add regression test

test/parallel/test-regress-GH-io-1811.js

@@ -0,0 +1,22 @@
+'use strict';
+
+const assert = require('assert');
+
+// Change kMaxLength for zlib to trigger the error
+// without having to allocate 1GB of buffers
+const smalloc = process.binding('smalloc');
+smalloc.kMaxLength = 128;
+const zlib = require('zlib');
+smalloc.kMaxLength = 0x3fffffff;
+
+const encoded = new Buffer('H4sIAAAAAAAAA0tMHFgAAIw2K/GAAAAA', 'base64');
+
+// Async
+zlib.gunzip(encoded, function(err) {
+  assert.ok(err instanceof RangeError);
+});
+
+// Sync
+assert.throws(function() {
+  zlib.gunzipSync(encoded);
+}, RangeError);