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fixed BUG-48088: OOM compressing JS with certain regexp

Augusto Mauch requested to merge openbravo/devel/openbravo:fix/48088-js-regexp into release/21Q3

When trying to compress a JS containing a matching for a single character which includes the / character followed by the character an OOM was produced. Ie. /[/]/

This was caused by incorrectly detecting the / chracter inside the single character matching group as regexp termination instead of as / single character.

Note that other cases including other matching other quotes agfter / character would have thrown an UnterminatedStringLiteralException.

This is fixed by taking into account when a regexp is inside a single character match not to consider / as regexp termination.

Edited by Augusto Mauch

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