[Bug fortran/92569] gfortran read with end directive does not trigger in gfortran 9.2

[dojo at masterleep dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92569

--- Comment #3 from Bill Lipa <dojo at masterleep dot com> ---
Thanks for looking at it.  I studied it further and it seems that -O2 is the
culprit.  Could you please try to reproduce with -O2?

$ gfortran -O2 res.f
$ ./a.out 
At line 8 of file res.f (unit = 1, file = 'resultav4.dat')
Fortran runtime error: Read past ENDFILE record

Error termination. Backtrace:
#0  0x10221ea14
#1  0x10221f2c2
#2  0x10221fbca
#3  0x10234fe06
#4  0x102349a14
#5  0x10234b673
#6  0x10234bf75
#7  0x10234fa6c
#8  0x10234fb69
#9  0x102202cb0
#10  0x102202dde


$ gfortran res.f
$ ./a.out
     # data records  =           3