# gem install pg -v '0.15.1'
Building native extensions.  This could take a while...
Successfully installed pg-0.15.1
invalid options: -f fivefish
(invalid options are ignored)
Parsing documentation for pg-0.15.1
Before reporting this, could you check that the file you're documenting
has proper syntax:

  /usr/bin/ruby18 -c ext/pg.c

RDoc is not a full Ruby parser and will fail when fed invalid ruby programs.

The internal error was:

	(RegexpError) Stack overflow in regexp matcher: /.*((?>\/\*.*?\*\/\s+))
                         ([\w\.\s]+\s* = \s+)?rb_define_(class|module).*?"(PG)"/mx

ERROR:  While executing gem ... (RegexpError)
    Stack overflow in regexp matcher: /.*((?>\/\*.*?\*\/\s+))
                         ([\w\.\s]+\s* = \s+)?rb_define_(class|module).*?"(PG)"/mx