It seems that raco setup is hanging during the build of 6.12 on
Debian/s390x [1].
The last lines look like:
racket/racket3m -X "/<<BUILDDIR>>/racket-6.12+dfsg1/debian/tmp/usr/share/racket/collects" -G "/<<BUILDDIR>>/racket-6.12+dfsg1/debian/tmp/etc/racket" --no-user-path -N "raco" -l- setup --no-user -j 2 --no-docs --no-zo
raco setup: bootstrapping from source...
triggered by use of non-".zo" file
path: /<<BUILDDIR>>/racket-6.12+dfsg1/debian/tmp/usr/share/racket/collects/compiler/cm.rkt
I can duplicate this interactively. Any suggestions to debug?
[1]
https://buildd.debian.org/status/fetch.php?pkg=racket&arch=s390x&ver=6.12%2Bdfsg1-1&stamp=1520860407&raw=0