Anyone using flymake-display-err-menu-for-current-line?

[João Távora]

Hi,

As part of my flymake rewrite, I'm trying to discover if anyone is
still using flymake-display-err-menu-for-current-line. It seems to be
broken for a very long time. The manual states:

  If there’s at least one error or warning reported for the current
  line, this function will display a popup menu with error/warning
  texts.  Selecting the menu item whose error belongs to another file
  brings forward that file with the help of the
  ‘flymake-goto-file-and-line’ function.

IOW, in C, it could be useful to navigate to errors marked on A.c but
hailing from included file/buffer B.h. 

This possibly worked in the past but seems to be broken at least on a
recent GCC, since the flymake parser can't scrape its output. It would
be great to remove and implement more generically.

Thanks,
João