AvaloniaUI/Avalonia · warning · InvalidOperationException

No value provided.

Error message

No value provided.

What it means

Centralized ThrowHelper.ThrowInvalidOperationException_InvalidOperation_NoValue throws InvalidOperationException "No value provided." It is a vestigial helper: in this Avalonia codebase it has no active call site (grep finds only the definition). It appears to be retained from the upstream ThrowHelper set for a nullable-value/Option-style guard but is not wired into any public PooledList/PooledStack API.

Source

Thrown at src/Avalonia.Base/Collections/Pooled/ThrowHelper.cs:318

            throw GetInvalidOperationException_EnumCurrent(index);
        }

        [DoesNotReturn]
        internal static void ThrowInvalidOperationException_InvalidOperation_EnumFailedVersion()
        {
            throw new InvalidOperationException("Collection was modified during enumeration.");
        }

        [DoesNotReturn]
        internal static void ThrowInvalidOperationException_InvalidOperation_EnumOpCantHappen()
        {
            throw new InvalidOperationException("Invalid enumerator state: enumeration cannot proceed.");
        }

        [DoesNotReturn]
        internal static void ThrowInvalidOperationException_InvalidOperation_NoValue()
        {
            throw new InvalidOperationException("No value provided.");
        }

        [DoesNotReturn]
        internal static void ThrowInvalidOperationException_ConcurrentOperationsNotSupported()
        {
            throw new InvalidOperationException("Concurrent operations are not supported.");
        }

        [DoesNotReturn]
        internal static void ThrowInvalidOperationException_HandleIsNotInitialized()
        {
            throw new InvalidOperationException("Handle is not initialized.");
        }

        [DoesNotReturn]
        internal static void ThrowFormatException_BadFormatSpecifier()
        {
            throw new FormatException("Bad format specifier.");

View on GitHub (pinned to 11c5427268)

Solutions

1. Unreachable via public APIs — confirm you are not calling an internal helper directly.
2. If you fork and wire it, ensure the caller supplies the required value before reaching this guard.
3. Treat an unexpected occurrence as a signal to audit which code path reaches it.

// Unreachable via public APIs today. If you wire this helper, ensure the
// required value is supplied before reaching the guard.

When it happens

Trigger: Not reachable through public Avalonia collection APIs — no method calls this helper. Would only fire from a custom/internal call site that a fork adds.

Common situations: Encountering it implies a custom or forked code path invokes the helper; otherwise it is dead code.

Related errors

• Overlap alignment mismatch.
• Enumeration has not started.
• Enumeration has ended.
• Concurrent operations are not supported.
• Handle is not initialized.

AI-assisted analysis of AvaloniaUI/Avalonia@11c5427268 (2026-08-13). Data as JSON: /api/errors/2b6c219f65bc6a66. Report an issue: GitHub.