LineReader/index.html#type-t">IBase.LineReader.t</a> <span>&#45;&gt;</span> <a href="../../IBase/Location/index.html#type-t">IBase.Location.t</a> <span>&#45;&gt;</span> <a href="../TypeErr/InstrRef/index.html#type-t">TypeErr.InstrRef.t</a> <span>&#45;&gt;</span> unit</code></dt><dd><p><code>expr</code> is an expression that was explicitly compared with `null`. At the same time, <code>expr</code> had <code>inferred_nullability</code> before the comparision. Check if the comparision is redundant and emit an i