Uncaught error when reading a Proxy object

[Fil]

The following code will log an error in the console, and the inspector will not return.

new Proxy({}, {ownKeys: function () { throw new Error("gotcha"); }})

I'd expect the inspector to catch the error and surface it (in red).

This error happens for real when using the HISTOGRAM() function in DuckDB, which returns a Proxy that doesn’t let us enumerate its keys via for…in at

inspector/src/expanded.js

Line 119 in 63535de

for (const key in array) {

(The Proxy object from Apache Arrow throws “TypeError: 0 is not a valid property name”.)

(with thanks to @mootari)