/src/lib.rs#L265-L270))
- `impl<'a, T:'a, F> Matcher<'a,T> for F
where F: Fn(&'a T) -> MatchResult + ?Sized` ([source](https://github.com/mindsbackyard/galvanic-assert/blob/33855f4a2ef829ddd5652e7edbbf0249dddf77b6/src/lib.rs#L275-L280))
- pattern: Bridge
- [glib#1b9ff5a](https://github.com/Finnerale/such-tag/tree/8eb9e18c42a134cd6d7003547356bcbc96817b7e): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Finnerale.such-tag/log.txt)
- [glib#451bc8d](https://github.com/BORN2LOSE/ahagon/tree/3fa5f47359c1709adf32945ce69e3884e869c5de): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/BORN2LOSE.ahagon/log.txt)
- [glib#5613e42](https://github.com/tomasdivito/gol-rs/tree/333059f0f872b905447d01342771554735a76737): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/tomasdivito.gol-rs/log.txt)
- [glib#6aac095](https://github.com/i3am/gba-sim/tree/9d1f64650335dc700ddf1eb2d3ef080c45f28e54): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/i3am.gba-sim/log.txt)
- [glib#9bda2d9](https://github.com/synixebrett/Rotae/tree/043ffc917fdc39f03a8ad951f62038a75bb533fc): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/synixebrett.Rotae/log.txt)
- [glib#a3d0ab7](https://github.com/Ham5andw1ch/GTKonfig/tree/ff7554fc9fe4f3215180cd67f9c9152fdc512e90): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Ham5andw1ch.GTKonfig/log.txt)
- [glib#a5e1d02](https://github.com/FreeFull/monotile/tree/406f15b1b25861f208e8c24159fb728bc938a654): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/FreeFull.monotile/log.txt)
- [glib#a78f961](https://github.com/creekpld/hello-gtk/tree/20497d47ac399fdb224aab39c9d4d75ffa9981b6): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/creekpld.hello-gtk/log.txt)
- [glib#dc30496](https://github.com/guni973/rust_gtk/tree/2664de637e030d676c9b7cbfd0119cc4dbf364c5): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/guni973.rust_gtk/log.txt)
- [glib#f703382](https://github.com/vamsikrishna-brahmajosyula/git-gtk-rs/tree/197f5e60d1277a9c9b10a6c34f02c51779699a83): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/vamsikrishna-brahmajosyula.git-gtk-rs/log.txt)
- [glib-0.3.0](https://github.com/jjwest/gameoflife/tree/b8c08d80c800f3c179f0ff9d2233b93deea12b8b): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/jjwest.gameoflife/log.txt)
- [glib-0.3.1](https://github.com/Aijifoster3/rust_ui_test/tree/b2efa979c5251fb8f1376abbb28b660615bdfa81): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Aijifoster3.rust_ui_test/log.txt)
- [glib-0.4.0](https://github.com/AQRPM/AQRPM/tree/9986c2d2fd6a94c07fc85693609f55ae6064d46e): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/AQRPM.AQRPM/log.txt)
- [glib-0.4.1](https://github.com/887/gtk-rs-experiments/tree/5290cdb22b35d92767aebf8fa538906b79cd0da3): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/887.gtk-rs-experiments/log.txt)
- [glib-0.5.0](https://github.com/887/fluffy-system/tree/eae7e8252bfa50a621723debc9bc27030a8eaee3): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/887.fluffy-system/log.txt)
- [glib-0.6.0](https://github.com/AndyLnd/rust-gol/tree/cf75ae9c2fdbcd875dfd9ee6106daecd44868118): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/AndyLnd.rust-gol/log.txt)
- [glib-0.6.1](https://github.com/BaptisteGelez/funkload/tree/1951818e1f8aecb581b9c1c87a8c3b08947d29c4): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/BaptisteGelez.funkload/log.txt)
- [glib-0.7.0](https://github.com/FreeFull/sway-modeset-gui/tree/acad6c787172b182f01f018664c402384814dedc): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/FreeFull.sway-modeset-gui/log.txt)
