Internal error when formatting a with statement with #fmt off

[ikriv]

Internal error when formatting certain 'with' statements.
formatter_error_sample.py.txt

To Reproduce Steps to reproduce the behavior:

1. Take attached file 'formatter_error_sample.py' (remove the .txt extension)
2. Run Black on it with no arguments (black formatter_error_sample.py)
3. See error: INTERNAL ERROR

Expected behavior No internal error, some formatted output

Environment (please complete the following information):

• Version: black.linux, version 19.3b0+86.g48afd8
• OS and Python version: [e.g. Linux/Python 3.7.5+]

Does this bug also happen on master? yes, verified online

[ichard26]

Thanks for the report @ikriv! This appears to be a duplicate of #1286 (which is just another example of #569). Over-indented code generation due to fmt: off applying after of an indented block is what #569 is all about. That's what we see in the diff when disabling Black's safety checks:

(black) ichard26@acer-ubuntu:~/programming/oss/black$ black temp.py --diff --color --fast
--- temp.py	2020-10-02 19:25:32.003590 +0000
+++ temp.py	2020-10-02 19:41:06.710511 +0000
@@ -3,7 +3,7 @@
         # fmt: off
         with some_long_expression_here(that_would_break_line),\
              some_other_expression():
         # fmt: on
             pass
-    def c() -> None:
-        pass
+        def c() -> None:
+            pass
would reformat temp.py
All done! ✨ 🍰 ✨
1 file would be reformatted.

My environment

• Black version: master (283d999)
• Python version: CPython 3.8.5
• OS version: Ubuntu 20.04.01 LTS