Eeschema generates corrupted schematic file

[Wayne Stambaugh]

Using KiCAD 5.1.2 on W10 this bug is still present.
Steps to reproduce:
1. Create a multi-line cell in Excel
2. Copy and paste content to a component field in eeschema
3. Save, close and reopen the sheet: the sheet will not open.

Pasting from both the component symbol properties windows AND the "Edit symbol fields" tool cause the file corruption.

Application: kicad
Version: (5.1.2)-1, release build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.61.1 OpenSSL/1.1.1 (WinSSL) zlib/1.2.11 brotli/1.0.6 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) nghttp2/1.34.0
Platform: Windows 8 (build 9200), 64-bit edition, 64 bit, Little endian, wxMSW
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8)
    Boost: 1.68.0
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.61.1
    Compiler: GCC 8.2.0 with C++ ABI 1013

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

[Michael Kavanagh (michaelkavanagh)]

Related? https://bugs.launchpad.net/kicad/+bug/1827141

[Wayne Stambaugh (stambaughw)]

I did some testing and this doesn't affect all fields. It does not affect the value and reference fields text and the field name text for non-mandatory fields. I does affect the footprint, datasheet and all non-mandatory field text. It looks like we need some additional validators added to the field grid table in order to prevent this. I suspect this also affects the field edit dialog in the symbol editor as well.

[KiCad Janitor (kicad-janitor)]

Fixed in revision ae54f34392407cfd9d4628cf3087f07f239cebb2
https://git.launchpad.net/kicad/patch/?id=ae54f34392407cfd9d4628cf3087f07f239cebb2