This bug was fixed in the package postfix - 3.4.5-1ubuntu1
--------------- postfix (3.4.5-1ubuntu1) eoan; urgency=medium
* d/p/80_glibc2.30-ftbfs.diff: fix build with glibc 2.30 (LP: #1842923)
-- Andreas Hasenack <email address hidden> Thu, 05 Sep 2019 10:01:24 -0300
This bug was fixed in the package postfix - 3.4.5-1ubuntu1
---------------
postfix (3.4.5-1ubuntu1) eoan; urgency=medium
* d/p/80_ glibc2. 30-ftbfs. diff: fix build with glibc 2.30 (LP: #1842923)
-- Andreas Hasenack <email address hidden> Thu, 05 Sep 2019 10:01:24 -0300