Internal Error: System.NullReferenceException #5331
Labels
crash
Dafny crashes on this input, or generates malformed code that can not be executed
during 2: compilation of correct program
Dafny rejects a valid program during compilation
kind: bug
Crashes, unsoundness, incorrect output, etc. If possible, add a `part:` label
part: resolver
Resolution and typechecking
priority: next
Will consider working on this after in progress work is done
Dafny version
4.6.0 (nightly 4/17)
Code to produce this issue
Command to run and resulting output
What happened?
System.NullReferenceException: Object reference not set to an instance of an object.\n at Microsoft.Dafny.ConcreteSyntaxExpression.get_TerminalExpressions()+MoveNext()\n at System.Linq.Enumerable.All[TSource](IEnumerable
1 source, Func
2 predicate)\n at Microsoft.Dafny.ExpressionTester.CheckIsCompilable(Expression expr, ICodeContext codeContext, Boolean insideBranchesOnly)\n at Microsoft.Dafny.ModuleResolver.ResolveClassMembers_Pass1(TopLevelDeclWithMembers cl)\n at Microsoft.Dafny.ModuleResolver.ResolveTopLevelDecls_Core(List1 declarations, Graph
1 datatypeDependencies, Graph1 codatatypeDependencies, String moduleDescription, Boolean isAnExport)\n at Microsoft.Dafny.ModuleDefinition.Resolve(ModuleSignature sig, ModuleResolver resolver, String exportSetName)\n at Microsoft.Dafny.LiteralModuleDecl.Resolve(ModuleResolver resolver, CompilationData compilation)\n at Microsoft.Dafny.ModuleResolver.ResolveModuleDeclaration(CompilationData compilation, ModuleDecl decl)\n at Microsoft.Dafny.ProgramResolver.ResolveModuleDeclaration(CompilationData compilation, ModuleDecl decl)\n at Microsoft.Dafny.LanguageServer.Language.CachingResolver.ResolveModuleDeclaration(CompilationData compilation, ModuleDecl decl)\n at Microsoft.Dafny.ProgramResolver.Resolve(CancellationToken cancellationToken)\n at Microsoft.Dafny.LanguageServer.Language.CachingResolver.<>n__0(CancellationToken cancellationToken)\n at Microsoft.Dafny.LanguageServer.Language.CachingResolver.<>c__DisplayClass5_0.<Resolve>b__0()\n at Microsoft.Dafny.LanguageServer.Language.CacheExtensions.ProfileAndPruneCache[T,Key,Value](PruneIfNotUsedSinceLastPruneCache
2 cache, Func`1 useCache, TelemetryPublisherBase telemetryPublisher, String programName, String activity)\n at Microsoft.Dafny.LanguageServer.Language.CachingResolver.Resolve(CancellationToken cancellationToken)\n at Microsoft.Dafny.LanguageServer.Language.Symbols.DafnyLangSymbolResolver.RunDafnyResolver(Compilation compilation, Program program, CancellationToken cancellationToken)\n at Microsoft.Dafny.LanguageServer.Language.Symbols.DafnyLangSymbolResolver.ResolveSymbols(Compilation compilation, Program program, CancellationToken cancellationToken)\n at Microsoft.Dafny.TextDocumentLoader.ResolveInternal(Compilation compilation, Program program, CancellationToken cancellationToken)\n at Microsoft.Dafny.TextDocumentLoader.<>c__DisplayClass5_0.<b__0>d.MoveNext()\n--- End of stack trace from previous location ---\n at Microsoft.Dafny.TextDocumentLoader.ResolveAsync(Compilation compilation, Program program, CancellationToken cancellationToken)\n at Microsoft.Dafny.Compilation.ResolveAsync()","startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 2
}]
What type of operating system are you experiencing the problem on?
Mac
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