[Bug c/103881] Wconversion false positive when using |= and &= with two rvalues in binary op

[thomas at habets dot se via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103881

--- Comment #1 from thomas at habets dot se ---
I just reproduced this from git HEAD, as seen on github (commit
e3cbb8c66c930ba738674b0fcf29848dc3ecfef2), with latest commit today,
2021-12-31.