don't remove diagnostics

Author: reakaleek

src/Elastic.Documentation/AppliesTo/ApplicableToParser.cs

@@ -38,9 +38,6 @@ public static class ApplicableToParser
 		try
 		{
 			parsed = Deserializer.Deserialize<ApplicableTo>(yaml);
-			// Clear diagnostics to avoid memory leaks
-			if (parsed != null)
-				parsed.Diagnostics = null;
 		}
 		catch
 		{

src/Elastic.Markdown/Myst/Directives/DirectiveHtmlRenderer.cs

@@ -268,7 +268,22 @@ private static void WriteAppliesSwitch(HtmlRenderer renderer, AppliesSwitchBlock
 	private static void WriteAppliesItem(HtmlRenderer renderer, AppliesItemBlock block)
 	{
 		// Parse the applies_to definition to get the ApplicableTo object
-		var appliesTo = ApplicableToParser.ParseApplicableTo(block.AppliesToDefinition);
+		ApplicableTo? appliesTo = null;
+		try
+		{
+			appliesTo = ApplicableToParser.ParseApplicableTo(block.AppliesToDefinition);
+			if (appliesTo?.Diagnostics is not null)
+			{
+				foreach (var (severity, message) in appliesTo.Diagnostics)
+					block.Emit(severity, message);
+				appliesTo.Diagnostics = null;
+			}
+		}
+		catch (Exception e)
+		{
+			block.EmitError($"Unable to parse applies_to definition: {block.AppliesToDefinition}", e);
+		}
+
 		var slice = AppliesItemView.Create(new AppliesItemViewModel
 		{
 			DirectiveBlock = block,