Do not swallow errors after parsing JSON body

lib/handleRequest.js

@@ -63,11 +63,14 @@ function jsonBody (req, res, params, context) {
     setImmediate(parse, body)
   }
   function parse (json) {
+    var parsed
     try {
-      jsonBodyParsed(null, JSON.parse(body), req, res, params, context)
+      parsed = JSON.parse(body)
     } catch (err) {
       jsonBodyParsed(err, null, req, res, params, context)
+      return
     }
+    jsonBodyParsed(null, parsed, req, res, params, context)
   }
 }
 

test/error-in-post.js

@@ -0,0 +1,36 @@
+'use strict'
+
+const t = require('tap')
+const Fastify = require('..')
+const fastify = Fastify()
+
+let errored = false
+
+fastify.route({
+  method: 'POST',
+  path: '/jsonBody',
+  handler: function (req, reply) {
+    throw new Error('kaboom')
+  }
+})
+
+const reqOpts = {
+  method: 'POST',
+  url: '/jsonBody',
+  payload: {
+    hello: 'world'
+  }
+}
+
+process.on('uncaughtException', (err) => {
+  errored = true
+  t.equal(err.message, 'kaboom')
+})
+
+fastify.inject(reqOpts, (res) => {
+  t.fail('should not be called')
+})
+
+process.on('beforeExit', () => {
+  t.ok(errored)
+})