rustc 1.90.0 (stable) crashes in llvm::MergedLoadStoreMotionPass on Windows

I've encountered a compiler crash (Access Violation) on the stable-x86_64-pc-windows-msvc toolchain when compiling a crate with percent-encoding="2.3.2".

Triggered by doing:

cargo new test_percent_bug
cd test_percent_bug

cargo add percent-encoding@=2.3.2

cargo build --release

This happens in many libraries, not just this one, I just chose one randomally out of the ones that failed to build.

This bug is not present in nightly-x86_64-pc-windows-msvc.

> rustup update
info: syncing channel updates for 'stable-x86_64-pc-windows-msvc'
info: syncing channel updates for 'nightly-x86_64-pc-windows-msvc'
info: checking for self-update

   stable-x86_64-pc-windows-msvc unchanged - rustc 1.90.0 (1159e78c4 2025-09-14)
  nightly-x86_64-pc-windows-msvc unchanged - rustc 1.92.0-nightly (6501e64fc 2025-10-23)

Meta

rustc --version --verbose:

rustc 1.90.0 (1159e78c4 2025-09-14)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: x86_64-pc-windows-msvc
release: 1.90.0
LLVM version: 20.1.8

Error output

error: could not compile `percent-encoding` (lib)

Caused by:
  process didn't exit successfully: `C:\Users\GalHo\.rustup\toolchains\stable-x86_64-pc-windows-msvc\bin\rustc.exe --crate-name percent_encoding --edition=2018 C:\Users\GalHo\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\percent-encoding-2.3.2\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=119 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --cfg "feature=\"alloc\"" --cfg "feature=\"default\"" --cfg "feature=\"std\"" --check-cfg cfg(docsrs,test) --check-cfg "cfg(feature, values(\"alloc\", \"default\", \"std\"))" -C metadata=16a8a5cf8d000ba1 -C extra-filename=-165dc59d939f699e --out-dir D:\Users\GalHo\Downloads\test_percent_buf\target\release\deps -C strip=debuginfo -L dependency=D:\Users\GalHo\Downloads\test_percent_buf\target\release\deps --cap-lints allow` (exit code: 0x80004005)

WinDbg Analysis (!analyze -v)

*******************************************************************************
* *
* Exception Analysis                                   *
* *
*******************************************************************************

FAILURE_BUCKET_ID:  INVALID_POINTER_WRITE_c0000005_rustc_driver-c3ae95a1becf2161.dll!llvm::MergedLoadStoreMotionPass::run

EXCEPTION_RECORD:  (.exr -1)ExceptionAddress: 00007ffc6c174ed4 (rustc_driver_c3ae95a1becf2161!llvm::MergedLoadStoreMotionPass::run+0x0000000000000564)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 0000000000000001
   Parameter[1]: ffffffffeff9f8e7
Attempt to write to address ffffffffeff9f8e7

FAULTING_THREAD:  4670

PROCESS_NAME:  rustc.exe
...

Reproduce the crash with the listed cargo new, cargo add percent-encoding@=2.3.2, and cargo build --release commands on stable-x86_64-pc-windows-msvc, then compare with nightly. Start by investigating llvm::MergedLoadStoreMotionPass::run using the supplied WinDbg failure details; done means the affected release build no longer crashes and the behavior is checked against nightly.