[Bug gcov-profile/80911] gcov failed: gcno corrupted

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80911

--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
For the files you provided:

$ gcov gcov-1.c && cat gcov-1.c.gcov 
/home/vries/gcc_versions/data/ref-master-17-05-24/src/gcc/testsuite/gcc.misc-tests/gcov-1.c:source
file is newer than notes file 'gcov-1.gcno'
(the message is displayed only once per source file)
File
'/home/vries/gcc_versions/data/ref-master-17-05-24/src/gcc/testsuite/gcc.misc-tests/gcov-1.c'
Lines executed:100.00% of 6
Creating 'gcov-1.c.gcov'

        -:   
0:Source:/home/vries/gcc_versions/data/ref-master-17-05-24/src/gcc/testsuite/gcc.misc-tests/gcov-1.c
        -:    0:Graph:gcov-1.gcno
        -:    0:Data:gcov-1.gcda
        -:    0:Runs:2
        -:    0:Programs:1
        -:    0:Source is newer than graph
        -:    1:/* Test Gcov basics.  */
        -:    2:
        -:    3:/* { dg-options "-fprofile-arcs -ftest-coverage" } */
        -:    4:/* { dg-do run { target native } } */
        -:    5:
       20:    6:void noop ()
        -:    7:{
       20:    8:}
        -:    9:
        2:   10:int main ()
        -:   11:{
        -:   12:  int i;
        -:   13:
       22:   14:  for (i = 0; i < 10; i++)      /* count(11) */
       20:   15:    noop ();                    /* count(10) */
        -:   16:
        2:   17:  return 0;                     /* count(1) */
        -:   18:}
        -:   19:
        -:   20:/* { dg-final { run-gcov gcov-1.c } } */