Some generic error regexps match

[antifuchs]

When running tests that log with a custom format, I see that go-test-mode wrongly buttonizes random lines that contain references to file names. Here's an example log line that gets fontified:

[54546|github.com/antifuch/something/storage.TestSomething 86295abcfd4c1629>3f25b6acce436923]   [err_kyyLxFeB6zZN0Nra]  /Users/asf/Hacks/go/src/github.com/antifuchs/something/controller.go:106: [trace] Couldn't perform action

I'd like to define a regexp matching the references contained in these errors, but the following doesn't cause a button to be created:

(add-to-list 'compilation-error-regexp-alist-alist
               '(go-test-my-log-format "\[err_[[:alnum:]]+\]  \\(/.+\\.go\\):\\([0-9]+\\): .*" 1 2))
  (add-to-list 'go-test-compilation-error-regexp-alist 'go-test-my-log-format)

This error doesn't match any of the regexes on go-test-compilation-error-regexp-alist-alist (but matches some referenced by the default compilation-error-regexp-alist). As a workaround, I've started doing this:

(add-to-list 'go-test-mode-hook
               (defun asf--go-test-mode-setup-hook ()
                 (add-to-list (make-local-variable 'compilation-error-regexp-alist) 'go-test-my-log-format)))

...and this aligns regexes to correctly buttonize this output; This leads me to suspect gotest picks up the default error regexps from compilation-error-regexp-alist. Is this workaround what I should be doing?