Ensure that serializing of StructTree-data cannot fail during loading #18990
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I discovered that doing skip-cache re-reloading of https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf would *intermittently* cause (some of) the AnnotationLayers to break with errors printed in the console (see below). In hindsight this bug is really obvious, however it took me quite some time to find it, since the `StructTreePage.prototype.serializable` getter will lookup various data and all of those cases can fail during loading when streaming and/or range requests are being used. Finally, to prevent any future errors, ensure that the viewer won't break in these sort of situations. ``` Uncaught (in promise) Object { message: "Missing data [19098296, 19098297)", name: "UnknownErrorException", details: "MissingDataException: Missing data [19098296, 19098297)", stack: "BaseExceptionClosure@resource://pdf.js/build/pdf.mjs:453:29\n@resource://pdf.js/build/pdf.mjs:456:2\n" } viewer.mjs:8801:55 \#renderAnnotationLayer: "UnknownErrorException: Missing data [17552729, 17552730)". viewer.mjs:8737:15 Uncaught (in promise) Object { message: "Missing data [17552729, 17552730)", name: "UnknownErrorException", details: "MissingDataException: Missing data [17552729, 17552730)", stack: "BaseExceptionClosure@resource://pdf.js/build/pdf.mjs:453:29\n@resource://pdf.js/build/pdf.mjs:456:2\n" } viewer.mjs:8801:55 ```
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/botio test |
From: Bot.io (Linux m4)ReceivedCommand cmd_test from @Snuffleupagus received. Current queue size: 0 Live output at: http://54.241.84.105:8877/c25f3c381e9fe3a/output.txt |
From: Bot.io (Windows)ReceivedCommand cmd_test from @Snuffleupagus received. Current queue size: 0 Live output at: http://54.193.163.58:8877/2eb1969e0e7032c/output.txt |
From: Bot.io (Linux m4)FailedFull output at http://54.241.84.105:8877/c25f3c381e9fe3a/output.txt Total script time: 30.89 mins
Image differences available at: http://54.241.84.105:8877/c25f3c381e9fe3a/reftest-analyzer.html#web=eq.log |
From: Bot.io (Windows)SuccessFull output at http://54.193.163.58:8877/2eb1969e0e7032c/output.txt Total script time: 45.83 mins
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I discovered that doing skip-cache re-reloading of https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf would intermittently cause (some of) the AnnotationLayers to break with errors printed in the console (see below).
In hindsight this bug is really obvious, however it took me quite some time to find it, since the
StructTreePage.prototype.serializablegetter will lookup various data and all of those cases can fail during loading when streaming and/or range requests are being used.Finally, to prevent any future errors, ensure that the viewer won't break in these sort of situations.