- [glib-0.7.1](https://github.com/AndrewRadev/rust-quickmd/tree/e6925c830f868355180440ce23d2926936d0e21b): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/AndrewRadev.rust-quickmd/log.txt)
- [glib-0.8.0](https://github.com/GuillaumeGomez/process-viewer/tree/2a9b586629c0cc6b4da4f1fa1b38e40a982e9ad7): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/GuillaumeGomez.process-viewer/log.txt)
- [glib-0.8.1](https://github.com/AZanellato/gtk_demo/tree/115882f72464ebabe32cad5c092aa711933dc514): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/AZanellato.gtk_demo/log.txt)
- [glib-0.8.2](https://github.com/BrandonDyer64/Rustron/tree/9cedfd7435da50b4ef00d4bc9a1ad516a836df18): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/BrandonDyer64.Rustron/log.txt)
- the trait `value::ToValue` cannot be made into an object ([source](https://github.com/gtk-rs/glib/blob/84a4bfde0299e3d02c42faff6d2d433c70b68846/src/value.rs#L650-L658))
- `impl<T: ?Sized + SetValue> ToValue for T` ([source](https://github.com/gtk-rs/glib/blob/84a4bfde0299e3d02c42faff6d2d433c70b68846/src/value.rs#L675-L688))
- pattern: Bridge
- interesting case:
-`T = dyn ToValue` is not a problem, as `dyn ToValue: SetValue` does not apply
- but of course we should look forward to `T = (dyn ToValue + SetValue)`
- but in that case, invoking the methods from this impl would actually work fine -- the key point being that this is not an impl of `SetValue`, so `SetValue::set_value` would still dynamically dispatch
- [gluon_check-0.13.0](https://crates.io/crates/gluon_check/0.13.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/gluon_check-0.13.0/log.txt)
- the trait `base::types::Walker` cannot be made into an object ([source](https://github.com/gluon-lang/gluon/blob/cd03fd254de79d6a82464b181c35dc75c3a51198/base/src/types/mod.rs#L2871-L2873))
- `impl<'a, F: ?Sized> Walker<'a, ArcKind> for F
where
F: FnMut(&ArcKind)` ([source](https://github.com/gluon-lang/gluon/blob/cd03fd254de79d6a82464b181c35dc75c3a51198/base/src/kind.rs#L200-L208))
- `impl<'a, I, T, F> Walker<'a, T> for F
where
F: ?Sized + FnMut(&'a T),
T: Deref<Target = Type<I, T>> + 'a,
I: 'a` ([source](https://github.com/gluon-lang/gluon/blob/cd03fd254de79d6a82464b181c35dc75c3a51198/base/src/types/mod.rs#L3769-L3779))
- these impls also seem to have that character of "invoking them is ok"
- pattern: Bridge

#### Regressions starting with `L`
- [lang_extension-1.0.0](https://crates.io/crates/lang_extension/1.0.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/lang_extension-1.0.0/log.txt)
- [lang_extension-1.0.1](https://crates.io/crates/scf-core/1.1.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/scf-core-1.1.0/log.txt)
- the trait `any::value::Value` cannot be made into an object ([source](https://github.com/mydotey/lang-extension/blob/master/rust/src/any/value.rs#L10))
- `impl<T: ?Sized + ValueConstraint> Value for T` ([source](https://github.com/mydotey/lang-extension/blob/master/rust/src/any/value.rs#L19-L29))
- pattern: Implicit specialization, not actualy applicable, internally relies on `Any`
- i.e., if invoked for `dyn Any`, the downcast would fail
- the trait `any::key::Key` cannot be made into an object ([source](https://github.com/mydotey/lang-extension/blob/master/rust/src/any/key.rs#L10-L17))
- `impl<T: ?Sized + KeyConstraint> Key for T` ([source](https://github.com/mydotey/lang-extension/blob/master/rust/src/any/key.rs#L19-L28))
- as above, I don't know if there's a problem here -- if we just used this impl for `dyn Key + KeyConstraint`, it'd be ok
- perhaps the key determinant is whether `dyn Key` (on its own) meets the impl requirements?
