I have now attached an incremental debdiff for Mantic which will fix the problem.
This just removed two patches which Debian has already removed at https://salsa.debian.org/mckinstry/lcov/-/commit/3c952e83b08652ec4233de0b07a1c8b55109831e. These patches were modifying geninfo to add support for old gcc. But since gcc-13 will be installed by default in Mantic so these patches were creating new problems.
Since it is possible to install gcc-9 in Mantic, I have verified that none of the package in mantic or mantic-proposed works with gcc-9 currently. So removing these old patches will not introduce any regression.
I have now attached an incremental debdiff for Mantic which will fix the problem.
This just removed two patches which Debian has already removed at https:/ /salsa. debian. org/mckinstry/ lcov/-/ commit/ 3c952e83b08652e c4233de0b07a1c8 b55109831e. These patches were modifying geninfo to add support for old gcc. But since gcc-13 will be installed by default in Mantic so these patches were creating new problems.
Since it is possible to install gcc-9 in Mantic, I have verified that none of the package in mantic or mantic-proposed works with gcc-9 currently. So removing these old patches will not introduce any regression.