Uncalled-function check misses usage of complex property access

[sandersn]

Code

Based on chrome-app on Definitely Typed:

    var chrome = {
        platformKeys: {
            subtleCrypto() {
                return {
                    sign() {},
                    exportKey() { return true }
                }
            }
        }
    }
    // ok
    if (chrome.platformKeys.subtleCrypto().exportKey) {
        chrome.platformKeys.subtleCrypto().exportKey
    }

Expected behavior:
No error

Actual behavior:
Error: "Did you mean to call 'exportKey'?"

[sandersn]

@a-tarasyuk you might be interested in this too.

[MartinJohns]

This works as expected with TypeScript 4.2.0-dev.20201119. It provides an error with strictNullChecks enabled, and provides no error with strictNullChecks disabled.

[sandersn]

There should be no error under any setting since chrome.platformKeys.subtleCrypto().sign is used in the body of the if.