Bug 574818 - Deadlock in IOConsoleInputStream.close

Avoid calling into console.streamClosed(this) holding the lock on the
stream.

Change-Id: I91de4be61d6da666425c0d70e772eb6137ef2d3a
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/183022
Tested-by: Platform Bot <platform-bot@eclipse.org>

org.eclipse.ui.console/src/org/eclipse/ui/console/IOConsoleInputStream.java

diff --git a/org.eclipse.ui.console/src/org/eclipse/ui/console/IOConsoleInputStream.java b/org.eclipse.ui.console/src/org/eclipse/ui/console/IOConsoleInputStream.java
index 56464eb..1b94147 100644
--- a/org.eclipse.ui.console/src/org/eclipse/ui/console/IOConsoleInputStream.java
+++ b/org.eclipse.ui.console/src/org/eclipse/ui/console/IOConsoleInputStream.java
@@ -56,7 +56,7 @@
 	/**
 	 * Flag to indicate that the stream has been closed.
 	 */
-	private boolean closed = false;
+	private volatile boolean closed;
 
 	/**
 	 * The console that this stream is connected to.
@@ -251,13 +251,19 @@
 	}
 
 	@Override
-	public synchronized void close() throws IOException {
+	public void close() throws IOException {
 		if(closed) {
 			// Closeable#close() has no effect if already closed
 			return;
 		}
-		closed = true;
-		notifyAll();
+		synchronized (this) {
+			if (closed) {
+				return;
+			}
+			closed = true;
+			notifyAll();
+		}
+		// Locked in the console
 		console.streamClosed(this);
 	}
 }