Bug report

Sscanf generates a 2-item array, but Phpstan claims that index 1 of the result does not exist.

Code snippet that reproduces the problem

[]
(https://phpstan.org/r/2658a927-8733-4d61-8f84-7072c4c3d2c9)

Expected output

Scan should be clean. Phpstan reports "Offset 1 does not exist on array{string}."

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