[Bug]: Invalid glyph id used in composite glyph #20368
Description
Attach (recommended) or Link to PDF file
Web browser and its version
Chrome 141.0.7390.108
Operating system and its version
Windows 11
PDF.js version
5.4.296
Is the bug present in the latest PDF.js version?
Yes
Is a browser extension
No
Steps to reproduce the problem
Open attached PDF in PDF Viewer shows only empty boxes
What is the expected behavior?
Renders all glyphs.
What went wrong?
console.log:
content_script_bundle.js:1 Attempting initialization Thu Oct 16 2025 13:55:51 GMT+0200 (Mitteleuropäische Sommerzeit)
app.js:1734 PDF 110dd61fd57444010b1ab5ff38782f0f [1.4 pdfeTeX-1.21a / TeX] (PDF.js: 5.4.336 [745e42701])
app.js:1734 PDF c5901b9d4264066fb9b92b3cb10d4434 [1.7 PDF Export 8.5.7.265.2507062319 / -] (PDF.js: 5.4.336 [745e42701])
font_loader.js:386 OTS parsing error: glyf: Invalid glyph id used in composite glyph: 280
glyf: Error validating component points and depth.
glyf: Failed to parse table
createNativeFontFace @ font_loader.js:386
util.js:391 Warning: Failed to load font 'g_d1_f1': 'SyntaxError: Invalid font data in ArrayBuffer.'.
warn @ util.js:391
Link to a viewer
No response
Additional context
Older versions (and other PDF products) render the PDF, albeit the broken glyphs are missing or rendered incomplete (small german umlauts missing the ", or missing altogether).