load: 'bootstrap/stream.slate'. bug

[Lendvai Attila]

hi!
 
so here is what i could find out up till now:
 
it stops at this line in streams.slate:
 
FilterStream addSlot: #block valued: [| :_ | True].

but not in a consistent way. always bombs the debugger for the first time evaluating the entire file, but later it works sometimes. somehow it depends on the evaluation of stuff before the line in question.
 
here is an intresting stackframe with 8 parameters?! that comes from the code block below:
 
parser parseAtom: _@(Syntax BeginBlockToken traits)
[
  parser parseBlock: (Syntax Block newEmpty readFrom: parser)
].
 
Debug [0..2]: 0
Select a stack frame [0..]: 6
[parseBlock:]
0: ("Parser" Condition: ("Condition" handlers: {"ExtensibleArray"}. exitContinuation: []. s
                traits: ("Condition" ...)). Exhaustion: ("Exhaustion" handlers: {"Extensibl
                returnContinuation: []. traits: ("Exhaustion" ...)). lookAheadBuffer: {"Ext
                Any . Union . Type . Clone .
                Intersection . Singleton . Array . traits .
                None . Not . Member . Range .
                Block ). lexer: ("Lexer" Condition: ("Condition" ...). Exhaustion: ("Exhaus
                lineNumber: 597. stream: ("ReadStream" ...). Error: ("Error" ...). traits:
        currentScope: ("Block" localVariables: {...}. parentScope: ("Namespace" ...). optio
                optionalVariables: {}. type: ("Any" ...). restVariable: Nil. lineNumber: 59
                inputVariables: {...}. traits: ("Block" ...)). Error: ("Error" handlers: {"
                lineNumber: 0. returnContinuation: []. description: 'Undescribed condition'
        traits: ("Parser" traits: ("Traits" ...). printName: 'Parser'. parent0: ("ReadStrea
1: ("Block" localVariables: {("Variable" ...)}. parentScope: ("Namespace" type: ("Any" ...)
                traits: ("Namespace" ...)). optionalKeywords: {}. statements: {}. optionalV
        type: ("Any" rules: <"Unprintable">. traits: ("Any" ...)). restVariable: Nil. lineN
        inputVariables: {("Variable" ...)}. traits: ("Block" traits: ("Traits" ...). printN
2: ("BeginVariablesToken" traits: ("BeginVariablesToken" traits: ("Traits" ...). printName:
3: Nil
4: 597
5: ("WriteStream" Condition: ("Condition" handlers: {"ExtensibleArray"}. exitContinuation:
                traits: ("Condition" ...)). Exhaustion: ("Exhaustion" handlers: {"Extensibl
                returnContinuation: []. traits: ("Exhaustion" ...)). collection: {("Variabl
                Nil. Nil. Nil. Nil.
                Nil. Nil. Nil. Nil.
                Nil. Nil. Nil. Nil.
                Nil. Nil. ...}.. position: 1.
        writeLimit: 20. readLimit: 1. traits: ("WriteStream" parent0: ("Stream" ...). paren
                printName: 'WriteStream'. traits: ("Traits" ...)))
6: ("WriteStream" Condition: ("Condition" handlers: {"ExtensibleArray"}. exitContinuation:
                traits: ("Condition" ...)). Exhaustion: ("Exhaustion" handlers: {"Extensibl
                returnContinuation: []. traits: ("Exhaustion" ...)). collection: {}. positi
        writeLimit: 0. readLimit: 0. traits: ("WriteStream" parent0: ("Stream" ...). parent
                printName: 'WriteStream'. traits: ("Traits" ...)))
7: ("WriteStream" Condition: ("Condition" handlers: {"ExtensibleArray"}. exitContinuation:
                traits: ("Condition" ...)). Exhaustion: ("Exhaustion" handlers: {"Extensibl
                returnContinuation: []. traits: ("Exhaustion" ...)). collection: {}. positi
        writeLimit: 0. readLimit: 0. traits: ("WriteStream" parent0: ("Stream" ...). parent
                printName: 'WriteStream'. traits: ("Traits" ...)))
The following condition was signaled:
The method #block: was not found for the following arguments:
{("FilterStream" Condition: ("Condition" ...). Exhaustion: ("Exhaustion" ...). source: ("Re
        []}

first two is ok, but the rest?
 
that's all i can gather now.
 
hope it helps,
 
- 101