http://qs1969.pair.com?node_id=11124572


in reply to Re: Concatenation with empty string -- good enough to force physical copy?
in thread Concatenation with empty string -- good enough to force physical copy?

I just noticed the footnote in the OP. Sounds like you have C/XS code that modifies the string buffer which uses SvPV, SvPVbyte or SvPVutf8 instead of SvPV_force, SvPVbyte_force or SvPVutf8_force. Bad!