1 error: format argument must be a string literal
2 --> $DIR/issue-86865.rs:4:14
7 | help: consider removing the leading `b`
9 error: format argument must be a string literal
10 --> $DIR/issue-86865.rs:8:15
12 LL | write!(s, b"foo{}", "bar");
15 | help: consider removing the leading `b`
17 error: aborting due to 2 previous errors