Add better error message for PDFs with invalid CTMs

Closes #1303
2024-05-07 14:00:30 -07:00
parent 0e013df161
commit 99c78650b6
1 changed files with 7 additions and 1 deletions
@@ -239,7 +239,13 @@ def _interpret_contents(contentstream: Object, initial_shorthand=UNIT_SQUARE):
                # to do. Just pretend nothing happened, keep calm and carry on.
                warn("PDF graphics stack underflowed - PDF may be malformed")
        elif operator == 'cm':
-            ctm = Matrix(operands) @ ctm
+            try:
+                ctm = Matrix(operands) @ ctm
+            except ValueError:
+                raise InputFileError(
+                    "PDF content stream is corrupt - this PDF is malformed. "
+                    "Use a PDF editor that is capable of visually inspecting the PDF."
+                )
        elif operator == 'Do':
            image_name = operands[0]
            settings = XobjectSettings(