Decimal constant causes `System.InvalidProgramException` for debug builds

[esbenbjerre]

Repro steps

Compile and run this with dotnet run

module A =
  [<Literal>]
  let B = 42m

[<EntryPoint>]
let main args =
  0

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net9.0</TargetFramework>
    <AssemblyName>Test</AssemblyName>
  </PropertyGroup>
  <ItemGroup>
    <Compile Include="Program.fs" />
  </ItemGroup>
</Project>

results in

Unhandled exception. System.InvalidProgramException: Common Language Runtime detected an invalid program.
   at <StartupCode$Test>.$Program..cctor()
   at Program.main(String[] args) in .../Program.fs:line 7

Note that it works in release mode with dotnet run -c Release.

Comparing the generated IR between debug and release of $Program::.cctor shows
Debug

.method private specialname rtspecialname static 
void .cctor () cil managed 
{
  // Method begins at RVA 0x2070
  // Header size: 12
  // Code size: 17 (0x11)
  .maxstack 2
  .locals init (
    [0] valuetype [System.Runtime]System.Decimal
  )
  ...
}

Release

.method private specialname rtspecialname static 
void .cctor () cil managed 
{
  // Method begins at RVA 0x2070
  // Header size: 1
  // Code size: 17 (0x11)
  .maxstack 8
  ...
}

Expected behavior

Should not throw exception.

Actual behavior

Throws exception.

Known workarounds

Remove [<Literal>] attribute or use release build.

Related information

Provide any related information (optional):

Reproduces on 9.0.200, 9.0.301, 9.0.303, 9.0.305, 10.0.100-rc.

[esbenbjerre]

I'm the author of the feature but it's been a while since I looked at compiler code and IR.