Fixing bug

src/process.ts

@@ -81,6 +81,7 @@ function processFile(ctx: ProcessContext, file: string): Parsed | null {
       log("Skipping file %s since it has already be processed", file);
       return null;
    }
+   ctx.processedFiles.add(file);
    log("Processing file %s", file);
 
    const content = getFile(file);