- pattern: Bridge, not actually applicable

#### Regressions starting with `M`
- [mockiato-0.9.5](https://github.com/myelin-ai/engine/tree/0457e868357cef6916418e9674807b6988414444): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/myelin-ai.engine/log.txt)
- the trait `fmt::debug::MaybeDebug` cannot be made into an object ([source](https://github.com/mockiato/mockiato/blob/edaabac74c44951ffc73cac673f8da5578af2115/src/fmt/debug.rs#L14-L18))
- this `impl<T> MaybeDebug for T
where
T: ?Sized` has `default` ([source](https://github.com/mockiato/mockiato/blob/edaabac74c44951ffc73cac673f8da5578af2115/src/fmt/debug.rs#L23-L31))
- this would probably "just work" with the intended design
- pattern: Implicit specialization, but has default
- and not `impl<T> MaybeDebug for T
where
T: fmt::Debug + ?Sized` ([source](https://github.com/mockiato/mockiato/blob/edaabac74c44951ffc73cac673f8da5578af2115/src/fmt/debug.rs#L33-L41))
- this would cause errors, but falls (I think) into that other category of "conversion impls" that I hope we can make work
- pattern: Bridge, not actually applicable
- [msiz_rustc-ap-rustc_errors-3.0.0](https://crates.io/crates/msiz_rustc-ap-rustc_errors/3.0.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/msiz_rustc-ap-rustc_errors-3.0.0/log.txt)
- `msiz_rustc_ap_rustc_data_structures::sync::Send` cannot be made into an object ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L31))
- `impl<T: ?Sized> Send for T {}` ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L34))
- pattern: alias (well, sort of)
- the trait `msiz_rustc_ap_rustc_data_structures::sync::Sync` cannot be made into an object ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L32))
- `impl<T: ?Sized> Sync for T {}` ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L35))
- pattern: alias (well, sort of)

#### Regressions starting with `R`
- [referent-0.1.1](https://crates.io/crates/referent/0.1.1): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/referent-0.1.1/log.txt)
- the trait `Foo` cannot be made into an object
- `impl<T: ?Sized> Foo for T {}`
- [rhai#daadb4c](https://github.com/viraja1/rhai_functions_fluence/tree/e81fb9acd77025892cde2d3aa4f8496c01d63143): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/viraja1.rhai_functions_fluence/log.txt)
- [rhai-0.9.1](https://github.com/storily/garrire/tree/4d4e3f9f5c5949f3fd986fe86064485ebba50822): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/storily.garrire/log.txt)
- the trait `any::Any` cannot be made into an object ([source](https://github.com/jonathandturner/rhai/blob/master/src/any.rs#L4-L14))
- `impl<T> Any for T
where
T: Clone + StdAny + ?Sized` ([source](https://github.com/jonathandturner/rhai/blob/master/src/any.rs#L16-L37))
- [rustc-ap-rustc_errors-610.0.0](https://crates.io/crates/rustfmt-nightly/1.4.10): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/rustfmt-nightly-1.4.10/log.txt)
- the trait `rustc_ap_rustc_data_structures::sync::Send` cannot be made into an object ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L31))
- `impl<T: ?Sized> Send for T {}` ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L34))
- pattern: dummy
- the trait `rustc_ap_rustc_data_structures::sync::Sync` cannot be made into an object ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L32))
- `impl<T: ?Sized> Sync for T {}` ([source](https://github.com/rust-lang/rust/blob/master/src/librustc_data_structures/sync.rs#L35))
- pattern: dummy

#### Regressions starting with `S`
- [serenity#1c9ce11](https://github.com/Lichthagel/Distrakt/tree/f8ae1bd1f6d91f8d711eb0b031c8c7f7d9f516b8): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Lichthagel.Distrakt/log.txt)
- [serenity-0.5.10](https://github.com/remexre/janus/tree/b8dc53c247dece257be7e5a27ab103b45a5ca9c2): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/remexre.janus/log.txt)
- [serenity-0.5.11](https://github.com/TheBotCrator/Life/tree/15e905db7764bc721f420bf9a689e443e4607dc4): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/TheBotCrator.Life/log.txt)
- [serenity-0.5.12](https://github.com/VictorKoenders/irc_discord_client/tree/97a5a12a11f8e5368b0ecd6d6251cf8e574af627): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/VictorKoenders.irc_discord_client/log.txt)
- [serenity-0.5.13](https://github.com/Jaredana/rustbotcopy/tree/755859d8db85e5f0aed390f653c944aa6a8839c5): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Jaredana.rustbotcopy/log.txt)
- the trait `framework::standard::command::Command` cannot be made into an object ([source](https://github.com/serenity-rs/serenity/blob/d9998e1ed09b125229703b8ec2dbbf381260db01/src/framework/standard/command.rs#L280-L295))
- `impl<F> Command for F where F: Fn(&mut Context, &Message, Args) -> Result<(), Error> + Send + Sync + ?Sized + 'static` ? ([source](https://github.com/serenity-rs/serenity/blob/d9998e1ed09b125229703b8ec2dbbf381260db01/src/framework/standard/command.rs#L319-L327))
