Handle anonymous stack frames correctly

src/aggregrate-errors.js

@@ -114,7 +114,10 @@ function removeInternalFrames(stack) {
 	let internalBasePath = getInternalBasePath();
 
 	return stack.filter((frame) => {
-		return (!frame.location.path.startsWith(internalBasePath));
+		return (
+			!frame.location.anonymous
+			&& !frame.location.path.startsWith(internalBasePath)
+		);
 	});
 }
 

src/parse-stacktrace.js

@@ -18,6 +18,9 @@ function maybeTrim(value) {
 }
 
 function parseLocation(locationString) {
+	if (locationString === "<anonymous>") {
+		return { anonymous: true };
+	} else {
 		let match = positionRegex.exec(locationString);
 
 		if (match != null) {
@@ -30,6 +33,7 @@ function parseLocation(locationString) {
 			throw new Error(`Could not parse location from string: ${locationString}`);
 		}
 	}
+}
 
 function extractFrames(stack) {
 	// TODO: Maybe make this code even more cautious, and match each stacktrace line individually, aborting as soon as any one line cannot be parsed?