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+``used-before-assignment`` is now emitted when relying on variable assignments
+that were not exhaustively made in every if/else branch.
+
+If you rely on a pattern like this:
+```
+if guarded():
+    var = 1
+
+if guarded():
+    print(var)  # now emits used-before-assignment
+```
+
+...you may be concerned that ``used-before-assignment`` is not totally useful
+in this instance. However, consider that pylint, as a static analysis tool, does
+not know if ``guarded()`` is deterministic, has side effects, or talks to
+a database. (Likewise, for ``guarded`` instead of ``guarded()``, any other
+part of your program may have changed the value in the meantime.)
+
+Closes #1727