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// run
// Copyright 2018 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.
// Issues 12576 and 12621: Negative untyped floating point constants
// with small magnitude round to 0, not negative zero.
package main
import "math"
var m = -1e-10000
func main() {
if math.Signbit(m) {
panic(m)
}
}
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