2 files changed, 3 insertions, 4 deletions
diff --git a/lib/Core/Executor.cpp b/lib/Core/Executor.cpp
index 49df9790..eccdf9eb 100644
--- a/lib/Core/Executor.cpp
+++ b/lib/Core/Executor.cpp
@@ -4734,9 +4734,7 @@ void Executor::getConstraintLog(const ExecutionState &state, std::string &res,
   switch (logFormat) {
   case STP: {
     Query query(state.constraints, ConstantExpr::alloc(0, Expr::Bool));
-    char *log = solver->getConstraintLog(query);
-    res = std::string(log);
-    free(log);
+    res = solver->getConstraintLog(query);
   } break;
 
   case KQUERY: {
diff --git a/lib/Core/TimingSolver.h b/lib/Core/TimingSolver.h
index 0b88be3c..4042c724 100644
--- a/lib/Core/TimingSolver.h
+++ b/lib/Core/TimingSolver.h
@@ -16,6 +16,7 @@
 #include "klee/System/Time.h"
 
 #include <memory>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -41,7 +42,7 @@ public:
 
   void setTimeout(time::Span t) { solver->setCoreSolverTimeout(t); }
 
-  char *getConstraintLog(const Query &query) {
+  std::string getConstraintLog(const Query &query) {
     return solver->getConstraintLog(query);
   }