test --verbose alexjs
==> brew test --verbose alexjs
Testing alexjs
/usr/bin/sandbox-exec -f /private/tmp/homebrew20200421-31578-r3thdm.sb ruby -W0 -I $LOAD_PATH -- /usr/local/Homebrew/Library/Homebrew/test.rb /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/alexjs.rb --verbose
==> /usr/local/Cellar/alexjs/8.1.1/bin/alex test.txt 2>&1
sh: line 1: 31587 Abort trap: 6 /usr/local/Cellar/alexjs/8.1.1/bin/alex test.txt 2>&1
dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.64.dylib