I find this hard to believe but a g77 code that has been in use for years
crashed at the first OPEN statement when compiled with gfortran 4.3.1. Attached
15 line  test program reproduces the effect, stops at line 8 with the error
message:

At line 8 of file testlun.f
Fortran runtime error: Unit number in I/O statement too large

but the unit number was set to 12. Investigation shows it can be set to any
value, even 1. 

I am guessing this is hardware-related. It is a new system--ASUS MB with Intel
Core I7 CPU. Identical code runs fine with same gfortran installed on a system
equipped with an earlier Intel chip.


-- 
           Summary: RTE: "Unit number in I/O statement too large" -- falls
                    with any low value
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dtprice at shaw dot ca
 GCC build triplet: gfortran -Wall testfile.f
  GCC host triplet: Intel Core I7; SuSE 11;


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40638

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