uc_emu_start() report error on illegal instruction at the output

regress/sigill2.c

@@ -0,0 +1,29 @@
+#include <unicorn/unicorn.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define UC_BUG_WRITE_SIZE 128
+#define UC_BUG_WRITE_ADDR 0x2000
+
+int main()
+{
+    int size;
+    uint8_t *buf;
+    uch uh;
+    uch uh_trap;
+    uc_err err = uc_open (UC_ARCH_X86, UC_MODE_64, &uh);
+    if (err) {
+        fprintf (stderr, "Cannot initialize unicorn\n");
+        return 1;
+    }
+    size = UC_BUG_WRITE_SIZE;
+    if (!uc_mem_map (uh, UC_BUG_WRITE_ADDR, size)) {
+        uc_mem_write (uh, UC_BUG_WRITE_ADDR,
+            (const uint8_t*)"\xff\xff\xff\xff\xff\xff\xff\xff", 8);
+    }
+    err = uc_emu_start (uh, UC_BUG_WRITE_ADDR, UC_BUG_WRITE_ADDR+8, 0, 1);
+    uc_close (&uh);
+    printf ("Error = %u (%s)\n", err, uc_strerror(err));
+    return err? -1: 0;
+}