Hi

Using math with dejavu as the bodyfont produces:
! Math error: parameter \Umathquad\displaystyle is not set.

minimal example:
---
\setupbodyfont[dejavu]
\starttext
$e = mc^2$
\stoptext
---

Installing the xits-math (https://github.com/khaledhosny/xits-math/) solves the problem.
Shouldn't there be a fallback to lmmath or similar?

Log using context without xits-math attached.

Adam