RenderHandler breaks render when context is missing

[eudaimos]

If RenderHandler has a context set that isn't available by name in the surrounding provider (there was no DataHandler with the given name) then rendering is broken.

the offending line is:

function recursiveContextGenerator(
  …
) {
  const ctxName = ctxList[ctxIdx];
→ const context = getContext(ctxName);
  …
}

leads to trying to make a <context.Consumer> which can't get Consumer of undefined

Solution: check for context missing after getContext(ctxName) call and handle it

[eudaimos]

fixed by c5556ed