Fix clean blocks with dead context on debugger

[PalumboN]

Fix #13779

• A dead context is created for CleanBlocks in case it is not found in the stack
• Then small bugs appear -> check comment in sourceNodeForPC:
• I also doubt how BytecodeEncoder >> isCreateBlockAt:in: was resolved.

Related PR: pharo-spec/NewTools#605

[Ducasse]

Some unrelated tests are failing

[MarcusDenker]

the failing tests look somehow related, as they are about blocks (but in Sindarin)

unix-64 / Tests-unix-64 / testMoveToNodeWhenNodeIsInBlockThatCreatesContextAndBlockHasBeenCreated – Unix64.Sindarin.Tests.Base.SindarinDebuggerTest
unix-64 / Tests-unix-64 / testMoveToNodeWhenNodeIsInBlockThatCreatesContextAndBlockHasBeenCreatedBackward – Unix64.Sindarin.Tests.Base.SindarinDebuggerTest
unix-64 / Tests-unix-64 / testMoveToNodeWhenNodeIsNonInlinedAndEmbeddedInNonInlinedBlock – Unix64.Sindarin.Tests.Base.SindarinDebuggerTest

[jecisc]

tests passed!

[PalumboN]

Tests (Morphic) on OSX are crashing but I cannot reproduce it 👎

[jecisc]

This is a known issue that I hope will be workaround with: pharo-spec/Spec#1467

all tests passed here

[MarcusDenker]

Nice!

[MarcusDenker]

Falling back to the AST here is not that nice as it breaks the abstraction (the idea is that the bytecode level abstractions should be usable without the AST). But we could merge it for now and improve later, this is used only the the debugger which needs the AST anyway.