Since we switched to gcc10 as default compiler last week,
several formerly reproducible packages have changed status to unreproducible
in my reproducible-builds tests for openSUSE.

Examples are
dustrac
libzypp
rosegarden
solarus
spirv-tools
watchman
z3

When building without debuginfo, objdump -s
only shows a diff in the .note.gnu.build-id section

But when building with debuginfo, many more diffs appear in debug files.

All these builds pull in gcc10-c++-10.1.1 
so the problem might be limited to C++ .