Fix the leaking file descriptor when returning a z3 smt check result (#1574)

3 years ago · 3d012818e9
parent 916a47286c
commit 3d012818e9
1 changed files with 8 additions and 7 deletions
--- a/mythril/laser/smt/solver/solver.py
+++ b/mythril/laser/smt/solver/solver.py
@ -54,7 +54,8 @@ class BaseSolver(Generic[T]):
        :return: The evaluated result which is either of sat, unsat or unknown
        """
        old_stdout = sys.stdout
-        sys.stdout = open(os.devnull, "w")
+        with open(os.devnull, "w") as dev_null_fd:
+            sys.stdout = dev_null_fd
            try:
                evaluate = self.raw.check(args)
            except z3.z3types.Z3Exception as e: