Source: notmuch Version: 0.38.3-2 Severity: serious Tags: ftbfs As of gdb 15.1-1, the binary package gdb has Provides: gdb-minimal. notmuch has Build-Conflicts: gdb-minimal and Build-Depends: gdb. Because this can't be resolved, notmuch is unable to build.
I suggest removing Build-Conflicts: gdb-minimal. Thank you, Jeremy Bícha