Avoid segfaults when RecordByteCodeStats() is called in a deleted interp.

2 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 80ca332..f9dbc26 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2011-07-15  Don Porter  <dgp@users.sourceforge.net>
 
+	* generic/tclCompile.c: Avoid segfaults when RecordByteCodeStats()
+	is called in a deleted interp.
+
 	* generic/tclCompile.c:	[Bug 467523, 3357771] Prevent circular
 	references in values with ByteCode intreps.  They can lead to
 	memory leaks. 
diff --git a/generic/tclCompile.c b/generic/tclCompile.c
index 8aedf95..ae633ea 100644
--- a/generic/tclCompile.c
+++ b/generic/tclCompile.c
@@ -4572,6 +4572,11 @@ RecordByteCodeStats(
     Interp *iPtr = (Interp *) *codePtr->interpHandle;
     register ByteCodeStats *statsPtr = &iPtr->stats;
 
+    if (iPtr == NULL) {
+	/* Avoid segfaulting in case we're called in a deleted interp */
+	return;
+    }
+
     statsPtr->numCompilations++;
     statsPtr->totalSrcBytes += (double) codePtr->numSrcBytes;
     statsPtr->totalByteCodeBytes += (double) codePtr->structureSize;