Hangs when line just contains backslash

[mowat27]

---

Python Code

# in file breaks_autopep.py
import sys
\
def f():
    pass

Command Line and Configuration

.pep8, setup.cfg, ...

N/A - default settings

[pep8]

N/A - default settings

Command Line

$ autopep8 -v --in-place --aggressive breaks_autopep.py
[file:tmp/breaks_autopep.py]
--->  Applying global fix for E265
--->  Applying global fix for E231
--->  Applying global fix for E721
--->  Applying global fix for W601
--->  Applying global fix for W603
--->  Applying global fix for W604
--->  Applying global fix for W690
--->  1 issue(s) to fix {'E302': {3}}
--->  2 issue(s) to fix {'E302': {5}, 'E122': {5}}
--->  2 issue(s) to fix {'E302': {7}, 'E122': {7}}
--->  2 issue(s) to fix {'E302': {9}, 'E122': {9}}
--->  2 issue(s) to fix {'E302': {11}, 'E122': {11}}
--->  2 issue(s) to fix {'E302': {13}, 'E122': {13}}
--->  2 issue(s) to fix {'E302': {15}, 'E122': {15}}
--->  2 issue(s) to fix {'E302': {17}, 'E122': {17}}
--->  2 issue(s) to fix {'E302': {19}, 'E122': {19}}
--->  2 issue(s) to fix {'E302': {21}, 'E122': {21}}
--->  2 issue(s) to fix {'E302': {23}, 'E122': {23}}
--->  2 issue(s) to fix {'E302': {25}, 'E122': {25}}
--->  2 issue(s) to fix {'E302': {27}, 'E122': {27}}
--->  2 issue(s) to fix {'E302': {29}, 'E122': {29}}
--->  2 issue(s) to fix {'E302': {31}, 'E122': {31}}
--->  2 issue(s) to fix {'E302': {33}, 'E122': {33}}
--->  2 issue(s) to fix {'E302': {35}, 'E122': {35}}
--->  2 issue(s) to fix {'E302': {37}, 'E122': {37}}
--->  2 issue(s) to fix {'E302': {39}, 'E122': {39}}
--->  2 issue(s) to fix {'E302': {41}, 'E122': {41}}
# ...
# and so on and on and on....

Your Environment

• Python version: Python 3.8.2
• autopep8 version: autopep8 1.5.1 (pycodestyle: 2.5.0)
• Platform: MacOS 10.15.2

[hhatto]

Thanks for bug reporting.

fix in latest master.
We will be releasing 1.5.3 at the end of May.