From d9fc1929e9716ac20ec0f9fc42df802f850384db Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Sun, 4 Feb 2018 19:15:18 -0800 Subject: [PATCH] test: add test for rounding to positive zero Per the language spec clarification in https://golang.org/cl/14727. Updates #12576 Updates #12621 Change-Id: I1e459c3c11a571bd29582761faacaa9ca3178ba6 Reviewed-on: https://go-review.googlesource.com/91895 Run-TryBot: Ian Lance Taylor Run-TryBot: Robert Griesemer Reviewed-by: Robert Griesemer TryBot-Result: Gobot Gobot --- test/fixedbugs/issue12621.go | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 test/fixedbugs/issue12621.go diff --git a/test/fixedbugs/issue12621.go b/test/fixedbugs/issue12621.go new file mode 100644 index 0000000000..379a362d73 --- /dev/null +++ b/test/fixedbugs/issue12621.go @@ -0,0 +1,20 @@ +// 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) + } +} -- 2.50.0