1 files changed, 52 insertions, 0 deletions
diff --git a/test/fixedbugs/issue4813.go b/test/fixedbugs/issue4813.go
new file mode 100644
index 000000000..0ca9d3f72
--- /dev/null
+++ b/test/fixedbugs/issue4813.go
@@ -0,0 +1,52 @@
+// errorcheck
+
+// Copyright 2013 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 4813: use of constant floats as indices.
+
+package main
+
+var A [3]int
+var S []int
+var T string
+
+const (
+	i  = 1
+	f  = 2.0
+	f2 = 2.1
+	c  = complex(2, 0)
+	c2 = complex(2, 1)
+)
+
+var (
+	vf = f
+	vc = c
+)
+
+var (
+	a1 = A[i]
+	a2 = A[f]
+	a3 = A[f2] // ERROR "truncated"
+	a4 = A[c]
+	a5 = A[c2] // ERROR "truncated"
+	a6 = A[vf] // ERROR "non-integer"
+	a7 = A[vc] // ERROR "non-integer"
+
+	s1 = S[i]
+	s2 = S[f]
+	s3 = S[f2] // ERROR "truncated"
+	s4 = S[c]
+	s5 = S[c2] // ERROR "truncated"
+	s6 = S[vf] // ERROR "non-integer"
+	s7 = S[vc] // ERROR "non-integer"
+
+	t1 = T[i]
+	t2 = T[f]
+	t3 = T[f2] // ERROR "truncated"
+	t4 = T[c]
+	t5 = T[c2] // ERROR "truncated"
+	t6 = T[vf] // ERROR "non-integer"
+	t7 = T[vc] // ERROR "non-integer"
+)