From b4b78ce2b9ae161a11cd7b30b0a16f8b91850f5e Mon Sep 17 00:00:00 2001
From: "dgp@users.sourceforge.net" <dgp>
Date: Wed, 8 Apr 2015 14:37:58 +0000
Subject: Proposed fix.

---
 generic/tclExecute.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index f2f475a..feff85b 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -4946,6 +4946,7 @@ TEBCresume(
 	pc += pcAdjustment;
 	TEBC_YIELD();
 
+	TclMarkTailcall(interp);
 	oPtr = contextPtr->oPtr;
 	if (oPtr->flags & FILTER_HANDLING) {
 	    TclNRAddCallback(interp, FinalizeOONextFilter,
-- 
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