ErrLookup › dotnet/reactive
dotnet/reactive
The Reactive Extensions for .NET · C# · 1,268 source files
Analyzed at 94b5d5ab91 on 2026-09-15. 531 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Value cannot be null. (Parameter 'source6') | exception | error | null-argument, argument-validation, reactive-extensions, combinelatest |
| null (Parameter 'scheduler') | exception | error | argument-null, scheduler, reactive, async |
| nameof(removeHandler) | validation | error | argument-null, csharp, reactive-extensions, fromeventpattern |
| Value cannot be null. (Parameter 'observer') | exception | error | argument-null, asyncrx, observer, average-int32 |
| Accept did not call any IObserver<T> method | exception | error | invalidoperation, notification, accept, invariant |
| source10 | validation | error | argumentnull, zip, observables, null-check, system-reactive |
| Value cannot be null. (Parameter 'eleventh') | validation | error | rx, null-reference, argument-validation, qbservable |
| Element no longer available in the buffer. | exception | error | linq, invalid-operation, buffering, shared-sequence, ix-interactive |
| stateMachine | exception | error | argument-null, async, state-machine, compiler-services |
| Value cannot be null. (Parameter 'values') | validation | error | argument-null, ienumerable, scheduler, reactive |
| Value cannot be null. (Parameter 'end') | exception | error | argument-null, apm, fromasyncpattern, generated-code |
| Could not find method with name '{0}' on type '{1}'. | exception | error | linq, expression-translation, queryable, async |
| Strings_Linq.NO_ELEMENTS | exception | error | reactive, linq, empty-sequence, aggregation, system-reactive |
| Value cannot be null. (Parameter 'scheduler') | validation | error | argument-null, scheduler, generate, asyncrx, fail-fast |
| ArgumentNullException: conversion | validation | error | rx, null-argument, windows-runtime, events |
| Value cannot be null. (Parameter 'fifteenth') | exception | error | rx, argument-null, qbservable, zip |
| There is no method '{0}' on type '{1}' that matches the spec | exception | error | linq, expression-translation, overload-resolution |
| Value cannot be null. (Parameter 'source') | exception | error | csharp, asyncrx, null-check, valuetask |
| Value cannot be null. (Parameter 'fourteenth') | exception | error | rx, null-argument, observable, argumentnull |
| null | exception | error | null-argument, csharp, linq, observer |
| predicate | exception | error | dotnet, rx, null-argument, argument-validation |
| Value cannot be null. (Parameter 'second') | validation | error | reactive, argument-null, zip |
| selector | validation | error | argument-null, replay, async-reactive |
| Value cannot be null. (Parameter 'resultSelector') | exception | error | argument-null, asyncrx, linq-operators, selectmany |
| Value cannot be null. (Parameter 'tenth') | validation | error | argument-null, reactive-extensions, combinelatest, qbservable, validation |
| Strings_Linq.EVENT_REMOVE_METHOD_SHOULD_TAKE_ONE_PARAMETER | exception | error | reflection, events, invalid-argument |
| NO_MATCHING_ELEMENTS | exception | error | rx, reactive-extensions, single-operator, empty-sequence |
| The observer has already terminated. | exception | error | |
| source14 | validation | error | argumentnull, zip, observables, null-check, system-reactive |
| Value cannot be null. (Parameter 'source13') | exception | error | argumentnull, zip-operator, null-check, asyncrx |
| Value cannot be null. (Parameter 'subscribeAsync') | validation | error | argument-null, linq-operator, fail-fast |
| progress (Parameter 'progress') | validation | error | argumentnull, winrt, rx, progress |
| Specified argument was out of the range of valid values. (Pa | validation | error | argument-out-of-range, timespan, reactive, replay |
| ArgumentNullException: durationSelector | validation | error | csharp, argument-null, async-rx, groupbyuntil |
| nameof(source) | validation | error | rx, argument-null, blocking, wait |
| nameof(observer) | exception | error | argument-null, async-rx, operator |
| {type} does not have an element type | validation | error | reflection, arrays, apicompare, tooling |
| The handler returned a null IObservable | exception | error | repeatwhen, null-handler-result, observable, invalid-handler |
| Invalid return type for + m.Name | exception | error | csharp, reflection, code-generation, tooling |
| scheduler | validation | error | argument-null, scheduler, takeuntil, reactive-extensions |
| Accept should have called only one IObserver<T> method | exception | error | invalidoperation, notification, accept, invariant |
| action (Value cannot be null) | validation | error | null-argument, scheduler, reactive-extensions |
| nameof(scheduler) | validation | error | argument-null, scheduler, reactive-extensions, dotnet |
| WINRT_NO_SUB1MS_TIMERS (Parameter 'period') | validation | error | argument-out-of-range, scheduler, timer, platform-limitation, winrt |
| Could not rewrite method with name '{0}' without a Declaring | exception | error | expression-translation, reflection, async |
| nameof(predicate) | validation | error | rx, argument-null, predicate, linq |
| ArgumentNullException(nameof(witness)) | validation | error | null-argument, argument-validation, async-reactive |
| begin | validation | error | csharp, null-argument, rx, async |
| Disposable already assigned. | exception | error | csharp, invalid-operation, async-disposable, concurrency, state-error |
