BoundaryML/baml · error

failed to get calls count: %w

Error message

failed to get calls count: %w

What it means

CallsCount() fetches the number of LLM calls recorded in a function log by invoking the remote 'calls_count' method through raw_objects.CallMethod. This error wraps any failure of that bridge call (transport, marshaling, method-not-found, runtime error). It is the wrapping variant, not the type-check variant.

Source

Thrown at engine/language_client_go/pkg/rawobjects_function_log.go:114

func (f *functionLog) RawLLMResponse() (string, error) {
	result, err := raw_objects.CallMethod(f, "raw_llm_response", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get raw LLM response: %w", err)
	}

	response, ok := result.(string)
	if !ok {
		return "", fmt.Errorf("unexpected type for raw LLM response: %T", result)
	}

	return response, nil
}

func (f *functionLog) CallsCount() (int, error) {
	result, err := raw_objects.CallMethod(f, "calls_count", nil)
	if err != nil {
		return 0, fmt.Errorf("failed to get calls count: %w", err)
	}

	count, ok := result.(int)
	if !ok {
		return 0, fmt.Errorf("unexpected type for calls count: %T", result)
	}

	return count, nil
}

func (f *functionLog) Calls() ([]LLMCall, error) {
	result, err := raw_objects.CallMethod(f, "calls", nil)
	if err != nil {
		return nil, fmt.Errorf("failed to get calls: %w", err)
	}

	result_cast := result.([]raw_objects.RawPointer)
	calls := make([]LLMCall, len(result_cast))

View on GitHub (pinned to bd85ce9dee)

Solutions

1. Log the wrapped error (%w chain) to find the root cause from the bridge
2. Verify the runtime object still exposes a 'calls_count' method (check runtime version vs Go bindings)
3. Re-acquire the function log object instead of reusing a possibly-disposed one

// no pre-call check possible; ensure the FunctionLog handle is fresh:
if flog == nil { return 0, errors.New("nil function log") }

count, err := flog.CallsCount()
if err != nil {
    return 0, fmt.Errorf("calls count unavailable: %w", err)
}

When it happens

Trigger: Calling FunctionLog.CallsCount() when the underlying runtime object is stale/disposed, the 'calls_count' method is missing or renamed, or the runtime raises an exception while computing the count.

Common situations: Version mismatch where the runtime no longer exposes 'calls_count'; accessing a function log after its backing object was garbage-collected in the runtime; network/IPC transport failures to the language runtime.

Understand the failure class

Background: Type mismatch errors: IllegalArgumentException, TypeError and type guards across 150 open-source libraries — this error's family across 150 libraries.

Related errors

• failed to get calls: %w
• failed to get selected call: %w
• failed to get tags: %w
• unexpected type for raw LLM response: %T
• failed to get text: %w

AI-assisted analysis of BoundaryML/baml@bd85ce9dee (2026-09-12). Data as JSON: /api/errors/a00ad41b3ea3ddbc. Report an issue: GitHub.