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Double.Parse throws AccessViolationException on .NET Core 3.0 #28872

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dotnet/coreclr
#23043
dotnet/coreclr#23043
Closed
Double.Parse throws AccessViolationException on .NET Core 3.0#28872
dotnet/coreclr
#23043
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bug
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3.0

Description

@Metalnem
Metalnem
opened on Mar 5, 2019
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Double.Parse sometimes throws AccessViolationException on .NET Core 3.0. Here's the snippet you can use to reproduce this:

Double.Parse("0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000");

The stack trace:

System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at System.Number+BigInteger.CountSignificantBits(BigInteger ByRef)
   at System.Number.NumberToFloatingPointBitsSlow(NumberBuffer ByRef, FloatingPointInfo ByRef, UInt32, UInt32, UInt32)
   at System.Number.NumberToFloatingPointBits(NumberBuffer ByRef, FloatingPointInfo ByRef)
   at System.Number.NumberToDouble(NumberBuffer ByRef)
   at System.Number.TryParseDouble(System.ReadOnlySpan`1<Char>, System.Globalization.NumberStyles, System.Globalization.NumberFormatInfo, Double ByRef)
   at System.Double.Parse(System.String)

I'm using the latest .NET Core 3.0 daily build:

.NET Core SDK (reflecting any global.json):
 Version:   3.0.100-preview4-010607
 Commit:    ccd2f7cfaa

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.14
 OS Platform: Darwin
 RID:         osx.10.14-x64
 Base Path:   /Users/Metalnem/Temp/dotnet-sdk-latest-osx-x64/sdk/3.0.100-preview4-010607/

Found via SharpFuzz.

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