Fails to export to PDF via LaTeX with a table with LaTeX content

[mbaudin47]

Describe the bug The Jupyter Notebook fails to produce the PDF using LaTeX. The error is:

! Undefined control sequence.
\LT@array ->\global \let \caption@opt@@longtable 
                                                 \@undefined \def \captionse...
l.384 ...width - 2\tabcolsep) * \real{0.6000}}@{}}
                                                  
? 
! Emergency stop.
\LT@array ->\global \let \caption@opt@@longtable 
                                                 \@undefined \def \captionse...

This happens when a text cell contains a table which has LaTeX content.

To Reproduce Steps to reproduce the behavior:

1. In Jupyter Notebook, convert a cell into text mode.
2. Paste the following content:

| A |  B |
|----------|---------------|
|F| $Lognormal(\mu = 3 \times 10^4, \sigma = 9\times 10^3, shift=15\times 10^3)$ |

3. Export to PDF via LaTeX.
4. No PDF is produced, but an error message is shown.

Expected behavior The PDF should be produced.

Screenshots

Desktop (please complete the following information):

• OS: Linux Debian 10
• Browser Firefox
• Version :

$ jupyter --version
Selected Jupyter core packages...
IPython          : 7.28.0
ipykernel        : 6.4.1
ipywidgets       : 7.6.5
jupyter_client   : 6.1.12
jupyter_core     : 4.8.1
jupyter_server   : 1.11.1
jupyterlab       : 3.1.18
nbclient         : 0.5.4
nbconvert        : 6.2.0
nbformat         : 5.1.3
notebook         : 6.4.4
qtconsole        : 5.1.1
traitlets        : 5.1.0

Please consider the exported .tex file:

Exercice-Sensibilite-SRC-cantilever-beam-Copy1.txt

The problem seems to be the LaTeX longtable environment.

[Matt-V50]

• Here is another case.

• Failure

|||||||
|:-:|:-:|:-:|:-:|:-:|:-:|
|  Data Set Characteristics  |    Multivariate    |   Number of Instances   |         13611         |        Area        |     Computer      |
|  Data Set Characteristics  |    Multivariate    |   Number of Instances   |         13611         |        Area        |     Computera     |

• Success by deleted a single letter.

|||||||
|:-:|:-:|:-:|:-:|:-:|:-:|
|  Data Set Characteristics  |    Multivariate    |   Number of Instances   |         13611         |        Area        |     Computer      |
|  Data Set Characteristics  |    Multivariate    |   Number of Instances   |         13611         |        Area        |     Computer     |

[Matt-V50]

Attach tex file, explored by jupyter. def.tex