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Re: Having problems generating a code coverage report

Álvaro Herrera <alvherre@kurilemu.de>

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From: Álvaro Herrera <alvherre@kurilemu.de>
To: Michael Paquier <michael@paquier.xyz>
Cc: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>, Tom Lane <tgl@sss.pgh.pa.us>, Aleksander Alekseev <aleksander@timescale.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Peter Geoghegan <pg@bowt.ie>
Date: 2026-02-26T12:35:35Z
Lists: pgsql-hackers 
On 2026-Feb-18, Michael Paquier wrote:

> Based on your ideas, I have been able to get my way through today with
> this modified artistic flavor, for a non-VPATH build, in a Fedora
> environment:
> make coverage-html \
>     LCOVFLAGS="-q --ignore-errors gcov,gcov" \
>     GENHTML_FLAGS="-q --legend --ignore-errors unmapped,corrupt,unmapped,inconsistent"

FWIW this has been failing all along (last report dates back Feb 17th),
now because of this:

lcov: ERROR: (negative) Unexpected negative hit count '-9' for line /home/coverage/pgsrc/pgsql/src/port/snprintf.c:529" while capturing from ./src/port/snprintf_shlib.gcda.
        (use "lcov --ignore-errors negative ..." to bypass this error)

I added this flag as well, and the report is now running; we should have
results soon.

I hope the lcov people find time to fix all these problems :-(

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"Pero la cosa no es muy grave ..."     (le petit Nicolas -- René Goscinny)