Yes, it doesnt make any sence, it still runs with system-wide Java (1.7):
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/logstash/Logstash : Unsupported major.minor version 52.0
Even if I run JAVA_HOME=/some/unexisting/folder bin/logstash -f logstash.conf &, it still uses system Java.