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go/test/fixedbugs/issue20233.go
Josh Bleecher Snyder f2c5f57a87 cmd/compile: prevent panic while formatting func(...T) with unknown T
Compile:

package p

var f = func(...A)


Before this CL:

x.go:3:13: type %!v(PANIC=runtime error: invalid memory address or nil pointer dereference) is not an expression
x.go:3:17: undefined: A


After this CL:

x.go:3:13: type func(...<T>) is not an expression
x.go:3:17: undefined: A


Found with go-fuzz.

Fixes #20233

Change-Id: Ibb232b3954c4091071440eba48b44c4022a8083f
Reviewed-on: https://go-review.googlesource.com/42610
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-05-04 00:37:17 +00:00

12 lines
332 B
Go

// errorcheck
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Issue 20233: panic while formatting an error message
package p
var f = func(...A) // ERROR "type func(....*) is not an expression" ERROR "undefined: A"