[Dune] [#805] test failure: test-oned

Dune flyspray at dune-project.org
Mon Jun 21 13:44:49 CEST 2010


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The following task has a new comment added:

FS#805 - test failure: test-oned
User who did this - Martin Nolte (nolte)

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>From the 2.0 release notes on the website:

Severe Bugs

Dune violates strict-aliasing
You have to compile DUNE will the the option "--no-strict-aliasing". Newer versions of g++ make more use of strict aliasing rules. If you don't use the "--no-strict-aliasing" option, you will receive many warnings, and you might even observe undesired results and unreproducible errors.

But we are not alone with this problem. Several software projects intentionally violate strict-aliasing. For example, Python 2.x did so to implement reference counting ( http://mail.python.org/pipermail/python-dev/2003-July/036898.html). The Linux kernel does this because strict aliasing causes problems with optimization of inlined code ( http://lkml.org/lkml/2003/2/26/158).

For more information see Flyspray task #674
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http://www.dune-project.org/flyspray/index.php?do=details&task_id=805#comment2061

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