Failure building latest main due to R2R error when compiling System.URI method

[kg]

On windows 11 x64 with latest main, after nuking artifacts:

.\build.cmd -rc Checked -lc Release /bl

Z:\runtime\src\coreclr\jit\codegenxarch.cpp:715
Assertion failed 'operand->isUsedFromReg()' in 'System.Uri:InternalIsWellFormedOriginalString():bool:this' during 'Generate code' (IL size 831; hash 0x83c53887; FullOpts)

Z:\runtime\artifacts\bin\Crossgen2Tasks\Debug\net10.0\Microsoft.NET.CrossGen.targets(464,5): error MSB6006: "Z:\runtime\artifacts\bin\coreclr\windows.x64.Checked\x64\crossgen2\crossgen2.exe" exited with code -2147483645. [Z:\runtime\src\installer\pkg\sfx\Microsoft.NETCore.App\Microsoft.NETCore.App.Runtime.CoreCLR.sfxproj]

Still looking into this further but wanted to file it in case someone else is hitting it.

[dotnet-policy-service]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

[JulieLeeMSFT]

@mangod9, PTAL.

[kg]

PS Z:\runtime> git bisect bad
cc564efd9f29ca81b9c6909010fbf881887a0921 is the first bad commit
commit cc564efd9f29ca81b9c6909010fbf881887a0921 (HEAD)

Regressed by #117287

[kg]

@MihaZupan in case you didn't see the tag of your PR. Not sure whether we want to revert, it's unclear to me whether this will reproduce on CI. It blocks local builds in checked config, at least for me. Of course it appears to be a JIT issue so it's not really a problem with your PR per se.

[EgorBo]

I guess Miha's PR just exposed the existing bug, filed #117801 to fix it.