Comment # 2 on bug 992065 from Dominique Leuenberger

Additionally (it's actually a different bug, but when touching the .spec,
probably simple enough to fix while going along):

(2/2) Removing libmozjs-38-38.0.0-2.2.x86_64
...................................................................................................[done]
Additional rpm output:
/sbin/ldconfig: relative path `0' used to build cache
warning: %postun(libmozjs-38-38.0.0-2.2.x86_64) scriptlet failed, exit status 1

Very likely you use %post -p /sbin/ldconfig

and the .spec contains comments before the next section in the .spec starts