A bug in singlepass mode

[erxiaozhou]

Bug Report

1. Minimal reproduce step (Required)

(module
  (type (;0;) (func))
  (func (;0;) (type 0)
    i32.const -2097153
    i64.const 0
    i64.store16 offset=1257956348 align=1)
  (memory (;0;) 32769)
  (export "to_test" (func 0)))

1. Transform the WAT to WASM
2. Use the singlepass mode to execute it

dtvm -m singlepass  -f to_test <test_case>

2. What did you expect to see? (Required)

There is a memory OOB.

3. What did you see instead (Required)

No Exception

4. What is the version of this project you are using? (Required)

78a5573