cmd/gc: fewer errors for wrong argument count

Fixes issue 7675

LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/85040044

Committer: Russ Cox <rsc@golang.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/test/fixedbugs/issue7675.go b/test/fixedbugs/issue7675.go
new file mode 100644
index 000000000..d97ee357a
--- /dev/null
+++ b/test/fixedbugs/issue7675.go
@@ -0,0 +1,24 @@
+// errorcheck
+
+// Copyright 2014 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 7675: fewer errors for wrong argument count
+
+package p
+
+func f(string, int, float64, string)
+
+func g(string, int, float64, ...string)
+
+func main() {
+	f(1, 0.5, "hello") // ERROR "not enough arguments"
+	f("1", 2, 3.1, "4")
+	f(1, 0.5, "hello", 4, 5) // ERROR "too many arguments"
+	g(1, 0.5)                // ERROR "not enough arguments"
+	g("1", 2, 3.1)
+	g(1, 0.5, []int{3, 4}...) // ERROR "not enough arguments"
+	g("1", 2, 3.1, "4", "5")
+	g(1, 0.5, "hello", 4, []int{5, 6}...) // ERROR "too many arguments"
+}