1 files changed, 14 insertions, 2 deletions

diff --git a/vm_dump.c b/vm_dump.c
index 1c1a36eca9..c2fa33fd4a 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -675,14 +675,26 @@ rb_vm_bugreport(void)
     if (vm) {
 	int i;
 	VALUE name;
+	long len;
+	const int max_name_length = 1024;
+# define LIMITED_NAME_LENGTH(s) \
+	(((len = RSTRING_LEN(s)) > max_name_length) ? max_name_length : (int)len)
 
 	name = vm->progname;
-	fprintf(stderr, "* Loaded script: %s\n", StringValueCStr(name));
+	fprintf(stderr, "* Loaded script: %.*s\n",
+		LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
 	fprintf(stderr, "\n");
 	fprintf(stderr, "* Loaded features:\n\n");
 	for (i=0; i<RARRAY_LEN(vm->loaded_features); i++) {
 	    name = RARRAY_PTR(vm->loaded_features)[i];
-	    fprintf(stderr, " %4d %s\n", i, StringValueCStr(name));
+	    if (RB_TYPE_P(name, T_STRING)) {
+		fprintf(stderr, " %4d %.*s\n", i,
+			LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
+	    }
+	    else {
+		fprintf(stderr, " %4d #<%s:%p>\n", i,
+			rb_class2name(CLASS_OF(name)), (void *)name);
+	    }
 	}
 	fprintf(stderr, "\n");
     }