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Fix Integer.sqrt to never exceed actual value #13076

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Apr 7, 2025
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@mame mame commented Apr 6, 2025

Integer.sqrt uses sqrt(3) from libm for small values. This method must return a value less than or equal to the actual integer square root, but libm's sqrt does not always guarantee that.

This change corrects that by decrementing the result if necessary.

Fixes [Bug #21217]

`Integer.sqrt` uses `sqrt(3)` from libm for small values.
This method must return a value less than or equal to the actual integer
square root, but libm's sqrt does not always guarantee that.

This change corrects that by decrementing the result if necessary.

Fixes [Bug #21217]
@mame mame merged commit 3a7b9ca into ruby:master Apr 7, 2025
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