#1377 zip + lzma + password = Crash

Vesko Jel

7-Zip crashes, when I try to archive something with the following configuration:
Archive Format: zip
Compression Method: LZMA
Password: anypass

Environment: Windows 7 x64 + 7Z 9.20

It's not hard to reproduce the bug, just play around with the "Dictionary Size", "Word Size" settings.

1 Attachments


  • Jesus Herrera

    Jesus Herrera - 2013-10-19

    I tried the steps on the video and couldn't reproduce the problem.

    7-zip version: 9.20 x64.
    Windows 7 x64.

    Last edit: Jesus Herrera 2013-10-19
  • pBandi

    pBandi - 2013-10-22


    I have a similar issue. 7-Zip always crashes if I try to use LZMA compression method and AES-256 encryption method together. It works if either LZMA or AES-256 is not selected.

    - 7-Zip: 9.20 x64
    - Windows: Windows 8 x64
    - CPU type: Intel Core i7-2860QM

    AES-NI instruction set is enabled and works fine according to TrueCrypt tests.

  • Expat47

    Expat47 - 2015-04-23

    This is still happening. I reloaded v9.20 then tried v9.38b both for 64bit on fully updated Windows 7. Both will create PW protected 7z files. I've captured the relevant windows. (see attachments)

    If there is something I can do to assist please let me know.

    Last edit: Expat47 2015-04-23
  • Igor Pavlov

    Igor Pavlov - 2015-04-24

    Thanks for report!

    There is BUG for combination: ZIP / LZMA / AES / CPU with hardware AES-NI instructions.
    I suppose that 7-Zip 15.00 alpha doesn't contain that BUG.
    Please check 7-Zip 15.00.

  • Igor Pavlov

    Igor Pavlov - 2015-04-24
    • status: open --> open-fixed
    • Group: -->
    • Priority: 5 --> 6
  • Expat47

    Expat47 - 2015-04-24

    I'm sorry, I don't understand. Are you asking me to test 15A? If so, where do I find this alpha version?


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