CI failure in DecimalTests BigIntegerAdd

[noahfalk]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=768415
Build error leg or test failing: System.Tests.DecimalTests BigIntegerAdd.Test
Pull request: #106014

Error Message

Assert.Equal() Failure: 420483735998235154.07 + -192303727189.68774567
Expected: 420483735998235154.06999999
Actual: 420483543694507964.38225433

{
  "ErrorMessage": "Assert.Equal() Failure: 420483735998235154.07 + -192303727189.68774567",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=768415
Error message validated: [Assert.Equal() Failure: 420483735998235154.07 + -192303727189.68774567]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/7/2024 9:27:05 PM UTC

Report

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-numerics
See info in area-owners.md if you want to be subscribed.

[tannergooding]

The expected here is what's incorrect. The infinitely precise answer is exactly 420483543694507964.38225433, which is what's listed as the actual result.

Probably needs more investigation

[jeffschwMSFT]

removing 'blocking-clean-ci' as it has not failed in 30 days

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

[PranavSenthilnathan]

I think #106256 fixes this (see this comment). According to the hit count, this hasn't repro'd since that fix. I'm also not able to repro this locally either.