JS errors if new query adds another trace to invisible histogram with Split transform

[oliver]

There's a problem which will make the whole plot unresponsive in a (probably very) rare case, due to Javascript errors being thrown:

• open https://lana-k.github.io/sqliteviz/

• open both attached test1.csv and test2.csv files (into the same database)

  • test1.csv
  • test2.csv

• import Inquiry from js-bug-try2.json (js-bug.json.gz)

• run the SQL query (SELECT * FROM "test1") and display the graph. It works fine, and hovering over the two points shows the expected tooltips.

• change the SQL query to SELECT * FROM "test2", and run it.

  • problem: the graph is not updated; and hovering over the points in the plot shows no tooltips
  • and there are JS errors in console now:

  	Uncaught TypeError: N is undefined
  		S hover.js:308
  		hover hover.js:80
  		l throttle.js:48
  		throttle throttle.js:57
  		hover hover.js:77
  		onmousemove graph_interact.js:67
  	hover.js:308:29
  

• in legend, click on the "action1 (trace 0)" graph to make it visible. Result: a new graph for action3 is added, and the graph works again.

This happened with sqliteviz version: 0.15.2 .

Thanks for your work on sqliteviz, it is really useful for me! I've used it so much now that I encounter the really rare edge cases ;-)