Report line number in active file handle for test failures

I often use the DATA block for storing test data and process that in a loop. I just realized that warn() and die() report the line number of the current file handle but tests don’t. But that would be very handy for test statements repeated in a loop.

I think it should be possible to do so. Do you agree it’s desirable?

use Test2::V0;

is <DATA> => 'foo';
warn 'warns';
die 'dies';

__DATA__
bar

$ perl test.t
# Seeded srand with seed '20221020' from local date.
not ok 1
# Failed test at test.t line 3.
# +-------+----+-------+
# | GOT   | OP | CHECK |
# +-------+----+-------+
# | bar\n | eq | foo   |
# +-------+----+-------+
warns at test.t line 4, <DATA> line 1.
dies at test.t line 5, <DATA> line 1.
# Tests were run but no plan was declared and done_testing() was not seen.
# Looks like your test exited with 255 after test #1.

I suggest the output should look like:

not ok 1
# Failed test at test.t line 3, <DATA> line 1.

Reproduce the DATA-block example from the issue and inspect the test-failure reporting path that emits the “Failed test” location. Compare it with the warn() and die() output, then verify that failures include the active file handle and line, as in the proposed output.