1 files changed, 20 insertions, 0 deletions
diff --git a/interpret.h b/interpret.h
index ca67e966..ef087951 100644
--- a/interpret.h
+++ b/interpret.h
@@ -742,6 +742,26 @@ mod:
 			}
 			break;
 
+		case Op_clear_var:
+			/*
+			 * Clear variable to the undefined value
+			 * that is equal to 0 and "" represented by
+			 * the global Nnull_string.
+			 * This is used by @let to initialize
+			 * locals, which may re-use previously
+			 * initialized frame locations.
+			 */
+			lhs = get_lhs(pc->memory, false);
+
+			/*
+			 * If it's already clear, nothing to do
+			 */
+			if (*lhs != Nnull_string) {
+				unref(*lhs);
+				*lhs = dupnode(Nnull_string);
+			}
+			break;
+
 		case Op_store_field:
 		{
 			/* field assignment optimization,