[release/8.0-staging] Fix HashSet copy constructor handling of instances that have fallen back to the randomized hashcode generator. (#107613) #107687
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…ack to the randomized hashcode generator. (dotnet#107613)
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Backport of #107613 to release/8.0-staging
/cc @eiriktsarpalis
Customer Impact
Fixes a customer reported issue where passing a
HashSet<string>that has fallen back to randomized string comparison will result in a corrupted set being created.Regression
Likely introduced in .NET 5 via #37180 which brought in non-randomized string comparison.
Testing
Added unit testing validating that the copy constructor works as expected.
Risk
Moderate. While this is a targeted fix,
HashSet<T>is a very common core type so any change carries an elevated degree of risk.