Race condition?

[Simon Peyton-Jones]

In my latest validate run (from clean), I got many occurrences of this warning:

+WARNING: cache is out of date: /64playpen/simonpj/builds/HEAD-2/bindisttest/install dir/lib/ghc-7.3/package.conf.d/package.cache
+  use 'ghc-pkg recache' to fix.
 mod146.hs:2:30:
     Conflicting exports for `m1':
*** unexpected failure for mod146(normal)


I consulted Simon M. Our best guess is that it's caused by a race condition: two tests both of which modify the package database, screwing it up.

We have no idea of what in particular is the problem, though.

It looks as if a re-run is going fine.

Simon
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