[Bug c/122555] error: variable '' set but not used [-Werror=unused-but-set-variable=]

[rudi at heitbaum dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122555

--- Comment #2 from rudi at heitbaum dot com ---
Thanks Andrew - you are right. I have raised a bug on Mozilla.
https://bugzilla.mozilla.org/show_bug.cgi?id=1998094