Bug summary

I just noticed that I cannot use\mathcal if I wantrcPrams[font.weight] = "bold".
Let me know if that's not a bug but rather expected behavior.

Code for reproduction

importmatplotlib.pyplotaspltplt.rcParams['font.weight']='bold'plt.plot(range(10),label=r'$\mathcal{A}$')plt.legend()plt.show()

Actual outcome

/home/novak/.virtualenvs/statistics/lib/python3.6/site-packages/matplotlib/mathtext.py:849: MathTextWarning: Font 'nonuniit' does not have a glyph for 'A' [U+e22d]
MathTextWarning)
/home/novak/.virtualenvs/statistics/lib/python3.6/site-packages/matplotlib/mathtext.py:850: MathTextWarning: Substituting with a dummy symbol.
warn("Substituting with a dummy symbol.", MathTextWarning)

Expected outcome

I get that LaTex may not do\mathcal in bold, but I'd expect Matplotlib to ignore the "bold" directive when plotting the legend.
However, I'm not sure how tricky would that be for implementation.

Additional information

No response

Operating system

Ubuntu 18.04

Matplotlib Version

2.2.3

Matplotlib Backend

TkAgg

Python version

3.6.9

Jupyter version

None

Installation

pip