The gccgo runtime produces errors like this :

goroutine 18 [runnable]:
created by run_time.$init3

Error message

I am matching them like this :

;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won’t work right.
(absoft ada aix ant bash borland python-tracebacks-and-caml comma cucumber msft edg-1 edg-2 epc ftnchek iar ibm irix java jikes-file maven jikes-line gcc-inc\
lude ruby-Test::Unit gnu lcc makepp mips-1 mips-2 msft omake oracle perl php rxp sparc-pascal-file sparc-pascal-line sparc-pascal-example sun sun-ada watcom 4bsd\
gcov-file gcov-header gcov-nomark gcov-called-line gcov-never-called perl–Pod::Checker perl–Test perl–Test2 perl–Test::Harness weblint go-test
(” \\(/[a-zA-Z/0-9._]+\\):\\([0-9]+\\)” 1 2 nil 2))))
‘(diff-switches “-u”))