| Expected Qbservable.ToQueryable. | exception | error | linq, expression-tree, rx, argument-exception |
| Value cannot be null. (Parameter 'onCompletedAsync') | validation | error | csharp, null-argument, asyncrx, argument-validation |
| Value cannot be null. (Parameter 'twelfth') | validation | error | rx, argument-null, observable, combinelatest |
| AdvanceBy cannot be called when the scheduler is already run | exception | error | rx, scheduler, virtual-time, invalid-operation |
| source15 | validation | error | rx, null-argument, argument-validation, zip, reactive-extensions |
| Value cannot be null. (Parameter 'source10') | exception | error | csharp, dotnet, rxjs, null-argument, argument-validation |
| Value cannot be null. (Parameter 'taskSelector') | validation | error | rx, null-argument, delegate, system-reactive |
| Value cannot be null. (Parameter 'context') | validation | error | roslyn, analyzer, null-argument |
| resultSelector | exception | error | argument-null, argument-validation, rx-operator |
| eighth | exception | error | csharp, rx, argument-null, reactive-extensions |
| comparer | validation | error | null-reference, comparer, argument-validation, async-rx, groupbyuntil |
| left | exception | error | argument-null, qbservable, join-pattern, rx, dotnet |
| source | exception | error | argumentnull, winrt, reactive-extensions, null-source, dispatcher |
| Specified argument was out of the range of valid values. (Pa | exception | error | rx, testscheduler, virtual-time, argument-out-of-range |
| Unexpected failure when building NuGet package to be consume | exception | error | nuget, build, pack, test-harness |
| Did not get output from program | exception | error | process, timeout, stdout, test-harness |
| Value cannot be null. (Parameter 'onErrorAsync') | exception | error | argumentnull, asyncrx, observer, null-check |
| source11 | validation | error | argumentnull, zip, observables, null-check, system-reactive |
| source12 | validation | error | argumentnull, zip, observables, null-check, system-reactive |
| The specified expression is not assignable to the result typ | exception | error | type-mismatch, async, linq |
| third | exception | error | argumentnull, qbservable, combinelatest, reactive-extensions |
| Argument cannot be null (Parameter name: onNext) | exception | error | asyncrx, argument-null, onnext, foreachasync |
| Argument cannot be null (Parameter name: predicate) | exception | error | argumentnull, predicate, asyncrx, first |
| nameof(onError) | exception | error | argument-null, rx, do-operator, csharp |
| source13 | validation | error | argumentnull, zip, observables, null-check, system-reactive |
| Value cannot be null. (Parameter 'begin') | exception | error | argument-null, apm, fromasyncpattern, generated-code |
| subject | validation | error | null-reference, argument-validation, rx, subject, multicast |
| Value cannot be null. (Parameter 'source7') | exception | error | dotnet, reactive-extensions, null-argument, zip |
| elementSelector | validation | error | argument-null, linq, async-rx, groupbyuntil |
| There is no method '{0}' on type '{1}' that matches the spec | exception | error | linq, expression-tree, rx, method-resolution |
| The delegate type for an event conforming to the traditional | exception | error | reflection, events, argument-validation |
| throw new ArgumentNullException(nameof(observer)); | validation | error | argument-null, observer, async-reactive, internal-api |
| removeHandler | exception | error | argument-null, reactive-extensions, events, dotnet |
| The asynchronous operation failed with a null error code. | exception | error | winrt, async, null-error-code, interop |
| Value cannot be null. (Parameter 'timeSpan') | exception | error | argumentnull, argument-range, asyncrx, buffer, timespan |
| condition | exception | error | argument-null, conditional-operator, rx-operator |
| keySelector | validation | error | csharp, rx, argument-validation, null-reference |
| Value cannot be null. (Parameter 'sixth') | validation | error | argument-null, reactive-extensions, combinelatest, qbservable, validation |
| throw new ArgumentNullException(nameof(sixteenth)) | exception | error | argumentnull, rx, combinelatest, qbservable |
| Value cannot be null. (Parameter 'ninth') | exception | error | rx, null-check, combinelatest, argument-validation |
| addHandler | exception | error | argumentnull, fromevent, csharp, event-handlers |
| Argument cannot be null (Parameter name: observer) | exception | error | csharp, null-argument, observer, async-rx |
| observer | exception | error | argument-null, internal-api, observer |
| throw new ArgumentNullException(nameof(predicate)); | validation | error | argument-null, predicate, takewhile, async |
| Value cannot be null. (Parameter 'conversion') | validation | error | csharp, null-argument, reactive-extensions, delegates |
| conversion | exception | error | argument-null, delegate-conversion, reactive-extensions, dotnet |
| Settings are invalid: {rxPackagesValidationResult.Message} | exception | error | csharp, invalid-operation-exception, validation, command-line |
| Value cannot be null. (Parameter 'action') | exception | error | csharp, dotnet, null-argument, scheduler, rx |
| Value cannot be null. (Parameter 'first') | exception | error | csharp, rx, argument-validation, null-reference |
| Strings_Core.DISPOSABLES_CANT_CONTAIN_NULL | validation | error | argument-validation, null-value, disposable |
| throw new ArgumentNullException(nameof(scheduler)); | validation | error | argument-null, scheduler, validation |