javascriptAsync race conditionHard

try/catch never catches the async failure

Time: 0:00

What it should do

safeDivide(a, b) should return a / b, or -1 when the division fails. safeDivide(10, 0) should return -1.

What goes wrong

safeDivide(10, 0) throws 'divide by zero' instead of returning -1, even though the call is wrapped in try/catch.

Hints

This is an async and race conditions bug

A missing await, results in the wrong order, and updates that overwrite each other under load.