Index: qprocess_pm.cpp
===================================================================
--- qprocess_pm.cpp	(revision 185)
+++ qprocess_pm.cpp	(working copy)
@@ -63,7 +63,7 @@
 #include <sys/wait.h>
 #endif
 
-//#define QT_QPROCESS_DEBUG
+// #define QT_QPROCESS_DEBUG
 
 #define HF_STDIN        HFILE( 0 )
 #define HF_STDOUT       HFILE( 1 )
@@ -283,6 +283,7 @@
     QIntDict<QProcess> pipeKeys;
     PipeStates pipeStates;
     QMutex lock;
+    USHORT latestKey;
 };
 
 QProcessMonitor::QProcessMonitor()
@@ -298,6 +299,7 @@
     
     thread = new Thread( this );
     Q_ASSERT( thread != NULL );
+    latestKey = 0;
 }
 
 QProcessMonitor::~QProcessMonitor()
@@ -332,7 +334,10 @@
 
     Q_ASSERT( pipe->pipe != HP_NULL && pipe->key == KEY_NULL );
     
-    pipe->key = USHORT( pipe->pipe );
+    latestKey++;
+    if (latestKey == KEY_NULL) latestKey++; // avoid overflow to Null value
+    pipe->key = latestKey;
+    // pipe->key = USHORT( pipe->pipe );
     APIRET rc = DosSetNPipeSem( pipe->pipe, (HSEM) pipeSem, pipe->key );
     if ( rc != NO_ERROR ) {
 #if defined(QT_CHECK_STATE) || defined(QT_QPROCESS_DEBUG)
@@ -348,7 +353,6 @@
 void QProcessMonitor::removePipe( QProcessPrivate::Pipe *pipe )
 {
     Q_ASSERT( pipe->pipe != HP_NULL && pipe->key != KEY_NULL );
-
     /// @todo (r=dmik) is this really necessary to detach pipeSem?
     DosSetNPipeSem( pipe->pipe, 0, 0 );
     bool ok = pipeKeys.remove( pipe->key );