diff options
Diffstat (limited to 'gcc/testsuite/gfortran.dg/rewind_1.f90')
| -rw-r--r-- | gcc/testsuite/gfortran.dg/rewind_1.f90 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/rewind_1.f90 b/gcc/testsuite/gfortran.dg/rewind_1.f90 new file mode 100644 index 000000000..92edf6dfe --- /dev/null +++ b/gcc/testsuite/gfortran.dg/rewind_1.f90 @@ -0,0 +1,20 @@ +! { dg-do run } +! { dg-options "-std=legacy" } +! +! Check that rewind doesn't delete a file. +! Writing to the file truncates it at the end of the current record. Out +! IO library was defering the actual truncation until the file was rewound. +! A second rewind would then (incorrectly) think the file had just been +! written to, and truncate the file to zero length. +program foo + character*11 s + open(unit=11, status="SCRATCH") + write(11, '(a11)') "Hello World" + rewind(11) + rewind(11) + s = "" + read(11, '(a11)') s + close(11) + if (s .ne. "Hello World") call abort +end program + |