gc: disallow invalid map keys

The algtype-based test broke when algtype
got a bit more fine-grained, so replace with
an explicit check for the invalid key types.

R=ken2
CC=golang-dev
https://golang.org/cl/5071041

1 files changed, 41 insertions, 0 deletions

diff --git a/test/map1.go b/test/map1.go
new file mode 100644
index 0000000000..3a56cf057d
--- /dev/null
+++ b/test/map1.go
@@ -0,0 +1,41 @@
+// errchk $G -e $D/$F.go
+
+// Copyright 2011 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.
+
+package main
+
+func main() {}
+
+type v bool
+
+var (
+	// valid
+	_ map[int8]v 
+	_ map[uint8]v 
+	_ map[int16]v 
+	_ map[uint16]v 
+	_ map[int32]v 
+	_ map[uint32]v 
+	_ map[int64]v 
+	_ map[uint64]v 
+	_ map[int]v 
+	_ map[uint]v 
+	_ map[uintptr]v
+	_ map[float32]v
+	_ map[float64]v
+	_ map[complex64]v
+	_ map[complex128]v
+	_ map[bool]v
+	_ map[string]v
+	_ map[chan int]v
+	_ map[func()]v
+	_ map[*int]v
+	_ map[map[int]int]v
+
+	// invalid
+	_ map[struct{}]v // ERROR "invalid map key"
+	_ map[[]int]v  // ERROR "invalid map key"
+	_ map[[10]int]v // ERROR "invalid map key"
+)