Describe your environment - php 8.2

Context

I am not sure how it works under the hood, yet OpenTelemetry is trying to guess if given scope is closed correctly from my understanding.

1. Notice when result of $span->activate() is assigned to variable, yet not used

Having such code:

$span = $tracer->spanBuilder('test');
$context = $span->activate();

If we don't close the $context within current PHP function scope it will throw an notice:

Notice: Scope: missing call to Scope::detach() for scope #352, created 
	at OpenTelemetry.Context.Context.activate(Context.php:84)
	at OpenTelemetry.API.Trace.Span.activate(Span.php:51)

The scenario for this is where we don't want to close the context within the current PHP function scope is for separate Before and After method, where we will close the current scope by accessing scope and context in following way:

$currentContext = Context::storage()->scope();
$currentRelatedSpan = Span::getCurrent();
$currentContext->detach();
$currentRelatedSpan->end();

2. Exception when result of $span->activate() is not assigned to variable

Having such code:

$span = $tracer->spanBuilder('test');
$span->activate();

If we don't assign activate span, exception will be thrown.

Scope: unexpected call to Scope::detach() for scope #785, scope successfully detached but another scope should have been detached first

/data/app/vendor/open-telemetry/context/DebugScope.php:43

The scenario for this is the same as above. OpenTelemetry tries to guess something which works correctly, yet using singleton instances, to get and close the scopes correctly.