The find pattern is no longer experimental. The following evaluation order is now used: Since Ruby 3.2, Regexp’s matching algorithm has been greatly improved by using a memoization technique.įoo1 :: BAR1, foo2 :: BAR2 = baz1, baz2 We have introduced two improvements that significantly mitigate ReDoS. If your code attempts to match a possibly inefficient Regexp against an untrusted input, an attacker may exploit it for efficient Denial of Service (so-called Regular expression DoS, or ReDoS). It is known that Regexp matching may take unexpectedly long.
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