[Bug]: Error: /typecheck in --runpdf--

[muramasatheninja]

Describe the bug

Some background info. I'm using paperless-ngx. I tried to add the Document ECMA-395 (Ultra-Speed
Compact Disc ReWritable System Description" Which can be found at the following website.
https://www.ecma-international.org/publications-and-standards/standards/ecma-395/

When trying to add it to paperless-ngx it call myocrpdf and fails at the end. I went ahead and tried processing the file with myocrpdf directly, and it fails with the following.

Error: /typecheck in --runpdf--
Operand stack:
--nostringval-- --nostringval-- --nostringval-- --nostringval--
Execution stack:
%interp_exit .runexec2 --nostringval-- runpdf --nostringval-- 2 %stopped_push --nostringval-- runpdf runpdf false 1 %stopped_push 1974 1 3 %oparray_pop
1973 1 3 %oparray_pop 1961 1 3 %oparray_pop 1962 1 3 %oparray_pop runpdf runpdf runpdf runpdf
Dictionary stack:
--dict:778/1123(ro)(G)-- --dict:0/20(G)-- --dict:87/200(L)-- --dict:18/20(L)--
Current allocation mode is local
GPL Ghostscript 10.01.2: Unrecoverable error, exit code 1

SubprocessOutputError: Ghostscript PDF/A rendering failed

I found a similiar bug from paperless-ngx
paperless-ngx/paperless-ngx#3933

They seem to think this is an ocrmypdf issue. It seems like ghostcript is the component failing but I'm not familiar with how ocrpdf is calling it so I figured i would start here.

Steps to reproduce

1. ocrmypdf --force-ocr ECMA-395_1st_edition_december_2010.pdf ecma-395_ocr.pdf
2. ocrmypdf scans content
3. reaches postprocessing.
4. fails with error above.
https://www.ecma-international.org/publications-and-standards/standards/ecma-395/

Files

Input is copyrighted but is freely available. No output was created.
ocrmypdf_ecma_395_log.txt

How did you download and install the software?

No response

OCRmyPDF version

14.4.0

Relevant log output

ocrmypdf 14.4.0                                                                                                                                   __main__.py:57
Running: ['tesseract', '--version']                                                                                                              __init__.py:133
Found tesseract 5.3.0                                                                                                                            __init__.py:350
Running: ['tesseract', '--version']                                                                                                              __init__.py:133
Running: ['gs', '--version']                                                                                                                     __init__.py:133
Found gs 10.01.2                                                                                                                                 __init__.py:350
Running: ['gs', '--version']                                                                                                                     __init__.py:133
Running: ['tesseract', '--list-langs']                                                                                                           __init__.py:133
stdout/stderr = List of available languages in "/usr/share/tesseract/tessdata/" (1):                                                              __init__.py:73
eng                                                                                                                                                             
                                                                                                                                                                
os.symlink(ECMA-395_1st_edition_december_2010.pdf, /tmp/ocrmypdf.io.o4dxioqt/origin)                                                              helpers.py:160
os.symlink(/tmp/ocrmypdf.io.o4dxioqt/origin, /tmp/ocrmypdf.io.o4dxioqt/origin.pdf)                                                                helpers.py:160
Scanning contents     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 130/130 0:00:00
Using Tesseract OpenMP thread limit 1                                                                                                       tesseract_ocr.py:176
Start processing 32 pages concurrently                                                                                                              

