diff --git a/test/-ext-/debug/test_debug.rb b/test/-ext-/debug/test_debug.rb
index 3804714d0d..da66b1baf8 100644
--- a/test/-ext-/debug/test_debug.rb
+++ b/test/-ext-/debug/test_debug.rb
@@ -56,4 +56,20 @@ class TestDebug < Test::Unit::TestCase
     binds = inspector_in_eval
     binds_check binds, bug7635
   end
+
+  class MyRelation 
+    include Enumerable 
+ 
+    def each
+      yield :each_entry
+    end 
+   end 
+ 
+  def test_lazy_block
+    x = MyRelation.new.any? do
+      Bug::Debug.inspector
+      true
+    end 
+    assert_equal true, x, '[Bug #15105]'
+  end
 end
diff --git a/vm_backtrace.c b/vm_backtrace.c
index 59340292cf..0493ed8c89 100644
--- a/vm_backtrace.c
+++ b/vm_backtrace.c
@@ -1202,6 +1202,9 @@ rb_debug_inspector_open(rb_debug_inspector_func_t func, void *data)
     enum ruby_tag_type state;
     volatile VALUE MAYBE_UNUSED(result);
 
+    /* escape all env to heap */
+    rb_vm_stack_to_heap(ec);
+
     dbg_context.ec = ec;
     dbg_context.cfp = dbg_context.ec->cfp;
     dbg_context.backtrace = ec_backtrace_location_ary(ec, 0, 0);