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Fallback and try a *previous* generation if all else fails in XRef.indexObjects (issue 15577)

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When we fail to find a usable PDF document `trailer` *and* there were errors during parsing, try and fallback to a *previous* generation as a last resort during fetching of uncompressed references.
*Please note:* This will not affect "normal" PDF documents, with valid /XRef data, and even most *corrupt* documents should be completely unaffected by these changes.
This commit is contained in:
Jonas Jenwald 2022-10-16 13:15:07 +02:00
parent 9355b72931
commit de99f99a01
3 changed files with 30 additions and 3 deletions
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1
test/pdfs/issue15577.pdf.link Normal file
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@ -0,0 +1 @@
https://github.com/mozilla/pdf.js/files/9813960/hang-080214-152005-90.pdf

8
test/test_manifest.json
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@ -661,6 +661,14 @@
"lastPage": 1,
"type": "eq"
},
{ "id": "issue15577",
"file": "pdfs/issue15577.pdf",
"md5": "6939244cf44b7b31ff960b58ed7e4004",
"link": true,
"rounds": 1,
"lastPage": 1,
"type": "eq"
},
{ "id": "hmm-pdf",
"file": "pdfs/hmm.pdf",
"md5": "e08467e60101ee5f4a59716e86db6dc9",