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floating point bug
R=rsc DELTA=35 (35 added, 0 deleted, 0 changed) OCL=29442 CL=29444
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32
test/bugs/bug154.go
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32
test/bugs/bug154.go
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@ -0,0 +1,32 @@
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// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG: should not panic
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "fmt"
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func f0() string {
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const f = 3.141592;
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return fmt.Sprintf("%v", float64(f));
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}
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func f1() string {
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const f = 3.141592;
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_ := float64(float32(f)); // appears to change the precision of f
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return fmt.Sprintf("%v", float64(f));
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}
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func main() {
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r0 := f0();
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r1 := f1();
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if r0 != r1 {
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println("r0 =", r0);
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println("r1 =", r1);
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panic("r0 and r1 should be the same");
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}
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}
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@ -112,6 +112,13 @@ BUG: should compile
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BUG: errchk: bugs/bug153.go:9: error message does not match 'nil'
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bugs/bug153.go:9: fatal error: dowidth: unknown type: E-34
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=========== bugs/bug154.go
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r0 = 3.141592
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r1 = 3.141592025756836
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r0 and r1 should be the same
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panic PC=xxx
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BUG: should not panic
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=========== fixedbugs/bug016.go
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fixedbugs/bug016.go:7: constant -3 overflows uint
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