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-rw-r--r--include/klee/Expr/ExprVisitor.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/klee/Expr/ExprVisitor.h b/include/klee/Expr/ExprVisitor.h
index 03d4d77d..1614b2f2 100644
--- a/include/klee/Expr/ExprVisitor.h
+++ b/include/klee/Expr/ExprVisitor.h
@@ -23,7 +23,7 @@ namespace klee {
     private:
       //      Action() {}
       Action(Kind _kind) 
-        : kind(_kind), argument(ConstantExpr::alloc(0, Expr::Bool)) {}
+        : kind(_kind), argument(nullptr) {}
       Action(Kind _kind, const ref<Expr> &_argument) 
         : kind(_kind), argument(_argument) {}