[...]

mpositionExclusions.txt having proper md5sum already exists
NormalizationTest.txt having proper md5sum already exists
SpecialCasing.txt having proper md5sum already exists
UnicodeData.txt having proper md5sum already exists
./builder[2756]: ulimit: exceeds allowable limit
warning: Macro expanded in comment on line 297: %{version},%{release} macros may not be used directly as they take last
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/ruby-2.6.10-4.src.rpm
real 2.55
user 2.14
sys 0.06
warning: Macro expanded in comment on line 297: %{version},%{release} macros may not be used directly as they take last
Writing git revision for tag tld/ruby-2.6.10-4
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:6.05s sys:1.15s real:11.32s (faults io:14 non-io:477236)
Files queued for ftp:
  52584895 ruby-2.6.10-4.src.rpm
       183 ruby-2.6.10-4.src.rpm.uploadinfo
End-TLD-Builder-Info