Comment # 1 on bug 1225754 from Bernhard Wiedemann

Here is a small reproducer:

cd ~/rpmbuild/BUILD/samba-4.20.1+git.335.0a46cdafe2 &&
 for i in $(seq 3) ; do perl "pidl/pidl" "--quiet"
"--includedir=/home/abuild/rpmbuild/BUILD/samba-4.20.1+git.335.0a46cdafe2/librpc/idl"
"--header" "--ndr-parser" "--client" "--python" "--outputdir"
"bin/default/source3/librpc/gen_ndr" "--" "source3/librpc/idl/smbXsrv.idl"
2>/dev/null ; md5sum bin/default/source3/librpc/gen_ndr/py_smbXsrv.c ; done
59d8aaa03d6e823a3895c7bed7a1f299 
bin/default/source3/librpc/gen_ndr/py_smbXsrv.c
b274520e585748db6cb33b025cfad66a 
bin/default/source3/librpc/gen_ndr/py_smbXsrv.c
0864b694bb939ce7aecf1079134943e7 
bin/default/source3/librpc/gen_ndr/py_smbXsrv.c

There is also plenty output on stderr such as
source3/librpc/idl/smbXsrv.idl:60: error: Unable to determine origin of type
`struct db_record'
that might be related.