diff --git a/boot/script-loader/mruby-lvgui-native/src/debug.c b/boot/script-loader/mruby-lvgui-native/src/debug.c
new file mode 100644
index 00000000..79d880c1
--- /dev/null
+++ b/boot/script-loader/mruby-lvgui-native/src/debug.c
@@ -0,0 +1,72 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include <mruby.h>
+#include <mruby/array.h>
+#include <mruby/irep.h>
+#include <mruby/variable.h>
+#include <mruby/string.h>
+#include <mruby/error.h>
+
+// Declares main_mrb_state, but more importantly, defines it weakly
+// so that if the stub does not provide it (or other mruby build does not)
+// this module still builds and links.
+mrb_state *main_mrb_state __attribute__ ((weak));
+
+// https://github.com/mruby/mruby/blob/f9d113f7647121f8578742a2a9ac256ece365e3f/src/backtrace.c#L79-L101
+static void
+print_backtrace(mrb_state *mrb, mrb_value backtrace)
+{
+  mrb_int i;
+  mrb_int n = RARRAY_LEN(backtrace);
+  mrb_value *loc/*, mesg*/;
+  FILE *stream = stderr;
+
+  if (n != 0) {
+    fprintf(stream, "trace (most recent call last):\n");
+    for (i=n-1,loc=&RARRAY_PTR(backtrace)[i]; i>0; i--,loc--) {
+      if (mrb_string_p(*loc)) {
+        fprintf(stream, "\t[%d] %.*s\n",
+                (int)i, (int)RSTRING_LEN(*loc), RSTRING_PTR(*loc));
+      }
+    }
+    if (mrb_string_p(*loc)) {
+      fprintf(stream, "\t[0] %.*s: ", (int)RSTRING_LEN(*loc), RSTRING_PTR(*loc));
+    }
+  }
+}
+
+void lv_debug_app_assert_handler(void)
+{
+	if (main_mrb_state != NULL) {
+		fprintf(stderr, "\n--[ lv_debug_app_assert_handler() ]--\n");
+		fprintf(stderr, "Backtrace:\n");
+		print_backtrace(main_mrb_state, mrb_get_backtrace(main_mrb_state));
+		mrb_close(main_mrb_state);
+		fprintf(stderr, "\n--[===============================]--\n");
+	}
+	else {
+		fprintf(stderr, "\nWarning: Could not get main_mrb_state to inspect mrb state.\n");
+		fprintf(stderr, "         This may mean the mruby startup stub did not setup `main_mrb_state`.\n");
+	}
+
+	// Assume we always want to
+	abort();
+}
+
+void
+mrb_mruby_lvgui_native_fragment_gem_init(mrb_state *mrb)
+{
+	if (main_mrb_state != NULL) {
+		fprintf(stderr, "Warning: mruby_lvgui_native_fragment_init clobbering previously defined mrb instance.\n");
+		fprintf(stderr, "         backtraces from lvgui asserts may not be correct.\n");
+	}
+	main_mrb_state = mrb;
+}
+
+void
+mrb_mruby_lvgui_native_fragment_gem_final(mrb_state *mrb)
+{
+	main_mrb_state = NULL;
+}
+