lupdate parses commented-out default values as an ID, and merges tr() calls wrongly

Dialog1::Dialog1( QWidget* parent /= 0/ )
is parsed by lupdate as being an identifier for the next tr() call, which was definitely not the intent of this code.
As a result, it merges tr() calls wrongly, and some strings get wrongly translated.
See attached testcase.

I think the tr id should be discarded upon encountering the ')'. And/or maybe C-style comments shouldn't be used for this magic, since only C++ style comments are documented as having this effect?