Don't make a new block after end of iseq

1 files changed, 5 insertions, 1 deletions

diff --git a/zjit/src/ir.rs b/zjit/src/ir.rs
index cd58fc6ab8..a31e3f42a5 100644
--- a/zjit/src/ir.rs
+++ b/zjit/src/ir.rs
@@ -284,7 +284,11 @@ fn compute_jump_targets(iseq: *const rb_iseq_t) -> Vec<u32> {
                 let offset = get_arg(pc, 0).as_i64();
                 jump_targets.insert(insn_idx_at_offset(insn_idx, offset));
             }
-            YARVINSN_leave => { jump_targets.insert(insn_idx); }
+            YARVINSN_leave => {
+                if insn_idx < iseq_size {
+                    jump_targets.insert(insn_idx);
+                }
+            }
             _ => eprintln!("zjit: compute_jump_targets: unknown opcode `{}'", insn_name(opcode as usize)),
         }
     }