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bug#36484: c-mode hangs on macro with comment
From: |
Nicholas Drozd |
Subject: |
bug#36484: c-mode hangs on macro with comment |
Date: |
Tue, 2 Jul 2019 19:36:52 -0500 |
Here's a simple C program:
#define x /***/5
int main(void) {
return x;
}
`gcc -Wall` compiles it without any warnings, but opening it causes
Emacs to hang, and sometimes even to freeze hard.
It has something to do with the macro, but I haven't been able to
figure out exactly what's going on.
Here's a test function with an even smaller reproducing example:
(defun c-mode-hang ()
(interactive)
(with-temp-buffer
(insert "#define /***/5")
(c-mode)))
Running that function under the profiler suggests that the problem is
in `c-end-of-macro`:
- c-extend-region-for-CPP 13869 98%
- c-end-of-macro 10470 74%
c-forward-single-comment 2759 19%
This may have something to do with commit 39acaf, or maybe 6b5388.
GNU Emacs 27.0.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
of 2019-06-30
- bug#36484: c-mode hangs on macro with comment,
Nicholas Drozd <=
- Message not available