Occasional mac build failures, with logs ending as follows, perhaps related to "Warning: Could not detect Qt's path, skipping plugin deployment!"
make[1]: Entering directory '/home/travis/build/bitcoin/bitcoin/build/bitcoin-x86_64-apple-darwin11'
make[1]: Nothing to be done for 'all-am'.
make[1]: Leaving directory '/home/travis/build/bitcoin/bitcoin/build/bitcoin-x86_64-apple-darwin11'
make -C src qt/bitcoin-qt
make[1]: Entering directory '/home/travis/build/bitcoin/bitcoin/build/bitcoin-x86_64-apple-darwin11/src'
make[1]: Leaving directory '/home/travis/build/bitcoin/bitcoin/build/bitcoin-x86_64-apple-darwin11/src'
/bin/mkdir -p Bitcoin-Qt.app/Contents/MacOS
STRIPPROG="/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/x86_64-apple-darwin11-strip" /bin/bash /home/travis/build/bitcoin/bitcoin/build/bitcoin-x86_64-apple-darwin11/build-aux/install-sh -c -s src/qt/bitcoin-qt Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt
INSTALLNAMETOOL=/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/x86_64-apple-darwin11-install_name_tool OTOOL=/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/x86_64-apple-darwin11-otool STRIP=/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/x86_64-apple-darwin11-strip /usr/bin/python3.6 ./contrib/macdeploy/macdeployqtplus Bitcoin-Qt.app -translations-dir=/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../translations -add-qt-tr da,de,es,hu,ru,uk,zh_CN,zh_TW -verbose 2
+ Copying source bundle +
+ Deploying frameworks +
Warning: Could not find any external frameworks to deploy in dist/Bitcoin-Qt.app.
+ Installing qt.conf +
+ Adding Qt translations +
+ Done +
Warning: Could not detect Qt's path, skipping plugin deployment!
/bin/mkdir -p dist/.background
/usr/bin/tiffcp -c none dpi36.background.tiff dpi72.background.tiff dist/.background/background.tiff
/usr/bin/python3.6 contrib/macdeploy/custom_dsstore.py "dist/.DS_Store" "Bitcoin-Core"
/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/genisoimage -no-cache-inodes -D -l -probe -V "Bitcoin-Core" -no-pad -r -dir-mode 0755 -apple -o Bitcoin-Core.dmg dist
/home/travis/build/bitcoin/bitcoin/depends/x86_64-apple-darwin11/share/../native/bin/genisoimage: Warning: assuming PC Exchange cluster size of 512 bytes
30.79% done, estimate finish Thu Jun 14 09:33:16 2018
61.60% done, estimate finish Thu Jun 14 09:33:16 2018
92.30% done, estimate finish Thu Jun 14 09:33:16 2018
Total translation table size: 0
Total rockridge attributes bytes: 3197
Total directory bytes: 13084
Path table size(bytes): 118
Max brk space used 0
16257 extents written (31 MB)
The command "DOCKER_EXEC make $MAKEJOBS $GOAL || ( echo "Build failure. Verbose build follows." && DOCKER_EXEC make $GOAL V=1 ; false )" exited with 1.
[...]
Done. Your build exited with 1.
E.g: https://travis-ci.org/bitcoin/bitcoin/jobs/392160315 #13235 https://travis-ci.org/bitcoin/bitcoin/jobs/392060921 https://travis-ci.org/bitcoin/bitcoin/jobs/392041383 #13467 https://travis-ci.org/bitcoin/bitcoin/jobs/391907335 #13460
Also hit #13461 (comment)