Include else block in break detection (#1143)

resources/test/fixtures/pylint/useless_else_on_loop.py

@@ -75,7 +75,7 @@ def test_break_in_orelse_deep():
 
 
 def test_break_in_orelse_deep2():
-    """should rise a useless-else-on-loop message, as the break statement is only
+    """should raise a useless-else-on-loop message, as the break statement is only
     for the inner for loop
     """
     for _ in range(10):
@@ -101,3 +101,15 @@ def test_break_in_orelse_deep3():
     else:
         return True
     return False
+
+
+def test_break_in_if_orelse():
+    """should raise a useless-else-on-loop message due to break in else"""
+    for _ in range(10):
+        if 1 < 2:  # pylint: disable=comparison-of-constants
+            pass
+        else:
+            break
+    else:
+        return True
+    return False

src/pylint/plugins/useless_else_on_loop.rs

@@ -7,7 +7,7 @@ use crate::Check;
 
 fn loop_exits_early(body: &[Stmt]) -> bool {
     body.iter().any(|stmt| match &stmt.node {
-        StmtKind::If { body, .. } => loop_exits_early(body),
+        StmtKind::If { body, orelse, .. } => loop_exits_early(body) || loop_exits_early(orelse),
         StmtKind::Try {
             body,
             handlers,
@@ -16,11 +16,11 @@ fn loop_exits_early(body: &[Stmt]) -> bool {
             ..
         } => {
             loop_exits_early(body)
+                || loop_exits_early(orelse)
+                || loop_exits_early(finalbody)
                 || handlers.iter().any(|handler| match &handler.node {
                     ExcepthandlerKind::ExceptHandler { body, .. } => loop_exits_early(body),
                 })
-                || loop_exits_early(orelse)
-                || loop_exits_early(finalbody)
         }
         StmtKind::For { orelse, .. }
         | StmtKind::AsyncFor { orelse, .. }