- pattern: Bridge
- [slog-0.7.0](https://crates.io/crates/slacs-core/0.0.0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/reg/slacs-core-0.0.0/log.txt)
- the trait `ser::Serializer` cannot be made into an object ([source](https://github.com/slog-rs/slog/blob/71e2252289c789571af0cf2c732f9e4a44574647/src/ser.rs#L54-L91))
- `impl<W: io::Write + ?Sized> Serializer for W` ([source](https://github.com/slog-rs/slog/blob/71e2252289c789571af0cf2c732f9e4a44574647/src/ser.rs#L184-L261))
- pattern: Bridge
- [slog-2.0.12](https://github.com/Don42/exlog/tree/b9e6b7a05d84edfc8ba4fe971b66195d8c9a7b6f): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Don42.exlog/log.txt)
- [slog-2.0.6](https://github.com/TurboCartPig/aengine/tree/980d22404a2754d99abc055c106465b1ad762cec): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/TurboCartPig.aengine/log.txt)
- [slog-2.1.1](https://github.com/0x3UH4224D/home-keeper/tree/a60854911719e9c2ef9ac7e0c6cc8c1ed70403f0): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/0x3UH4224D.home-keeper/log.txt)
- [slog-2.2.3](https://github.com/Kode-Cultur/rusty-gopher/tree/c2480e8ccf719ad56cd08b49ff7da40232b2a83f): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Kode-Cultur.rusty-gopher/log.txt)
- [slog-2.3.2](https://github.com/cairesvs/city/tree/3af6636e158de0d4152c6b92873c433c46a6cfb1): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/cairesvs.city/log.txt)
- [slog-2.3.3](https://github.com/bihealth/var-agg/tree/8b199088fe24970bcd004d5f7c1c9cd174a0e82d): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/bihealth.var-agg/log.txt)
- [slog-2.4.1](https://github.com/AndreaM16/rs-ms/tree/f5835b80be25c90b4dca3b32630d2292ab59859e): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/AndreaM16.rs-ms/log.txt)
- [slog-2.5.0](https://github.com/allenap/allenap-tftp-offload/tree/66f0b7c506fbf179dc5909e57b7700dee2619eb4): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/allenap.allenap-tftp-offload/log.txt)
- [slog-2.5.2](https://github.com/Arkanosis/microstatus/tree/c2fe6aebe5f41d5589df0a110bc5c38421206a52): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Arkanosis.microstatus/log.txt)
- many feature flag combinations defining the same trait and multiple impls
- the trait `MapErrFn` cannot be made into an object ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L1555-L1559))
- `impl<T, EI, EO> MapErrFn<EI, EO> for T where T: 'static + Sync + Send + ?Sized + UnwindSafe + RefUnwindSafe + Fn(EI) -> EO
{}` ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L1562-L1572))
- pattern: Alias
- the trait `SendSyncRefUnwindSafeKV` cannot be made into an object ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L3161))
- `impl<T> SendSyncRefUnwindSafeKV for T where T: KV + Send + Sync + RefUnwindSafe + ?Sized {}` ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L3164))
- pattern: Alias
- the trait `SendSyncRefUnwindSafeDrain` cannot be made into an object ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L1546))
- `impl<T> SendSyncRefUnwindSafeDrain for T
where
T: Drain + Send + Sync + RefUnwindSafe + ?Sized,
{
}` ([source](https://github.com/slog-rs/slog/blob/f4ada8ef4992f0ba3ff139d883319453bac8d70d/src/lib.rs#L1549-L1553))
- pattern: Alias

- [stwen77.interpreter.6f29cecd76e3d05ffac6be9e9ef6e26b78af63cc](https://github.com/stwen77/interpreter/tree/6f29cecd76e3d05ffac6be9e9ef6e26b78af63cc): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/stwen77.interpreter/log.txt)
- the trait `module::any::Any` cannot be made into an object ([source](https://github.com/stwen77/interpreter/blob/master/src/module/any.rs#L4-L12))
- `impl<T> Any for T where T: Clone + StdAny + ?Sized` ([source](https://github.com/stwen77/interpreter/blob/master/src/module/any.rs#L14-L31))
- pattern: Implicit specialization

#### Regressions starting with `T`
- [twinklebear.tray_rust.9a3ae09a7e42e9837e09012bc3318a07c3c49bd7](https://github.com/Twinklebear/tray_rust/tree/9a3ae09a7e42e9837e09012bc3318a07c3c49bd7): [log](https://crater-reports.s3.amazonaws.com/pr-66037-1/try%23c593fd608dcac7408e7fed4b8c115e906033f80e/gh/Twinklebear.tray_rust/log.txt)
- the trait `geometry::BoundableGeom` cannot be made into an object ([source](https://github.com/Twinklebear/tray_rust/blob/master/src/geometry/mod.rs#L91))
- `impl<T: ?Sized> BoundableGeom for T where T: Geometry + Boundable {}` ([source](https://github.com/Twinklebear/tray_rust/blob/master/src/geometry/mod.rs#L92))
- pattern: Alias
- the trait `geometry::SampleableGeom` cannot be made into an object ([source](https://github.com/Twinklebear/tray_rust/blob/master/src/geometry/mod.rs#L94))
- `impl<T: ?Sized> SampleableGeom for T where T: Geometry + Boundable + Sampleable {}` ([source](https://github.com/Twinklebear/tray_rust/blob/master/src/geometry/mod.rs#L95))
- pattern: Alias