Unhandled exception: No class info for DBusSignature

[szekelyisz]

I keep getting this error on the debugging console in Android Studio:

Unhandled exception:
file:///home/szabi/.pub-cache/hosted/pub.dartlang.org/dbus-0.7.4/lib/src/dbus_value.dart: No class info for DBusSignature
#0      ClosedWorldClassHierarchy.infoFor (package:kernel/class_hierarchy.dart:516:7)
#1      ClosedWorldClassHierarchy.getInterfaceMembers (package:kernel/class_hierarchy.dart:827:43)
#2      ClosedWorldClassHierarchy.getInterfaceMember (package:kernel/class_hierarchy.dart:821:25)
#3      TypeInferrerImpl._computeAssignabilityKind (package:front_end/src/fasta/type_inference/type_inferrer.dart:807:26)
#4      TypeInferrerImpl.ensureAssignableResult (package:front_end/src/fasta/type_inference/type_inferrer.dart:582:47)
#5      TypeInferrerImpl.ensureAssignable (package:front_end/src/fasta/type_inference/type_inferrer.dart:509:12)
#6      TypeInferrerImpl._inferInvocation (package:front_end/src/fasta/type_inference/type_inferrer.dart:2649:24)
#7      TypeInferrerImpl.inferInvocation (package:front_end/src/fasta/type_inference/type_inferrer.dart:2155:12)
#8      InferenceVisitor.visitConstructorInvocation (package:front_end/src/fasta/kernel/inference_visitor.dart:700:49)
#9      ConstructorInvocation.accept1 (package:kernel/ast.dart:6383:9)
#10     TypeInferrerImpl._inferExpression (package:front_end/src/fasta/type_inference/type_inferrer.dart:2032:27)
#11     TypeInferrerImpl.inferNullAwareExpression (package:front_end/src/fasta/type_inference/type_inferrer.dart:2076:40)
#12     InferenceVisitor.visitMethodInvocation (package:front_end/src/fasta/kernel/inference_visitor.dart:2904:49)
#13     MethodInvocation.acceptInference (package:front_end/src/fasta/kernel/internal_ast.dart:4644:20)
#14     TypeInferrerImpl._inferExpression (package:front_end/src/fasta/type_inference/type_inferrer.dart:2030:27)
#15     TypeInferrerImpl.inferExpression (package:front_end/src/fasta/type_inference/type_inferrer.dart:2067:40)
#16     InferenceVisitor.visitReturnStatement (package:front_end/src/fasta/kernel/inference_visitor.dart:5947:61)
#17     ReturnStatement.accept (package:kernel/ast.dart:9864:43)
#18     TypeInferrerImpl.inferStatement (package:front_end/src/fasta/type_inference/type_inferrer.dart:4115:24)
#19     TypeInferrerImpl.inferFunctionBody (package:front_end/src/fasta/type_inference/type_inferrer.dart:2112:39)
#20     BodyBuilder.parseSingleExpression (package:front_end/src/fasta/kernel/body_builder.dart:1757:62)
#21     SourceLoader.buildExpression (package:front_end/src/fasta/source/source_loader.dart:1239:21)
<asynchronous suspension>
#22     IncrementalCompiler.compileExpression.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:1961:39)
<asynchronous suspension>
#23     IncrementalCompiler.compileExpression (package:front_end/src/fasta/incremental_compiler.dart:1782:12)
<asynchronous suspension>
#24     FrontendCompiler.compileExpression (file:///b/s/w/ir/cache/builder/sdk/pkg/frontend_server/lib/frontend_server.dart:864:27)
<asynchronous suspension>
the Dart compiler exited unexpectedly.
the Dart compiler exited unexpectedly.

And debugging crashes, but the app continues to run.