https://llvm.org/bugs/show_bug.cgi?id=31092
Bug ID: 31092
Summary: clang-format Emacs integration breaks on Windows
Product: clang
Version: 3.9
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Formatter
Assignee: unassignedclangb...@nondot.org
Reporter: rom...@alazartech.com
CC: djas...@google.com, kli...@google.com,
llvm-bugs@lists.llvm.org
Classification: Unclassified
Running `clang-format-buffer` from clang-format.el on any file that contains
multiple lines under Windows throws an error, even if the file contains only
ASCII characters:
(clang-format failed with code 1: error: invalid length 34, offset + length
(34) is outside the file.)
The issues comes from the fact that Emacs uses `undecided-unix` encoding by
default to send data to subprocesses, but `undecided-dos` to receive data from
them, as shown by calling `describe-coding-system` on any buffer.
This problem can be fixed by calling `(setq default-process-coding-system
'(undecided-dos . undecided-dos))` in `.emacs`.
I am not sure if this issue can or should be solved at clang-format.el level,
but I thought it is worth pointing out since it affects every Emacs user on
Windows that hasn't fiddled with the `default-process-coding-system` variable.
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