[Bug fortran/50721] New: [4.6/4.7 Regression] gfortran miscompiles FGSL

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50721

             Bug #: 50721
           Summary: [4.6/4.7 Regression] gfortran miscompiles FGSL
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: bur...@gcc.gnu.org


That's with FGSL version 0.9.3 from
http://www.lrz.de/services/software/mathematik/gsl/fortran/

Using gfortran 4.7 or 4.6 to compile the library and the tests/poly.f90 test
case shows a miscompile:

$ ./poly.exe 
OK: All 25 tests passed
Bus error (core dumped)

As the stack is destroyed, one cannot get a good backtrace or error message.
The error occurs after calling
  call unit_finalize()
Thus, either at the cleanup of poly() or when leaving main().


The program works with gfortran 4.5 - and the other test cases seem to work
fine.

Fails:  2010-04-30-r158919   
Works:  2010-04-29-r158905