1 files changed, 2 insertions, 4 deletions
diff --git a/parse.y b/parse.y
index 0791284141..fd1e33a62c 100644
--- a/parse.y
+++ b/parse.y
@@ -4674,10 +4674,11 @@ coverage(const char *f, int n)
 {
     extern VALUE rb_vm_get_coverages(void);
     VALUE coverages = rb_vm_get_coverages();
-    if (RTEST(coverages)) {
+    if (RTEST(coverages) && RBASIC(coverages)->klass == 0) {
 	VALUE fname = rb_str_new2(f);
 	VALUE lines = rb_ary_new2(n);
 	int i;
+	RBASIC(lines)->klass = 0;
 	for (i = 0; i < n; i++) RARRAY_PTR(lines)[i] = Qnil;
 	RARRAY(lines)->len = n;
 	rb_hash_aset(coverages, fname, lines);
@@ -4718,9 +4719,6 @@ yycompile0(VALUE arg, int tracing)
 
     parser_prepare(parser);
     n = yyparse((void*)parser);
-    if (ruby_coverage) {
-	rb_ary_freeze(ruby_coverage);
-    }
     ruby_debug_lines = 0;
     ruby_coverage = 0;
     compile_for_eval = 0;