--------snipped because too long for github full log attached--------------

OCR                   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 130/130 0:00:00
Postprocessing...                                                                                                                                   _sync.py:307
os.symlink(/tmp/ocrmypdf.io.o4dxioqt/graft_layers.pdf, /tmp/ocrmypdf.io.o4dxioqt/fix_docinfo.pdf)                                                 helpers.py:160
Running: ['gs', '--version']                                                                                                                     __init__.py:133
Running: ['gs', '-dBATCH', '-dNOPAUSE', '-dSAFER', '-dCompatibilityLevel=1.6', '-sDEVICE=pdfwrite', '-dAutoRotatePages=/None',                   __init__.py:133
'-sColorConversionStrategy=LeaveColorUnchanged', '-dPDFSTOPONERROR', '-dAutoFilterColorImages=true', '-dAutoFilterGrayImages=true',                             
'-dJPEGQ=95', '-dPDFA=2', '-dPDFACompatibilityPolicy=1', '-o', '-', '-sstdout=%stderr', '/tmp/ocrmypdf.io.o4dxioqt/fix_docinfo.pdf',                            
'/tmp/ocrmypdf.io.o4dxioqt/pdfa.ps']                                                                                                                            
GPL Ghostscript 10.01.2 (2023-06-21)                                                                                                             __init__.py:108
Copyright (C) 2023 Artifex Software, Inc.  All rights reserved.                                                                                  __init__.py:108
This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:                                                                       __init__.py:108
see the file COPYING for details.                                                                                                                __init__.py:108
Error: /typecheck in --runpdf--                                                                                                                  __init__.py:108
Operand stack:                                                                                                                                   __init__.py:108
--nostringval--   --nostringval--   --nostringval--   --nostringval--                                                                            __init__.py:108
Execution stack:                                                                                                                                 __init__.py:108
%interp_exit   .runexec2   --nostringval--   runpdf   --nostringval--   2   %stopped_push   --nostringval--   runpdf   runpdf   false   1        __init__.py:108
%stopped_push   1974   1   3   %oparray_pop   1973   1   3   %oparray_pop   1961   1   3   %oparray_pop   1962   1   3   %oparray_pop   runpdf                  
runpdf   runpdf   runpdf                                                                                                                                        
Dictionary stack:                                                                                                                                __init__.py:108
--dict:778/1123(ro)(G)--   --dict:0/20(G)--   --dict:87/200(L)--   --dict:18/20(L)--                                                             __init__.py:108
Current allocation mode is local                                                                                                                 __init__.py:108
GPL Ghostscript 10.01.2: Unrecoverable error, exit code 1                                                                                        __init__.py:108
GPL Ghostscript 10.01.2 (2023-06-21)                                                                                                          ghostscript.py:245
Copyright (C) 2023 Artifex Software, Inc.  All rights reserved.                                                                                                 
This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:                                                                                      
see the file COPYING for details.                                                                                                                               
Error: /typecheck in --runpdf--                                                                                                                                 
Operand stack:                                                                                                                                                  
   --nostringval--   --nostringval--   --nostringval--   --nostringval--                                                                                        
Execution stack:                                                                                                                                                
   %interp_exit   .runexec2   --nostringval--   runpdf   --nostringval--   2   %stopped_push   --nostringval--   runpdf   runpdf   false   1                    
%stopped_push   1974   1   3   %oparray_pop   1973   1   3   %oparray_pop   1961   1   3   %oparray_pop   1962   1   3   %oparray_pop                           
runpdf   runpdf   runpdf   runpdf                                                                                                                               
Dictionary stack:                                                                                                                                               
   --dict:778/1123(ro)(G)--   --dict:0/20(G)--   --dict:87/200(L)--   --dict:18/20(L)--                                                                         
Current allocation mode is local                                                                                                                                
GPL Ghostscript 10.01.2: Unrecoverable error, exit code 1                                                                                                       
                                                                                                                                                                
