error[E0152]: found duplicate lang item `panic_impl` --> $DIR/panic-handler-std.rs:8:1 | LL | fn panic(info: PanicInfo) -> ! { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: the lang item is first defined in crate `std` (which `panic_handler_std` depends on) = note: first definition in `std` loaded from SYSROOT/libstd-*.rlib = note: second definition in the local crate (`panic_handler_std`) error: argument should be `&PanicInfo` --> $DIR/panic-handler-std.rs:8:16 | LL | fn panic(info: PanicInfo) -> ! { | ^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0152`.