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579c69ac1c
Raising an out-of-bounds panic is confusing. There's no indication that the underlying problem is a race. The runtime already does a pretty good job of detecting this kind of race (modification while iterating). We might as well just reorganize a bit to avoid the out-of-bounds panic. Fixes #33275 Change-Id: Icdd337ad2eb3c84f999db0850ec1d2ff2c146b6e Reviewed-on: https://go-review.googlesource.com/c/go/+/191197 Reviewed-by: Martin Möhrmann <moehrmann@google.com>
26 lines
691 B
Go
26 lines
691 B
Go
// +build !nacl,!js
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// run
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// Copyright 2019 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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// Make sure we don't get an index out of bounds error
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// while trying to print a map that is concurrently modified.
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// The runtime might complain (throw) if it detects the modification,
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// so we have to run the test as a subprocess.
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package main
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import (
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"os/exec"
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"strings"
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)
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func main() {
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out, _ := exec.Command("go", "run", "fixedbugs/issue33275.go").CombinedOutput()
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if strings.Contains(string(out), "index out of range") {
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panic(`go run issue33275.go reported "index out of range"`)
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}
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}
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