regexprep with 'emptymatch' option

[c.]

Building the default branch on OSX I get a test failure in regexprep.
The failing test is the following:

regexprep ('World!', '^', 'Hello ', 'emptymatch')

should return  'Hello world!' but I get 'Hello orld!' instead.
I am linking against a self-built pcre version 8.30.
Is anyone else experiencing this problem? 
Does anyone have suggestions how to fix it?

c.