Incompletely prefer opaque type bounds when self type bottoms out in infer

[compiler-errors]

r? lcnr

[rust-log-analyzer]

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

Click to see the possible cause of the failure (guessed by this bot)

info: removing rustup binaries
info: rustup is uninstalled
##[group]Image checksum input
mingw-check-tidy
# We use the ghcr base image because ghcr doesn't have a rate limit
# and the mingw-check-tidy job doesn't cache docker images in CI.
FROM ghcr.io/rust-lang/ubuntu:22.04

ARG DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y --no-install-recommends \
  g++ \
---

COPY host-x86_64/mingw-check/validate-toolstate.sh /scripts/
COPY host-x86_64/mingw-check/validate-error-codes.sh /scripts/

# NOTE: intentionally uses python2 for x.py so we can test it still works.
# validate-toolstate only runs in our CI, so it's ok for it to only support python3.
ENV SCRIPT TIDY_PRINT_DIFF=1 python2.7 ../x.py test \
           --stage 0 src/tools/tidy tidyselftest --extra-checks=py,cpp
#
# This file is autogenerated by pip-compile with Python 3.10
# by the following command:
#
#    pip-compile --allow-unsafe --generate-hashes reuse-requirements.in
---
#12 2.774 Building wheels for collected packages: reuse
#12 2.776   Building wheel for reuse (pyproject.toml): started
#12 2.992   Building wheel for reuse (pyproject.toml): finished with status 'done'
#12 2.993   Created wheel for reuse: filename=reuse-4.0.3-cp310-cp310-manylinux_2_35_x86_64.whl size=132719 sha256=5bb60f62728aaedff7162745ce743c7f2f55069b3e7f82e6a37d70df455797cc
#12 2.993   Stored in directory: /tmp/pip-ephem-wheel-cache-jbbtnsb9/wheels/3d/8d/0a/e0fc6aba4494b28a967ab5eaf951c121d9c677958714e34532
#12 2.995 Successfully built reuse
#12 2.995 Installing collected packages: boolean-py, binaryornot, tomlkit, reuse, python-debian, markupsafe, license-expression, jinja2, chardet, attrs
#12 3.394 Successfully installed attrs-23.2.0 binaryornot-0.4.4 boolean-py-4.0 chardet-5.2.0 jinja2-3.1.4 license-expression-30.3.0 markupsafe-2.1.5 python-debian-0.1.49 reuse-4.0.3 tomlkit-0.13.0
#12 3.395 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
#12 3.928 Collecting virtualenv
#12 4.031   Downloading virtualenv-20.30.0-py3-none-any.whl (4.3 MB)
#12 4.182      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 4.3/4.3 MB 29.0 MB/s eta 0:00:00
#12 4.248 Collecting filelock<4,>=3.12.2
#12 4.270   Downloading filelock-3.18.0-py3-none-any.whl (16 kB)
#12 4.305 Collecting platformdirs<5,>=3.9.1
#12 4.328   Downloading platformdirs-4.3.7-py3-none-any.whl (18 kB)
#12 4.347 Collecting distlib<1,>=0.3.7
#12 4.370   Downloading distlib-0.3.9-py2.py3-none-any.whl (468 kB)
#12 4.379      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 469.0/469.0 KB 67.0 MB/s eta 0:00:00
#12 4.462 Installing collected packages: distlib, platformdirs, filelock, virtualenv
#12 4.646 Successfully installed distlib-0.3.9 filelock-3.18.0 platformdirs-4.3.7 virtualenv-20.30.0
#12 4.647 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
#12 DONE 4.7s

#13 [7/8] COPY host-x86_64/mingw-check/validate-toolstate.sh /scripts/
#13 DONE 0.0s
---
DirectMap4k:      122816 kB
DirectMap2M:     6168576 kB
DirectMap1G:    12582912 kB
##[endgroup]
Executing TIDY_PRINT_DIFF=1 python2.7 ../x.py test            --stage 0 src/tools/tidy tidyselftest --extra-checks=py,cpp
+ TIDY_PRINT_DIFF=1 python2.7 ../x.py test --stage 0 src/tools/tidy tidyselftest --extra-checks=py,cpp
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.05s
##[endgroup]
WARN: currently no CI rustc builds have rustc debug assertions enabled. Please either set `rust.debug-assertions` to `false` if you want to use download CI rustc or set `rust.download-rustc` to `false`.
[TIMING] core::build_steps::tool::LibcxxVersionTool { target: x86_64-unknown-linux-gnu } -- 0.218
---
fmt check
fmt: checked 6000 files
tidy check
tidy: Skipping binary file check, read-only filesystem
##[error]tidy error: /checkout/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs:844: 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
##[error]tidy error: /checkout/compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs:875: 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
removing old virtual environment
creating virtual environment at '/checkout/obj/build/venv' using 'python3.10' and 'venv'
creating virtual environment at '/checkout/obj/build/venv' using 'python3.10' and 'virtualenv'
Requirement already satisfied: pip in ./build/venv/lib/python3.10/site-packages (25.0.1)
Collecting pip
  Downloading pip-25.1-py3-none-any.whl.metadata (3.6 kB)
Downloading pip-25.1-py3-none-any.whl (1.8 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.8/1.8 MB 105.8 MB/s eta 0:00:00
Installing collected packages: pip
---
All checks passed!
checking python file formatting
26 files already formatted
checking C++ file formatting
some tidy checks failed
Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:01:54
  local time: Mon Apr 28 18:39:56 UTC 2025
  network time: Mon, 28 Apr 2025 18:39:56 GMT
##[error]Process completed with exit code 1.
Post job cleanup.

[compiler-errors]

Suggested change

	pub(crate) fn find_sup_as_registered_opaque(&self, self_ty: I::Ty) -> Option<ty::AliasTy<I>> {
	pub(crate) fn find_sup_as_registered_opaque(&self, self_ty: ty::TyVid) -> Option<ty::AliasTy<I>> {