False positive(?) with no-unsafe-any

[ethanresnick]

Bug Report

• TSLint version: 5.4.3
• TypeScript version: 2.3.4
• Running TSLint via: (pick one) CLI

TypeScript code being linted

// code snippet
function doesTruthinessCheck(it: any): string {
  if(it) {
    return "john";
  }
  return "jane";
}

with tslint.json configuration:

"no-unsafe-any": true,

Actual behavior

Unsafe use of expression of type 'any'.

Expected behavior

I'd expect no error, as just checking the truthiness of an any typed variable doesn't seem unsafe.

[ajafff]

I agree that this is a bug. Checking for truthyness or falsyness should be allowed.
#3008 fixes this