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DynamicFilterPhysicalExpr violates Hash/Eq contract #19641

Description

@adriangb

Describe the bug

Because Hash and Eq take out separate locks it's possible the underlying expression changes in between calls. Thus you get the same hash but not matches for equality. I think this may be problematic, it seemed to cause a spin loop with HashMap in some non commited code I have.

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  1. added theissue type on Jan 5, 2026
  2. added a commit that references this issue on Jan 8, 2026
    a55b77e
  3. added a commit that references this issue on Jan 8, 2026
    9af19c5
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