From f5b8813e93f3d61556ecc0ba112478fa319e4e30 Mon Sep 17 00:00:00 2001 From: Chris Manghane Date: Tue, 20 Jan 2015 14:35:33 -0800 Subject: [PATCH] cmd/gc: don't unpack struct arguments to append Fixes #9634. Change-Id: I7b18f26c2fb812978fc7adc5bfd39ebfffe48701 Reviewed-on: https://go-review.googlesource.com/3080 Reviewed-by: Minux Ma --- src/cmd/gc/typecheck.c | 2 +- test/fixedbugs/issue9634.go | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) create mode 100644 test/fixedbugs/issue9634.go diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c index 8a3b486bd66..1abdb83c588 100644 --- a/src/cmd/gc/typecheck.c +++ b/src/cmd/gc/typecheck.c @@ -1346,7 +1346,7 @@ reswitch: goto error; // Unpack multiple-return result before type-checking. - if(istype(t, TSTRUCT)) { + if(istype(t, TSTRUCT) && t->funarg) { t = t->type; if(istype(t, TFIELD)) t = t->type; diff --git a/test/fixedbugs/issue9634.go b/test/fixedbugs/issue9634.go new file mode 100644 index 00000000000..2d5aae4a30e --- /dev/null +++ b/test/fixedbugs/issue9634.go @@ -0,0 +1,18 @@ +// errorcheck + +// Copyright 2015 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 9634: Structs are incorrectly unpacked when passed as an argument +// to append. + +package main + +func main() { + s := struct{ + t []int + u int + }{} + _ = append(s, 0) // ERROR "must be a slice|must be slice" +}