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-rw-r--r--src/driver.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/driver.c b/src/driver.c
index c43b899..d8cd143 100644
--- a/src/driver.c
+++ b/src/driver.c
@@ -20,6 +20,7 @@ int imp_driver_interpret_file (IMP_InterpreterContext *context, const char *path
yyin = fopen(path, "r");
if (!yyin) return -1;
yyrestart(yyin);
+ ast_root = NULL;
if (yyparse()) {
imp_ast_destroy(ast_root);
fclose(yyin);
@@ -37,6 +38,7 @@ int imp_driver_interpret_file (IMP_InterpreterContext *context, const char *path
int imp_driver_interpret_str (IMP_InterpreterContext *context, const char *str) {
YY_BUFFER_STATE buf = yy_scan_string(str);
+ ast_root = NULL;
if (yyparse()) {
imp_ast_destroy(ast_root);
yy_delete_buffer(buf);