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BigInteger.TryParse out-of-bounds access · Issue #28652 · dotnet/runtime · GitHub
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Description
BigInteger.TryParse overloads accepting ReadOnlySpan<char> are ignoring the length of the span, and are reading beyond its end if there are more digits available. Here's the program to reproduce this:
using System;
using System.Numerics;
namespace BigInt
{
public class Program
{
public static void Main(string[] args)
{
var s = "123456789";
var span = s.AsSpan(0, 1);
if (BigInteger.TryParse(span, out var result))
{
Console.WriteLine(result);
}
}
}
}
This program should be printing 1, but it's printing 123456789 instead. My running environment looks like this:
.NET Core SDK (reflecting any global.json):
Version: 2.2.103
Commit: 8edbc2570a
Runtime Environment:
OS Name: Mac OS X
OS Version: 10.14
OS Platform: Darwin
RID: osx.10.14-x64
Base Path: /usr/local/share/dotnet/sdk/2.2.103/
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