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Ensure that Dicts found in Object Streams are assigned an objId in XRef.fetch

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This fixes something that I noticed while working with the code in `Catalog.getPageDict` when debugging issue 8088.

Note that while I don't have an example where this patch really matters, given that e.g. `PartialEvaluator.hasBlendModes` depends on the `objId` to avoid cyclic references this patch could potentially help for some PDF files.
This commit is contained in:
Jonas Jenwald 2017-02-24 16:01:09 +01:00
parent 54e86f441b
commit 14cc6acb90
1 changed files with 5 additions and 0 deletions
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src/core/obj.js
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@ -1241,6 +1241,11 @@ var XRef = (function XRefClosure() {
var num = ref.num; var num = ref.num;
if (num in this.cache) { if (num in this.cache) {
var cacheEntry = this.cache[num]; var cacheEntry = this.cache[num];
// In documents with Object Streams, it's possible that cached `Dict`s
// have not been assigned an `objId` yet (see e.g. issue3115r.pdf).
if (isDict(cacheEntry) && !cacheEntry.objId) {
cacheEntry.objId = ref.toString();
}
return cacheEntry; return cacheEntry;
} }