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Encountering NullReferenceException when the match parameter of ImmutableArray<T>.Builder.RemoveAll is null #125921
Description
Description
When the match parameter of ImmutableArray<T>.Builder.RemoveAll is null, it throws NullReferenceException or no exception instead of ArgumentNullException.
For reference, List<T>.RemoveAll throws ArgumentNullException under the same condition.
var list = new List<int>();
list.RemoveAll(match: null); // ArgumentNullExceptionReproduction Steps
var builder = ImmutableArray.CreateBuilder<int>();
builder.RemoveAll(null); // no exceptionvar builder = ImmutableArray.CreateBuilder<int>();
builder.Add(1);
builder.RemoveAll(null); // NullReferenceExceptionExpected behavior
ArgumentNullException is thrown.
Actual behavior
- When
Count == 0: no exception. - When
Count > 0:NullReferenceExceptionis thrown.
Regression?
No response
Known Workarounds
No response
Configuration
No response
Other information
A fix has been submitted in #125920.
This fix is a potential Bucket 2 breaking change per the breaking change guidelines.
Activity
dotnet-policy-service commentedon Mar 22, 2026
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vcsjones commentedon Mar 22, 2026
This looks like it was fixed by #125920, so I am going to close this out. Please feel free to reopen if I have misunderstood.