FULL PRODUCT VERSION :
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Darwin pcofthenight 15.6.0 Darwin Kernel Version 15.6.0: Mon Aug 29 20:21:34 PDT 2016; root:xnu-3248.60.11~1/RELEASE_X86_64 x86_64

A DESCRIPTION OF THE PROBLEM :
Using a lambda expression in this context...

    private static final String[] LANGUAGE_CODES = { "en", "pl" };
    private static final String LANGUAGES_JSON = "{\"data\":{\"languages\":[" + Arrays.stream(LANGUAGE_CODES)
        .map(c -> "{\"language\":\"" + c + "\"}").collect(Collectors.joining(",")) + "]}}";

... causes a stack overflow that looks like...

java.lang.StackOverflowError
        at com.sun.tools.javac.comp.Attr.lambdaEnv(Attr.java:2638)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2304)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2434)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Put this in a java file, then run "javac JavaCrash.java":

import java.util.Arrays;
import java.util.stream.Collectors;

public class JavaCrash
{
    private static final String[] LANGUAGE_CODES = { "en", "pl" };
    private static final String LANGUAGES_JSON = "{\"data\":{\"languages\":[" + Arrays.stream(LANGUAGE_CODES)
        .map(c -> "{\"language\":\"" + c + "\"}").collect(Collectors.joining(",")) + "]}}";

    public static void main(String[] args)
    {
        System.out.println(LANGUAGES_JSON);
    }
}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
It compiles and works correctly.
ACTUAL -
The system is out of resources.
Consult the following stack trace for details.
java.lang.StackOverflowError
        at com.sun.tools.javac.comp.Attr.lambdaEnv(Attr.java:2638)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2304)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2434)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2434)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
.......


ERROR MESSAGES/STACK TRACES THAT OCCUR :
The system is out of resources.
Consult the following stack trace for details.
java.lang.StackOverflowError
        at com.sun.tools.javac.comp.Attr.lambdaEnv(Attr.java:2638)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2304)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2434)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2434)
        at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
.......


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.Arrays;
import java.util.stream.Collectors;

public class JavaCrash
{
    private static final String[] LANGUAGE_CODES = { "en", "pl" };
    private static final String LANGUAGES_JSON = "{\"data\":{\"languages\":[" + Arrays.stream(LANGUAGE_CODES)
        .map(c -> "{\"language\":\"" + c + "\"}").collect(Collectors.joining(",")) + "]}}";

    public static void main(String[] args)
    {
        System.out.println(LANGUAGES_JSON);
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Just use a static initializer and for loop instead of a stream.