Please ...

$1 is a global variable which should only be carefully used in local context.

But your match within the sub changes this global variable and your alias in $_[0] reflects this.

And after leaving the sub the implicit localization restores the old value of $1...

Better stop messing with perl internals or just pass a copy of $1 or follow chorobas suggestion.

Cheers Rolf

In reply to Re: Side effect of passing matched values by reference by LanX
in thread Side effect of passing matched values by reference by puterboy

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