Merge pull request #2639 from bladerunner2020/master

fix: empty markdown files in external documents

src/lib/converter/comments/parser.ts

@@ -203,7 +203,7 @@ export function parseCommentString(
  // Check for frontmatter
  let frontmatterData: Record<string, unknown> = {};
  const firstBlock = content[0];
- if (firstBlock.text.startsWith("---\n")) {
+ if (firstBlock?.text?.startsWith("---\n")) {
  const end = firstBlock.text.indexOf("\n---\n");
  if (end !== -1) {
  const yamlText = firstBlock.text.slice("---\n".length, end);

src/test/converter2/issues/gh2638/index.ts

@@ -0,0 +1,5 @@
+/**
+ * @module
+ * @document empty.md
+ */
+export const a = 123;

src/test/issues.c2.test.ts

@@ -1655,4 +1655,12 @@ describe("Issue Tests", () => {
  const sig = querySig(project, "B.constructor");
  equal(sig.parameters?.length, 1);
  });
+
+ it("#2638 empty markdown file", () => {
+ const project = convert();
+ equal(
+ project.documents?.map((d) => d.content),
+ [[]],
+ );
+ });
 });