[Dune] [#491] PoolAllocator not 64 bit clean

[Dune]

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FS#491 - PoolAllocator not 64 bit clean
User who did this - Elias Pipping (pipping)

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$ rm fs_493_testcase_a; CXXFLAGS='-fstrict-aliasing -Wstrict-aliasing=1' make
g++ -fstrict-aliasing -Wstrict-aliasing=1 -std=c++0x -O2 -I.   fs_493_testcase_a.cc   -o fs_493_testcase_a
In file included from fs_493_testcase_a.cc:1:
../poolallocator.hh: In member function 'T* Dune::Pool<T, s>::allocate() [with T = Element, long unsigned int s = 130816ul]':
../poolallocator.hh:554:   instantiated from 'T* Dune::PoolAllocator<T, s>::allocate(size_t, const T*) [with T = Element, long unsigned int s = 8176ul]'
fs_493_testcase_a.cc:39:   instantiated from here
../poolallocator.hh:540: warning: dereferencing type-punned pointer might break strict-aliasing rules
fs_493_testcase_a: fs_493_testcase_a.cc:65: int main(): Assertion `alist.beforeHead_.next_->item_ == 1' failed.
make: *** [run] Aborted
$ rm fs_493_testcase_a; CXXFLAGS='-fstrict-aliasing -Wstrict-aliasing=2' make
g++ -fstrict-aliasing -Wstrict-aliasing=2 -std=c++0x -O2 -I.   fs_493_testcase_a.cc   -o fs_493_testcase_a
fs_493_testcase_a: fs_493_testcase_a.cc:65: int main(): Assertion `alist.beforeHead_.next_->item_ == 1' failed.
make: *** [run] Aborted
$ 
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http://www.dune-project.org/flyspray/index.php?do=details&task_id=491#comment1401

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