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-rw-r--r--src/BlockTracer.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/BlockTracer.h b/src/BlockTracer.h
index 40d80da1a..a18c8df4d 100644
--- a/src/BlockTracer.h
+++ b/src/BlockTracer.h
@@ -28,6 +28,9 @@ public:
class cCallbacks abstract
{
public:
+ // Force a virtual destructor in descendants:
+ virtual ~cCallbacks() {}
+
/** Called on each block encountered along the path, including the first block (path start)
When this callback returns true, the tracing is aborted.
*/