fix(takeLast): handle Infinity count

[yowainwright]

Description

takeLast(Infinity) currently allocates new Array(Infinity), which throws RangeError: Invalid array length.

This 1 line update assigns a growable buffer only for Infinity, while preserving the existing finite-count ring buffer and non-positive early-complete behavior.

• The regression test verifies that values are still emitted on completion.

Related issue (if exists)

• Refs fix(takeLast): prevent RangeError when count is Infinity ReactiveX/rxjs#7608

[yowainwright]

@greptile

[greptile-apps]

Greptile Summary

The PR fixes takeLast(Infinity) by selecting a growable array instead of attempting an invalid fixed-size allocation.

• Preserves the existing finite-count ring buffer and non-positive-count behavior.
• Adds a regression test confirming that all buffered values are emitted in order upon completion.

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The growable Infinity buffer works with the existing modulo and completion traversal to retain and emit all observed values in order, while finite and non-positive paths remain unchanged.

Important Files Changed

Filename	Overview
packages/rxjs/src/take-last.ts	Correctly special-cases Infinity during buffer allocation while retaining the existing indexing and completion logic.
packages/rxjs/src/take-last.spec.ts	Adds focused coverage showing that the Infinity path buffers values without errors and emits them before completion.

_{Reviews (1): Last reviewed commit: "fix(takeLast): handle Infinity count" | Re-trigger Greptile}