https://bugs.documentfoundation.org/show_bug.cgi?id=82781

--- Comment #14 from Julien Nabet <[email protected]> ---
Created attachment 121656
  --> https://bugs.documentfoundation.org/attachment.cgi?id=121656&action=edit
gdb debug + bt with debug symbols

On pc Debian x86-64 with master sources updated today, I gave a new try and
reproduced this.
Then I tried to understand the root cause of this:
/usr/include/c++/5/debug/safe_iterator.h:303:error: attempt to dereference 
    a singular iterator.

Objects involved in the operation:
iterator "this" @ 0x0x7ffca0230da0 {
type =
N11__gnu_debug14_Safe_iteratorIN9__gnu_cxx17__normal_iteratorIPKP11PreviewPageNSt9__cxx19986vectorIS4_SaIS4_EEEEENSt7__debug6vectorIS4_S9_EEEE
(constant iterator);
  state = singular;
  references sequence with type `NSt7__debug6vectorIP11PreviewPageSaIS2_EEE' @
0x0x3476678
}

The problem is showed by the gdb debug + bt:
during loop
http://opengrok.libreoffice.org/xref/core/sw/source/core/view/pagepreviewlayout.cxx#1082
in SwPagePreviewLayout::Paint, we call
SwPagePreviewLayout::_ClearPreviewPageData

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