https://bugs.documentfoundation.org/show_bug.cgi?id=89783
Bug ID: 89783
Summary: sal_uint16 counters for containers exceed during
mailmerge
Product: LibreOffice
Version: Inherited From OOo
Hardware: Other
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: [email protected]
Reporter: [email protected]
Created attachment 113828
--> https://bugs.documentfoundation.org/attachment.cgi?id=113828&action=edit
main document containing 32 frames
Lot of containers for elements in writer are internally managed by
SwVectorModifyBase class which has an old method
102 sal_uInt16 GetPos(Value const& p) const
103 {
104 const_iterator const it = std::find(begin(), end(), p);
105 return it == end() ? USHRT_MAX : it - begin();
106 }
see http://opengrok.libreoffice.org/xref/core/sw/inc/docary.hxx#102
This means: In all concrete element container implementations/managers using
this methods, only 65536 elements can be managed in a safe way. Adding more
elements than 65536 may cause LibreOffice to do undefined things (in the
conrete scenario it freezes).
This limit can easily exceed in particular during mail merge.
I attached some example documents that can be used as main documents for mail
merge and a datasource with >2048 datasets. They contain just 32 elements of
one type and can't be processed by mail merge with more than 2048 datasets
(32*2048 = 65336 --> 16bit limit)
In my tests the following elements were causing troubles (and maybe others,
too):
- main document with 32 sections
- main document with 32 text frames
- main document with 32 lists
- main document with 32 different header definitions (=page styles)
- main document with 32 tables
The 16bit limit needs to be eliminated. The container behind SwVectorModifyBase
is already a std::vector (which has no 16 bit limitation), but the old Method
GetPos is referred from many places of the code (>700 hits for "git grep
GetPos")
How to reproduce the issue:
1) open one of the attached 32xxx.odt files
2) use tools->mail merge wizard
3) select 2051datasets.ods as datasource (in step 3 of the wizard)
4) run step 7 of the wizard (personalize document)
--> in most cases LO freezes after 2048 datasets
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