From bd3d162f011f2a5728eaffba2ad513bf15d6d3e6 Mon Sep 17 00:00:00 2001
From: dgp <dgp@users.sourceforge.net>
Date: Mon, 19 Sep 2011 14:41:22 +0000
Subject: Plug leak of a ReflectedChannel in test iocmd.tf-32.0

---
 generic/tclIORChan.c | 58 ++++++++++++++++++++++++++++++++--------------------
 1 file changed, 36 insertions(+), 22 deletions(-)

diff --git a/generic/tclIORChan.c b/generic/tclIORChan.c
index acf7365..da6f642 100644
--- a/generic/tclIORChan.c
+++ b/generic/tclIORChan.c
@@ -1066,15 +1066,9 @@ ReflectClose(
 	    ForwardOpToOwnerThread(rcPtr, ForwardedClose, &p);
 	    result = p.base.code;
 
-	    /*
-	     * FreeReflectedChannel is done in the forwarded operation!, in
-	     * the other thread. rcPtr here is gone!
-	     */
-
 	    if (result != TCL_OK) {
 		FreeReceivedError(&p);
 	    }
-	    return EOK;
 	}
 #endif
 
@@ -1105,10 +1099,7 @@ ReflectClose(
 	ForwardOpToOwnerThread(rcPtr, ForwardedClose, &p);
 	result = p.base.code;
 
-	/*
-	 * FreeReflectedChannel is done in the forwarded operation!, in the
-	 * other thread. rcPtr here is gone!
-	 */
+        Tcl_EventuallyFree (rcPtr, (Tcl_FreeProc *) FreeReflectedChannel);
 
 	if (result != TCL_OK) {
 	    PassReceivedErrorInterp(interp, &p);
@@ -2130,21 +2121,14 @@ NextHandle(void)
 }
 
 static void
-FreeReflectedChannel(
+FreeReflectedChannelArgs(
     ReflectedChannel *rcPtr)
 {
-    Channel *chanPtr = (Channel *) rcPtr->chan;
-    int i, n;
-
-    if (chanPtr->typePtr != &tclRChannelType) {
-	/*
-	 * Delete a cloned ChannelType structure.
-	 */
+    int i, n = rcPtr->argc - 2;
 
-	ckfree(chanPtr->typePtr);
+    if (n < 0) {
+	return;
     }
-
-    n = rcPtr->argc - 2;
     for (i=0; i<n; i++) {
 	Tcl_DecrRefCount(rcPtr->argv[i]);
     }
@@ -2155,6 +2139,25 @@ FreeReflectedChannel(
 
     Tcl_DecrRefCount(rcPtr->argv[n+1]);
 
+    rcPtr->argc = 1;
+}
+
+static void
+FreeReflectedChannel(
+    ReflectedChannel *rcPtr)
+{
+    Channel *chanPtr = (Channel *) rcPtr->chan;
+
+    if (chanPtr->typePtr != &tclRChannelType) {
+	/*
+	 * Delete a cloned ChannelType structure.
+	 */
+
+	ckfree(chanPtr->typePtr);
+    }
+
+    FreeReflectedChannelArgs(rcPtr);
+
     ckfree(rcPtr->argv);
     ckfree(rcPtr);
 }
@@ -2506,6 +2509,11 @@ DeleteReflectedChannelMap(
 	 */
 
 	evPtr = resultPtr->evPtr;
+
+	/* Basic crash safety until this routine can get revised [3411310] */
+	if (evPtr == NULL) {
+	    continue;
+	}
 	paramPtr = evPtr->param;
 
 	evPtr->resultPtr = NULL;
@@ -2639,6 +2647,11 @@ DeleteThreadReflectedChannelMap(
 	 */
 
 	evPtr = resultPtr->evPtr;
+
+	/* Basic crash safety until this routine can get revised [3411310] */
+	if (evPtr == NULL ) {
+	    continue;
+	}
 	paramPtr = evPtr->param;
 
 	evPtr->resultPtr = NULL;
@@ -2665,6 +2678,7 @@ DeleteThreadReflectedChannelMap(
 	ReflectedChannel *rcPtr = Tcl_GetChannelInstanceData(chan);
 
 	rcPtr->interp = NULL;
+	FreeReflectedChannelArgs(rcPtr);
 	Tcl_DeleteHashEntry(hPtr);
     }
     ckfree(rcmPtr);
@@ -2862,7 +2876,7 @@ ForwardProc(
                                  Tcl_GetChannelName(rcPtr->chan));
 	Tcl_DeleteHashEntry(hPtr);
 
-        Tcl_EventuallyFree (rcPtr, (Tcl_FreeProc *) FreeReflectedChannel);
+	FreeReflectedChannelArgs(rcPtr);
 	break;
 
     case ForwardedInput: {
-- 
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