System.ExecutionEngineException occurred in Unknown Module (Fatal error. Internal CLR error. (0x80131506))

[cschuchardt88]

Description

When debugging (stepping over) from managed code to unsafe code, then clicking continue in Visual Studio 2022. The application you are debugging crashes dotnet. Ends up hanging dotnet application when you resume it when debugger is attached.

Reproduction Steps

1. Add breakpoint on line: 4 in Visual Studio 2022.
2. When breakpoint is hit. Then Step over breakpoint.
3. Then continue the application.
4. Now process should be hanging.

Expected behavior

Not to hang or crash.

Actual behavior

Application

Visual Studio

Regression?

No response

Known Workarounds

No response

Configuration

Code

int max = int.MaxValue;
int min = int.MinValue;
int value1 = min * -1;
int value2 = max + 1;
long value3 = value2; // Add break point here, then step over this point.

unsafe
{
    int* maxPtr = &max;
    int* minPtr = &min;
    int* valuePtr1 = &value1;
    int* valuePtr2 = &value2;

    Console.WriteLine($"int.MinValue = {min}           // Pointer: 0x{(ulong)minPtr:x}");
    Console.WriteLine($"int.MaxValue = {max}            // Pointer: 0x{(ulong)maxPtr:x}");
    Console.WriteLine($"int value1 = {value1}             // Pointer: 0x{(ulong)valuePtr1:x}");
    Console.WriteLine($"int value2 = {value2}             // Pointer: 0x{(ulong)valuePtr2:x}");
    Console.WriteLine($"{min} * -1 = {max}        // Does it equal '{max}'? Result: {value1 == max}");
    Console.WriteLine($"{value1} == {value2}           // Does 'value1' equal 'value2'? Result: {value1 == value2}");
}

*.csproj File

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net9.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

</Project>

Other information

No response

[hoyosjs]

I can't repro this on Windows x64 using runtime version 9.0.1 or 9.0.0. If this still repros - can you please share a crash dump on https://developercommunity.visualstudio.com/home and share back the issue link here please? I tried stepping line by line, stepping in, or just a single step and then continue - I was unable to repro.

[cschuchardt88]

Here you go https://developercommunity.visualstudio.com/t/SystemExecutionEngineException-occurred/10844425

You can try putting a breakpoint within unsafe on one of the int* lines. Than run to that breakpoint. Try Step Into.