if the write channel is null treat it as Errno.EACCES

a NPE happens before when the writechannel was null. such a situation happens when you try to write a file inside classloader (uri:classloader://some.file) improving the error condition of #3557
jruby · Jan 11, 2016 · cbc0cb7 · cbc0cb7
1 parent 528dba7
commit cbc0cb7
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/core/src/main/java/org/jruby/util/io/PosixShim.java b/core/src/main/java/org/jruby/util/io/PosixShim.java
@@ -99,6 +99,10 @@ public int write(ChannelFD fd, byte[] bytes, int offset, int length, boolean non
                 // pretend the channel is nonblocking.
             }
 
+            if (fd.chWrite == null) {
+                errno = Errno.EACCES;
+                return -1;
+            }
             int written = fd.chWrite.write(tmp);
 
             if (written == 0 && length > 0) {