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Void[] breaks the parser before even invoking anything #5120
Description
Prerequisites
- Write a descriptive title.
- Make sure you are able to repro it on the latest released version
- Search the existing issues, especially the pinned issues.
Exception report
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Please report on GitHub: https://github.com/PowerShell/PSReadLine/issues/new?template=Bug_Report.yaml
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### Environment
PSReadLine: 2.4.5
PowerShell: 7.6.0
OS: Microsoft Windows 10.0.26220
BufferWidth: 291
BufferHeight: 80
Last 7 Keys:
[ v o i d [ ]
### Exception
System.TypeLoadException: Could not create array type 'System.Void[]' from assembly 'System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' because the element type is System.Void.
at System.RuntimeTypeHandle.MakeSZArray()
at System.RuntimeType.MakeArrayType()
at System.Management.Automation.Language.ArrayTypeName.GetReflectionType()
at System.Management.Automation.Language.SymbolResolver.VisitArrayTypeName(ArrayTypeName arrayTypeName)
at System.Management.Automation.Language.SymbolResolver.VisitTypeExpression(TypeExpressionAst typeExpressionAst)
at System.Management.Automation.Language.TypeExpressionAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.CommandExpressionAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.PipelineAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.StatementBlockAst.InternalVisit(AstVisitor visitor, ReadOnlyCollection`1 traps, ReadOnlyCollection`1 statements, AstVisitAction action)
at System.Management.Automation.Language.NamedBlockAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.ScriptBlockAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(AstVisitor astVisitor)
at System.Management.Automation.Language.SymbolResolver.ResolveSymbols(Parser parser, ScriptBlockAst scriptBlockAst)
at System.Management.Automation.Language.ScriptBlockAst.PerformPostParseChecks(Parser parser)
at System.Management.Automation.Language.Parser.ParseTask(String fileName, String input, List`1 tokenList, Boolean recursed, ParseMode parseMode)
at System.Management.Automation.Language.Parser.ParseInput(String input, String fileName, Token[]& tokens, ParseError[]& errors)Screenshot
Environment data
PS Version: 7.6.0
PS HostName: ConsoleHost (Windows Terminal)
PSReadLine Version: 2.4.5
PSReadLine EditMode: Windows
OS: 10.0.26100.7934 (WinBuild.160101.0800)
BufferWidth: 291
BufferHeight: 80Steps to reproduce
First: Yes, Void[] is an illegal type in .net, since void can't be an array member.
However, it seems the parser is unable to gracefully handle it, in some cases (such as the above sequence).
It fails every time if entered as above, and in several other permutations I tried, such as using arrow keys to go back and edit the brackets in...But only in certain cases.
However, it also behaves slightly differently if there is already something else in the history buffer, AND it loses part of the key buffer in those cases, making the report misleading if taken directly. I played around with it a bit to try to suss out the specifics, but then figured that is probably pointless, since solving the root problem will almost definitely solve those cases at the same time, so gave up on that.
Expected behavior
Shouldn't die so quickly like this. Should be more graceful and not until invocation.
Actual behavior
Dies immediately on the keypress that completes the void[] type name.