On Mon, 26 May 2008 14:27:55 -0000
Lele Gaifax <bugs@darcs.net> wrote:

> Doing a "darcs query authors" when darcs decides it needs to spawn a
> pager and the reenters, you get it hung forever, eating all CPU
> time. A "kill -9" is needed.
> 
> This is with 2.0.0 (2.0.0 (+ 268 patches)), with ghc 6.8.3: I'm quite
> sure it worked ok till, say, +230.

Ok, I can reliably track the culprit to the patch

Thu May 22 18:06:17 CEST 2008  David Roundy <droundy@darcs.net>
  * bump optimization level up to -O2.
  I'm not quite sure why we ever dropped it down... presumably someone was
  impatient with compile times.

A double "make clean; make", with and without that specific patch,
shows that using -O2 causes (at least) that strange problem. So maybe
it was not just impatience...

hth,
ciao, lele.
-- 
nickname: Lele Gaifax    | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas    | comincerò ad aver paura di chi mi copia.
lele@nautilus.homeip.net |                 -- Fortunato Depero, 1929.