Fix invalid code in an omitted trailer on large expressions

Fixes #237

diff --git a/README.md b/README.md
index f3a9bb82c964f52ad4f3437e57904350472219fc..7038d9656cbc64e8239c9c73e77f513c47b1a6e6 100644 (file)
--- a/README.md
+++ b/README.md
@@ -654,7 +654,11 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 ### 18.5b1 (unreleased)
 
 * Python grammar pickle caches are stored with the formatting caches, making
-  *Black* work in environments where site-packages is not user-writable (#192).
+  *Black* work in environments where site-packages is not user-writable (#192)
+
+* fixed invalid code produced when standalone comments were present in a trailer
+  that was omitted from line splitting on a large expression (#237)
+
 
 ### 18.5b0
 

diff --git a/black.py b/black.py
index 46c64a317935952e956a982321afb35d1d3d1dfd..8d551640f365e8dd0072adc08cbb0452cad1c715 100644 (file)
--- a/black.py
+++ b/black.py
@@ -2606,6 +2606,9 @@ def generate_trailers_to_omit(line: Line, line_length: int) -> Iterator[Set[Leaf
         if length > line_length:
             break
 
+        if leaf.type == STANDALONE_COMMENT:
+            break
+
         optional_brackets.discard(id(leaf))
         if opening_bracket:
             if leaf is opening_bracket:

diff --git a/tests/composition.py b/tests/composition.py
index 71eee6a86cd3edcbe599e109e741233dc8d86786..f8cd5edb10677a8aa92b0c70ca3d4ff65a5ade8a 100644 (file)
--- a/tests/composition.py
+++ b/tests/composition.py
@@ -32,6 +32,14 @@ class C:
                         # Another
                     ):
                         print(i)
+        xxxxxxxxxxxxxxxx = Yyyy2YyyyyYyyyyy(
+            push_manager=context.request.resource_manager,
+            max_items_to_push=num_items,
+            batch_size=Yyyy2YyyyYyyyyYyyy.FULL_SIZE,
+        ).push(
+            # Only send the first n items.
+            items=items[:num_items]
+        )
         return (
             "Utterly failed doctest test for %s\n"
             '  File "%s", line %s, in %s\n\n%s'