[Bug fortran/19691] New: gfortran reports "Internal Error: printf is broken"

["billingd at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The following case is reduced from a LAPACK testsuite failure on i686-pc-
cygwin with gfortran 20050129.  The equivalence is just a way to capture the 
floating point value that triggers the error.  Not sure yet if this a gfortran 
bug or a cygwin libc problem.

Test case is

      real r
      integer i
      equivalence (r,i)
      i = 2139095040
      write(6,*) 'r = ', r
      end

g77 gives: 
 r =   Inf

gfortran gives:
At line 5 of file printf_bug.f
Internal Error: printf is broken
 r =

-- 
           Summary: gfortran reports "Internal Error: printf is broken"
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: billingd at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19691