Crash occurs when taking low or high byte of immediate forward label inside macro.

[Dart-Matter]

Encountered this while porting asm code.

Assembling the following with a default setup

!macro mactest
    lda #<+
+   rts    
!end

results in:

An error occurred during building an element
System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at RetroDevStudio.Parser.ASMFileParser.EvaluateTokens(Int32 LineIndex, List`1 Tokens, Int32 StartIndex, Int32 Count, Map`2 TextCodeMapping, SymbolInfo& ResultingToken, Int32& NumBytesGiven) in D:\projekte\C64Studio\C64Models\Parser\ASMFileParser.cs:line 1635
   at RetroDevStudio.Parser.ASMFileParser.EvaluateTokens(Int32 LineIndex, List`1 Tokens, Int32 StartIndex, Int32 Count, Map`2 TextCodeMapping, SymbolInfo& ResultingToken, Int32& NumBytesGiven) in D:\projekte\C64Studio\C64Models\Parser\ASMFileParser.cs:line 1999
   at RetroDevStudio.Parser.ASMFileParser.EstimateOpcode(Int32 LineIndex, List`1 LineTokens, List`1 PossibleOpcodes, LineInfo& info, List`1& OpcodeExpressions, UInt64& ResultingOpcodePatchValue, Boolean& HadError) in D:\projekte\C64Studio\C64Models\Parser\ASMFileParser.cs:line 12704
   at RetroDevStudio.Parser.ASMFileParser.PreProcess(String[] Lines, String ParentFilename, ProjectConfig Configuration, String AdditionalPredefines, Boolean& HadFatalError) in D:\projekte\C64Studio\C64Models\Parser\ASMFileParser.cs:line 5520
   at RetroDevStudio.Parser.ASMFileParser.Parse(String Content, ProjectConfig Configuration, CompileConfig Config, String AdditionalPredefines, FileInfo& ASMFileInfo) in D:\projekte\C64Studio\C64Models\Parser\ASMFileParser.cs:line 10628
   at RetroDevStudio.MainForm.ParseFile(ParserBase Parser, DocumentInfo Document, ProjectConfig Configuration, String AdditionalPredefines, Boolean OutputMessages, Boolean CreatePreProcessedFile, Boolean CreateRelocationFile, FileInfo& ASMFileInfo) in D:\projekte\C64Studio\C64Studio\MainForm.cs:line 5807
   at RetroDevStudio.Tasks.TaskCompile.BuildElement(DocumentInfo Doc, String ConfigSetting, String AdditionalPredefines, Boolean OutputMessages, SingleBuildInfo& BuildInfo, FileInfo& FileInfo) in D:\projekte\C64Studio\C64Studio\Tasks\TaskCompile.cs:line 820

[GeorgRottensteiner]

Nice catch!

Fixed with commit 405cb6aea11770fc7269bac3afccd12fc9113442, uploaded WIP version at https://www.georg-rottensteiner.de/webmisc/C64StudioRelease.zip

[Dart-Matter]

Verified.