MonoSymbolFileException in CheckLineNumberTable

Mono.CompilerServices.SymbolWriter.MonoSymbolFileException: Exception of type 'Mono.CompilerServices.SymbolWriter.MonoSymbolFileException' was thrown.
at Mono.CompilerServices.SymbolWriter.MethodEntry.CheckLineNumberTable (Mono.CompilerServices.SymbolWriter.LineNumberEntry[] line_numbers) [0x00000] in <filename unknown>:0
at Mono.CompilerServices.SymbolWriter.MethodEntry..ctor (Mono.CompilerServices.SymbolWriter.MonoSymbolFile file, Mono.CompilerServices.SymbolWriter.CompileUnitEntry comp_unit, Int32 token, Mono.CompilerServices.SymbolWriter.ScopeVariable[] scope_vars, Mono.CompilerServices.SymbolWriter.LocalVariableEntry[] locals, Mono.CompilerServices.SymbolWriter.LineNumberEntry[] lines, Mono.CompilerServices.SymbolWriter.CodeBlockEntry[] code_blocks, System.String real_name, Flags flags, Int32 namespace_id) [0x00000] in <filename unknown>:0
at Mono.CompilerServices.SymbolWriter.SourceMethodBuilder.DefineMethod (Mono.CompilerServices.SymbolWriter.MonoSymbolFile file, Int32 token) [0x00000] in <filename unknown>:0
at Mono.CompilerServices.SymbolWriter.SourceMethodBuilder.DefineMethod (Mono.CompilerServices.SymbolWriter.MonoSymbolFile file) [0x00000] in <filename unknown>:0
at Mono.CompilerServices.SymbolWriter.MonoSymbolWriter.WriteSymbolFile (Guid guid) [0x00000] in <filename unknown>:0
at Mono.Cecil.Mdb.MdbWriter.Dispose () [0x00000] in <filename unknown>:0
at Mono.Cecil.ModuleWriter.Write (Mono.Cecil.ModuleDefinition module, Disposable`1 stream, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0
at Mono.Cecil.ModuleWriter.WriteModule (Mono.Cecil.ModuleDefinition module, Disposable`1 stream, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0
at Mono.Cecil.ModuleDefinition.Write (System.String fileName, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0
at Mono.Cecil.AssemblyDefinition.Write (System.String fileName, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0

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暖更新IL注入抛错, 但是只在Release编译上出现, Dev版本没问题. 看到是写Assembly时检查代码行出了错. 怀疑是部分代码导致的, 根据二分法, 不断定位出错的注入类型, 定位到一个类. 打开后发现有这样的函数:

bool XXX()

{

　　return false;

　　CodeLine....

}

看起来是这个函数的处理逻辑废弃了, 直接return 了false. 下面的代码行作废, 但是没有注释掉.

根据异常源自代码行校验, 判断是该函数的IL注入异常导致的写入Assembly错误. 

把return false后的CodeLine全部注释后, 果然没有了异常. 

结论: IL注入逻辑没有处理好这种特殊的代码. dev版本和release版本的编译在这种代码上有区别(可以打开IL确认)