Re: Having problems generating a code coverage report

Hi,

> Thanks for the hint. I'm using Meson 1.3.2. Although it's not ancient
> (Feb 2024) there is 1.6.0 available. I'll try upgrading and let you
> know the results.

I upgraded to Meson 1.6.0 and Lcov 2.0-1. Unfortunately it doesn't work:

```
genhtml: ERROR: no data for line:864, TLA:UNC,
file:/home/eax/projects/c/postgresql/src/bin/psql/psqlscanslash.l
(use "genhtml --ignore-errors unmapped ..." to bypass this error)
Traceback (most recent call last):
File "/home/eax/.venv/bin/meson", line 8, in <module>
sys.exit(main())
^^^^^^
File "/home/eax/.venv/lib/python3.12/site-packages/mesonbuild/mesonmain.py",
line 293, in main
return run(sys.argv[1:], launcher)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/eax/.venv/lib/python3.12/site-packages/mesonbuild/mesonmain.py",
line 281, in run
return run_script_command(args[1], args[2:])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/eax/.venv/lib/python3.12/site-packages/mesonbuild/mesonmain.py",
line 222, in run_script_command
return module.run(script_args)
^^^^^^^^^^^^^^^^^^^^^^^
File "/home/eax/.venv/lib/python3.12/site-packages/mesonbuild/scripts/coverage.py",
line 208, in run
return coverage(options.outputs, options.source_root,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/eax/.venv/lib/python3.12/site-packages/mesonbuild/scripts/coverage.py",
line 148, in coverage
subprocess.check_call([genhtml_exe,
File "/usr/lib/python3.12/subprocess.py", line 413, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['genhtml', '--prefix',
'/home/eax/projects/c/postgresql/build', '--prefix',
'/home/eax/projects/c/postgresql', '--output-directory',
'/home/eax/projects/c/postgresql/build/meson-logs/coveragereport',
'--title', 'Code coverage', '--legend', '--show-details',
'--branch-coverage',
'/home/eax/projects/c/postgresql/build/meson-logs/coverage.info']'
returned non-zero exit status 1.
ninja: build stopped: subcommand failed.
```

If I add `--ignore-errors unmapped` as suggested and execute:

```
genhtml --ignore-errors unmapped --prefix
/home/eax/projects/c/postgresql/build --prefix
/home/eax/projects/c/postgresql --output-directory
/home/eax/projects/c/postgresql/build/meson-logs/coveragereport
--title 'Code coverage' --legend --show-details --branch-coverage
/home/eax/projects/c/postgresql/build/meson-logs/coverage.info
```

... I get:

```
...
Processing file src/pl/plpython/plpy_util.c
lines=33 hit=22 functions=4 hit=4 branches=14 hit=5
Processing file src/include/catalog/index.h
lines=10 hit=10 functions=2 hit=2
genhtml: ERROR: duplicate merge record src/include/catalog
```

I didn't investigate further.

--
Best regards,
Aleksander Alekseev