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I assume it can also be used for java server side code?

Yes, it can be used with most Java code you can build on the command line. Just run "infer -- <your_build_command>". Currently, this works with javac, Ant, Maven, and Gradle. See http://fbinfer.com/docs/hello-world.html#hello-world-android for a Gradle example.

I thought I'd try it with a fairly large project (353K lines of Java) at https://git.eclipse.org/c/hudson/org.eclipse.hudson.core.git...

This is a multi-level project. At both the top level and the individual module level, the command below seems to do exactly nothing. Actual output:

org.eclipse.hudson.core$ infer -- mvn build

org.eclipse.hudson.core$ cd hudson-core/

hudson-core$ infer -- mvn build

hudson-core$

I just used it to evaluate a rather large (50k LOC) java8 application deployed as a war to tomcat8. ( infer -- gradle build ) and it found a bunch of null refs that IntelliJ and humans had all missed.

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