[...]

 15250K .......... .......... .......... .......... .......... 94% 8.00M 0s
 15300K .......... .......... .......... .......... .......... 95% 6.44M 0s
 15350K .......... .......... .......... .......... .......... 95%  114M 0s
 15400K .......... .......... .......... .......... .......... 95%  140M 0s
 15450K .......... .......... .......... .......... .......... 95% 77.4M 0s
 15500K .......... .......... .......... .......... .......... 96%  175M 0s
 15550K .......... .......... .......... .......... .......... 96% 78.9M 0s
 15600K .......... .......... .......... .......... .......... 96% 99.2M 0s
 15650K .......... .......... .......... .......... .......... 97% 79.9M 0s
 15700K .......... .......... .......... .......... .......... 97% 5.56M 0s
 15750K .......... .......... .......... .......... .......... 97%  221M 0s
 15800K .......... .......... .......... .......... .......... 98% 3.65M 0s
 15850K .......... .......... .......... .......... .......... 98% 7.88M 0s
 15900K .......... .......... .......... .......... .......... 98% 6.43M 0s
 15950K .......... .......... .......... .......... .......... 99%  104M 0s
 16000K .......... .......... .......... .......... .......... 99%  156M 0s
 16050K .......... .......... .......... .......... .......... 99%  128M 0s
 16100K .......... .......... .......... .......... .......... 99% 69.3M 0s
 16150K ....                                                  100% 8725G=1.4s
2019-10-30 16:58:57 (11.6 MB/s) - 'rust-std-1.37.0-x86_64-unknown-linux-gnux32.tar.xz' saved [16542284/16542284]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/rust-1.38.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	 bootstrap full_debuginfo tests
--without:	 cargo rustc system_llvm
Writing git revision for tag auto/ti/rust-1.38.0-1
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.90
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf rustc-1.38.0-src
Begin-TLD-Builder-Info
Build-Time: user:20.41s sys:4.15s real:85.63s (faults io:296 non-io:123504)
Files queued for ftp:
 455230610 rust-1.38.0-1.src.rpm
       183 rust-1.38.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info