Fix crash in maxIntersections

[Algunenano]

Changelog category (leave one):

• Critical Bug Fix (crash, LOGICAL_ERROR, data loss, RBAC)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

• Fix crash in maxIntersections

Documentation entry for user-facing changes

Closes #65612.
AFAICT, this was introduced when allocatesMemoryInArena was first introduced, which is in versions 1.X.

[robot-ch-test-poll]

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