https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113897
Bug ID: 113897
Summary: Consecutive tab edits in format are not processed
correctly.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
Reporter: jvdelisle at gcc dot gnu.org
Target Milestone: ---
This issue found while working on pr109358.
program tabs
implicit none
integer :: fd
open(newunit=fd, file="test.txt", form="formatted")
write(fd, "(a)") "12345678901234567890123456789"
write(fd, "(i4, t25, t2, i4.4)") 1234, 0123
close(fd)
end program tabs
With gfortran gcc 10.4.1 20230121 (GCC)
$ gfc10 -static -o tabs.x tabs.f90
$ ./tabs.x
$ cat test.txt
12345678901234567890123456789
1234 0123
It seems to me this should be:
10123
Even though it is nonsensical to do this, it probably is valid. I will check
the standards.
