[Dune] [#1061] test failures on i386

[Dune]

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FS#1061 - test failures on i386
User who did this - Ansgar Burchardt (ansgar)

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I was not lucky and it claims the difference is 0.0, but the equality test failed:

Error: glob_copy != glob: 8.333333333333333217685101601546e-03 != 8.333333333333333217685101601546e-03
  difference is 0.000000000000000000000000000000e+00

In any case revision 7990 now passes the tests and was built successfully by Debian's i386 autobuilder, so I don't think its worth looking what exactly the compiler does here.

The (patched) code leading to this was

      if (glob_copy != glob) {
        std::cerr << std::scientific << std::setprecision(30) << "Error: glob_copy != glob: " << glob_copy << " != " << glob << std::endl;
        std::cerr << std::scientific << std::setprecision(30) << "  difference is " << (glob_copy - glob) << std::endl;
        abort();
      }

Ansgar

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