zlib: do not crash on write after close

fix #7767

Signed-off-by: Fedor Indutny <fedor@indutny.com>

lib/zlib.js

@@ -320,6 +320,7 @@ function Zlib(opts, mode) {
 util.inherits(Zlib, Transform);
 
 Zlib.prototype.reset = function reset() {
+  assert(!this._closed, 'zlib binding closed');
   return this._binding.reset();
 };
 
@@ -394,6 +395,8 @@ Zlib.prototype._transform = function(chunk, encoding, cb) {
   var availOutBefore = this._chunkSize - this._offset;
   var inOff = 0;
 
+  if (this._closed)
+    return cb(new Error('zlib binding closed'));
   var req = this._binding.write(flushFlag,
                                 chunk, // in
                                 inOff, // in_off
@@ -435,6 +438,7 @@ Zlib.prototype._transform = function(chunk, encoding, cb) {
       inOff += (availInBefore - availInAfter);
       availInBefore = availInAfter;
 
+      assert(!self._closed, 'zlib binding closed');
       var newReq = self._binding.write(flushFlag,
                                        chunk,
                                        inOff,

test/simple/test-zlib-write-after-close.js

@@ -0,0 +1,40 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common.js');
+var assert = require('assert');
+var zlib = require('zlib');
+
+var closed = false;
+
+zlib.gzip('hello', function(err, out) {
+  var unzip = zlib.createGunzip();
+  unzip.close(function() {
+    closed = true;
+  });
+  assert.throws(function() {
+    unzip.write(out);
+  });
+});
+
+process.on('exit', function() {
+  assert(closed);
+});