ExitCodeException                                                                                                                                   _sync.py:430
Traceback (most recent call last):                                                                                                                              
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_exec/ghostscript.py", line 232, in generate_pdfa                                                            
    p = run_polling_stderr(                                                                                                                                     
        ^^^^^^^^^^^^^^^^^^^                                                                                                                                     
  File "/usr/lib/python3.11/site-packages/ocrmypdf/subprocess/__init__.py", line 114, in run_polling_stderr                                                     
    raise CalledProcessError(proc.returncode, args, output=None, stderr=stderr)                                                                                 
subprocess.CalledProcessError: Command '['gs', '-dBATCH', '-dNOPAUSE', '-dSAFER', '-dCompatibilityLevel=1.6', '-sDEVICE=pdfwrite',                              
'-dAutoRotatePages=/None', '-sColorConversionStrategy=LeaveColorUnchanged', '-dPDFSTOPONERROR', '-dAutoFilterColorImages=true',                                 
'-dAutoFilterGrayImages=true', '-dJPEGQ=95', '-dPDFA=2', '-dPDFACompatibilityPolicy=1', '-o', '-', '-sstdout=%stderr',                                          
'/tmp/ocrmypdf.io.o4dxioqt/fix_docinfo.pdf', '/tmp/ocrmypdf.io.o4dxioqt/pdfa.ps']' returned non-zero exit status 1.                                             
                                                                                                                                                                
The above exception was the direct cause of the following exception:                                                                                            
                                                                                                                                                                
Traceback (most recent call last):                                                                                                                              
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_sync.py", line 391, in run_pipeline                                                                         
    optimize_messages = exec_concurrent(context, executor)                                                                                                      
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                      
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_sync.py", line 308, in exec_concurrent                                                                      
    pdf, messages = post_process(pdf, context, executor)                                                                                                        
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                        
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_sync.py", line 239, in post_process                                                                         
    pdf_out = convert_to_pdfa(pdf_out, ps_stub_out, context)                                                                                                    
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                    
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_pipeline.py", line 790, in convert_to_pdfa                                                                  
    context.plugin_manager.hook.generate_pdfa(                                                                                                                  
  File "/usr/lib/python3.11/site-packages/pluggy/_hooks.py", line 265, in __call__                                                                              
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)                                                                                 
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                 
  File "/usr/lib/python3.11/site-packages/pluggy/_manager.py", line 80, in _hookexec                                                                            
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)                                                                                        
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                        
  File "/usr/lib/python3.11/site-packages/pluggy/_callers.py", line 60, in _multicall                                                                           
    return outcome.get_result()                                                                                                                                 
           ^^^^^^^^^^^^^^^^^^^^                                                                                                                                 
  File "/usr/lib/python3.11/site-packages/pluggy/_result.py", line 60, in get_result                                                                            
    raise ex[1].with_traceback(ex[2])                                                                                                                           
  File "/usr/lib/python3.11/site-packages/pluggy/_callers.py", line 39, in _multicall                                                                           
    res = hook_impl.function(*args)                                                                                                                             
          ^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                             
  File "/usr/lib/python3.11/site-packages/ocrmypdf/builtin_plugins/ghostscript.py", line 77, in generate_pdfa                                                   
    ghostscript.generate_pdfa(                                                                                                                                  
  File "/usr/lib/python3.11/site-packages/ocrmypdf/_exec/ghostscript.py", line 246, in generate_pdfa                                                            
    raise SubprocessOutputError('Ghostscript PDF/A rendering failed') from e                                                                                    
ocrmypdf.exceptions.SubprocessOutputError: Ghostscript PDF/A rendering failed

[jbarlow83]

--continue-on-soft-render-error will work around the issue.

This is likely a Ghostscript issue. Earlier versions of Ghostscript (9.55) don't produce this error. Some time around 10.x, it appeared. I cannot make sense of the error message from Ghostscript.

I could not identify any issue with the input PDF (as seen right before handing off to Ghostscript). iText RUPS, qpdf, Foxit report no syntax issues or other issues. I also tried deleting all of the metadata before processing, and the struct tree, and this does not fix the issue.

[stumpylog]

From the paperless-ngx side, this type of error is described here in our trouble shooting documentation along with the workaround.

[jbarlow83]

Reported as https://bugs.ghostscript.com/show_bug.cgi?id=707258