2 files changed, 4 insertions, 0 deletions
diff --git a/ast.cpp b/ast.cpp
index f1cbcc0..4f68a17 100644
--- a/ast.cpp
+++ b/ast.cpp
@@ -1,4 +1,5 @@
 #include <stdexcept>
+#include <cstring>
 #include <cctype>
 #include "ast.h"
 
diff --git a/environment.cpp b/environment.cpp
index e375353..e49ec94 100644
--- a/environment.cpp
+++ b/environment.cpp
@@ -292,6 +292,9 @@ static bool hasFree(AST &ast,Index fromIndex){
 
 		case AST::Type::lambda:
 			return hasFree(*ast.lambdaval.body,fromIndex+1);
+
+		default:
+			throw logic_error("Unknown AST::Type?");
 	}
 }