bug#7069: Compilation from within emacs becomes slower and slower until Emacs is restarted

[Lars Hamren]

Hi,

I have found the cause of this problem.

It goes away if I remove this code from my .emacs:

        (add-hook 'compilation-mode-hook
          (lambda () (setq compilation-error-regexp-alist
              (cons
               ;; Quartus II error messages
               '(".*Verilog .* at \\(.+\\)(\\([0-9]+\\)): .*" 1 2)
              compilation-error-regexp-alist))))

I haven't looked further into why this should be a problem. The regexp
is quite simple, and doesn't match when compiling with g++.

Kind regards
/Lars
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