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eb2d1cdd1b
Updates #30228 Updates #28387 Change-Id: Iad7d960b70221f90ccc2372bb1d4d41cec3926e4 Reviewed-on: https://go-review.googlesource.com/c/163214 Run-TryBot: Bryan C. Mills <bcmills@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
32 lines
1.1 KiB
Go
32 lines
1.1 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// The bug happened like this:
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// 1) The main binary adds an itab for *json.UnsupportedValueError / error
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// (concrete type / interface type). This itab goes in hash bucket 0x111.
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// 2) The plugin adds that same itab again. That makes a cycle in the itab
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// chain rooted at hash bucket 0x111.
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// 3) The main binary then asks for the itab for *dynamodbstreamsevt.Event /
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// json.Unmarshaler. This itab happens to also live in bucket 0x111.
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// The lookup code goes into an infinite loop searching for this itab.
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// The code is carefully crafted so that the two itabs are both from the
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// same bucket, and so that the second itab doesn't exist in
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// the itab hashmap yet (so the entire linked list must be searched).
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package main
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import (
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"encoding/json"
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"plugin"
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"testplugin/issue18676/dynamodbstreamsevt"
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)
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func main() {
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plugin.Open("plugin.so")
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var x interface{} = (*dynamodbstreamsevt.Event)(nil)
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if _, ok := x.(json.Unmarshaler); !ok {
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println("something")
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}
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}
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