[SERVER-19612] JSThread exception messages are not printed when using SpiderMonkey - MongoDB Jira

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Steps To Reproduce:

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load('jstests/libs/parallelTester.js');

var fn = function() {throw new Error('print me');};

var t = new ScopedThread(fn);

t.start();

t.join();

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load('jstests/libs/parallelTester.js'); var fn = function() {throw new Error('print me');}; var t = new ScopedThread(fn); t.start(); t.join();

The included JS test prints out this exception info in 3.1.5 (notice 'print me' in the output):

MongoDB shell version: 3.1.5

connecting to: test

connecting to: test

2015-07-27T16:41:53.861-0400 I -        [thread1] js thread raised js exception: Error: print me

    at ____MongoToV8_newFunction_temp (<anonymous>:1:53)

Here's the output from master (notice that 'print me' is missing):

MongoDB shell version: 3.1.7-pre-

connecting to: test

connecting to: test

2015-07-27T16:42:08.329-0400 I QUERY    [thread2] js thread raised js exception: JSInterpreterFailure Unknown callThread failure

2015-07-27T16:42:08.336-0400 I QUERY    [thread2] js thread threw c++ exception: JSInterpreterFailure Unknown callThread failure