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-rw-r--r--vm_dump.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/vm_dump.c b/vm_dump.c
index 0aa8dae..7667cb6 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -570,12 +570,18 @@ rb_vmdebug_thread_dump_state(VALUE self)
static int
bugreport_backtrace(void *arg, VALUE file, int line, VALUE method)
{
+ const char *filename = NIL_P(file) ? "ruby" : RSTRING_PTR(file);
if (!*(int *)arg) {
fprintf(stderr, "-- Ruby level backtrace information "
"----------------------------------------\n");
*(int *)arg = 1;
}
- fprintf(stderr, "%s:%d:in `%s'\n", RSTRING_PTR(file), line, RSTRING_PTR(method));
+ if (NIL_P(method)) {
+ fprintf(stderr, "%s:%d:in unknown method\n", filename, line);
+ }
+ else {
+ fprintf(stderr, "%s:%d:in `%s'\n", filename, line, RSTRING_PTR(method));
+ }
return 0;
}