[release/9.0] Fix HashSet copy constructor handling of instances that have fallen back to the randomized hashcode generator. (#107613)#107685
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carlossanlop merged 1 commit intodotnet:release/9.0from Sep 16, 2024
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…ack to the randomized hashcode generator. (dotnet#107613)
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Tagging subscribers to this area: @dotnet/area-system-collections |
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@artl93 did you get a chance to look at this one? It's ask-mode so needs M2 approval. |
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Backport of #107613 to release/9.0
/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.