| error: 1 positional argument in format string, but no arguments were given | |
| --> $DIR/macro-backtrace-println.rs:14:30 | |
| | | |
| LL | ($fmt:expr) => (myprint!(concat!($fmt, "\n"))); | |
| | ^^^^^^^^^^^^^^^^^^^ | |
| ... | |
| LL | myprintln!("{}"); | |
| | ---------------- in this macro invocation | |
| | | |
| = note: this error originates in the macro `concat` which comes from the expansion of the macro `myprintln` (in Nightly builds, run with -Z macro-backtrace for more info) | |
| error: aborting due to 1 previous error | |