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[VS2019] Build Failure: syntax error at token 'inf'

See original GitHub issue

This is with the latest VS2019 version 16.4. Build log:

1>E:\Users\Administrator\git\GMMatchvs\packages\DllExport.1.6.5\tools\net.r_eg.DllExport.targets(59,5): error : C:\Users\Administrator\AppData\Local\Temp\tmp3792\GMMatchvs.x86.il(182) : error : syntax error at token 'inf' in:   .field public static literal float32 'Infinity' = float32(inf)
1>E:\Users\Administrator\git\GMMatchvs\packages\DllExport.1.6.5\tools\net.r_eg.DllExport.targets(59,5): error : 
1>     在 RGiesecke.DllExport.Parsing.IlParser.RunIlTool(String installPath, String toolFileName, String requiredPaths, String workingDirectory, String settingsName, String arguments, String toolLoggingCode, String verboseLoggingCode, IDllExportNotifier notifier, Int32 timeout, Func`2 suppressErrorOutputLine) 位置 C:\projects\dllexport\RGiesecke.DllExport\Parsing\IlParser.cs:行号 368
1>     在 RGiesecke.DllExport.Parsing.IlAsm.RunCore(CpuPlatform cpu, String fileName, String ressourceParam, String ilSuffix) 位置 C:\projects\dllexport\RGiesecke.DllExport\Parsing\ILAsm.cs:行号 143
1>     在 RGiesecke.DllExport.Parsing.IlAsm.Run(String outputFile, String ilSuffix, CpuPlatform cpu) 位置 C:\projects\dllexport\RGiesecke.DllExport\Parsing\ILAsm.cs:行号 113
1>     在 RGiesecke.DllExport.Parsing.IlAsm.ReassembleFile(String outputFile, String ilSuffix, CpuPlatform cpu) 位置 C:\projects\dllexport\RGiesecke.DllExport\Parsing\ILAsm.cs:行号 52
1>     在 RGiesecke.DllExport.DllExportWeaver.reassembleFile(IlAsm ilAsm, String outputFile, String ilSuffix, CpuPlatform cpu) 位置 C:\projects\dllexport\RGiesecke.DllExport\DllExportWeaver.cs:行号 198
1>     在 RGiesecke.DllExport.DllExportWeaver.RunIlAsm(IlAsm ilAsm) 位置 C:\projects\dllexport\RGiesecke.DllExport\DllExportWeaver.cs:行号 163
1>     在 RGiesecke.DllExport.DllExportWeaver.Run() 位置 C:\projects\dllexport\RGiesecke.DllExport\DllExportWeaver.cs:行号 89
1>     在 RGiesecke.DllExport.MSBuild.ExportTaskImplementation`1.Execute() 位置 C:\projects\dllexport\RGiesecke.DllExport.MSBuild\RGiesecke.DllExport.MSBuild\ExportTaskImplementation.cs:行号 463

Maybe this is what happened: syntax error at token 'inf' in: .field public static literal float32 'Infinity' = float32(inf).

The problematic il snippet:

...
// =============== CLASS MEMBERS DECLARATION ===================

.class public sequential ansi sealed beforefieldinit 'Mathf'
       extends ['mscorlib']'System'.'ValueType'
{
  .pack 0
  .size 1
  .field public static literal float32 'PI' = float32(3.141593)
  .field public static literal float32 'Infinity' = float32(inf)
  .field public static literal float32 'NegativeInfinity' = float32(-inf)
  .field public static literal float32 'Deg2Rad' = float32(1.7453291e-02)
  .field public static literal float32 'Rad2Deg' = float32(57.29578)
  .method public hidebysig static float32 
          'Sin'(float32 'f') cil managed
  {
    // 代码大小       9 (0x9)
    .maxstack  8
    IL_0000:  ldarg.0
    IL_0001:  conv.r8
    IL_0002:  call       float64 ['mscorlib']'System'.'Math'::'Sin'(float64)
    IL_0007:  conv.r4
    IL_0008:  ret
  } // end of method 'Mathf'::'Sin'
...

Any ideas?