[WIP] Polymorphization

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The job test-tidy failed! Check out the build log: (web) (plain enhanced) (plain)

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fmt: checked 7313 files
tidy check
tidy [rustdoc_json (src)]: `rustdoc-json-types` modified, checking format version
tidy: Skipping binary file check, read-only filesystem
tidy [style (compiler)]: /checkout/compiler/rustc_codegen_ssa/src/mir/mod.rs:217: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this is a hacky temporary thing, remove or make proper
tidy [style (compiler)]: /checkout/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs:452: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: should we include the layout as well?
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/instance.rs:997: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this and/or is_ty_param_polymorphizable should probably be queries,
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/instance.rs:1010: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: is there any way this is visible from generic user code that doesn't use intrinsics?
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/instance.rs:1016: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this is horrifically hacky, need better solution. probably lang items,
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/instance.rs:1111: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: maybe disqualify T: 'static since that's needed for TypeId on stable?
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/layout.rs:1028: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: probably need to support this
tidy [style (compiler)]: /checkout/compiler/rustc_middle/src/ty/util.rs:1565: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this should be changed once Erased types can have drop impls
tidy [style (compiler)]: /checkout/compiler/rustc_codegen_llvm/src/type_of.rs:105: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this used to special-case on ty.is_erased(). now it doesn't do that (good!)
tidy [style (compiler)]: /checkout/compiler/rustc_trait_selection/src/traits/select/mod.rs:2140: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this is a bit sketchy since we checked sizedness of the layout before creating ty::Erased
tidy [style (compiler)]: /checkout/compiler/rustc_public/src/unstable/convert/stable/ty.rs:498: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: should add new rustc_public::TyKind variant probably
tidy [style (compiler)]: /checkout/compiler/rustc_public/src/unstable/convert/stable/ty.rs:499: the `todo!` macro is used for tasks that should be done before merging a PR.
If you want to panic here, use `panic!`, `unimplemented!`, `unreachable!`, `rustc_middle::bug!` or an assertion
tidy [style (compiler)]: /checkout/compiler/rustc_monomorphize/src/collector.rs:1100: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: polymorphize should not be ad hoc like this
tidy [style (compiler)]: /checkout/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs:739: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
tidy [style (compiler)]: /checkout/compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/encode.rs:740: the `todo!` macro is used for tasks that should be done before merging a PR.
If you want to panic here, use `panic!`, `unimplemented!`, `unreachable!`, `rustc_middle::bug!` or an assertion
tidy [style (compiler)]: /checkout/compiler/rustc_symbol_mangling/src/v0.rs:332: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this hashing is a really hacky temporary approach
tidy [style (compiler)]: /checkout/compiler/rustc_symbol_mangling/src/v0.rs:551: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: this needs more thought and design work
tidy [style (compiler)]: /checkout/compiler/rustc_symbol_mangling/src/lib.rs:147: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: not the right place for this probably
tidy [style (compiler)]: /checkout/compiler/rustc_symbol_mangling/src/lib.rs:367: TODO is used for tasks that should be done before merging a PR;
If you want to leave a message in the codebase use FIXME
 >> TODO: handle erased params in demangling somehow
tidy [style (compiler)]: FAIL
removing old virtual environment
creating virtual environment at '/checkout/obj/build/venv' using 'python3.12' and 'venv'
Requirement already satisfied: pip in ./build/venv/lib/python3.12/site-packages (24.0)
Collecting pip
  Downloading pip-26.2.1-py3-none-any.whl.metadata (4.6 kB)
---
typechecking javascript files
tidy: The following check failed: style (compiler)
Bootstrap failed while executing `test src/tools/tidy tidyselftest --extra-checks=py,cpp,js,spellcheck`
Currently active steps:
test::Tidy {  } at src/bootstrap/src/core/build_steps/test.rs:1665
Command `/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools-bin/rust-tidy --root-path=/checkout --cargo-path=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo --output-dir=/checkout/obj/build --concurrency=4 --npm-path=/node/bin/yarn --ci=true --extra-checks=py,cpp,js,spellcheck` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/tool.rs:1627:23
Executed at: src/bootstrap/src/core/build_steps/test.rs:1747:29

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:02:43
  local time: Mon Sep 28 20:01:17 UTC 2026
  network time: Mon, 28 Sep 2026 20:01:17 GMT
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"