[Libreoffice-bugs] [Bug 129163] New: Memory leak in createEnumeration

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=129163

            Bug ID: 129163
           Summary: Memory leak in createEnumeration
           Product: LibreOffice
           Version: 6.3.2.2 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: jrheinlaender at users.sourceforge.net

Description:
There seems to be a memory leak in XEnumerationAccess::createEnumeration().
When I run the following BASIC code on a Writer document, I can watch the
memory usage go up:

Sub Main
    for i = 1 to 100000
        text = ThisComponent.getText()

        paragraphs = text.createEnumeration()

        while (paragraphs.hasMoreElements())
            paragraph = paragraphs.nextElement()

            parenum = paragraph.createEnumeration()
        wend
    next
End Sub

I discovered the problem first in a C++ Extension where it seems to be a
lot worse (a few hundred iterations are enough). But it also seems to
depend on how many paragraphs the document has. A large document will
fill memory faster than a small document.

Steps to Reproduce:
Run the following BASIC code on a Writer document and watch the memory usage go
up:

Sub Main
    for i = 1 to 100000
        text = ThisComponent.getText()

        paragraphs = text.createEnumeration()

        while (paragraphs.hasMoreElements())
            paragraph = paragraphs.nextElement()

            parenum = paragraph.createEnumeration()
        wend
    next
End Sub

Actual Results:
The final result is a crash because of unavailable memory.

Expected Results:
Not used ever increasing memory.


Reproducible: Always


User Profile Reset: Yes



Additional Info:

Version: 6.3.3.2
Build-ID: 1:6.3.3-0ubuntu0.18.04.1~lo1
CPU-Threads: 4; BS: Linux 4.15; UI-Render: Standard; VCL: kde5;

and also:

Version: 6.3.2.2 (x64)
Build-ID: 98b30e735bda24bc04ab42594c85f7fd8be07b9c
CPU-Threads: 2; BS: Windows 6.3; UI-Render: Standard; VCL: win;

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