Cannot format variables named "display" or "debug" with tracing macros

[finnbear]

Bug Report

Version

tracing 0.1.37 (latest)

Platform

Linux

Description

When porting from eprintln! to tracing::trace!, my use of the variable name display caused a compile error. I had to change it to to_display. I've tested and the same occurs for debug.

extern crate tracing;

fn main() {
    let display = String::from("message");
    tracing::trace!("{display}");
}

error[[E0277]](https://doc.rust-lang.org/stable/error_codes/E0277.html): `fn(_) -> DisplayValue<_> {display::<_>}` doesn't implement `std::fmt::Display`
 --> src/main.rs:5:22
  |
5 |     tracing::trace!("{display}");
  |                      ^^^^^^^^^ `fn(_) -> DisplayValue<_> {display::<_>}` cannot be formatted with the default formatter
  |
  = help: the trait `std::fmt::Display` is not implemented for fn item `fn(_) -> DisplayValue<_> {display::<_>}`
  = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
  = note: this error originates in the macro `format_args` which comes from the expansion of the macro `tracing::trace` (in Nightly builds, run with -Z macro-backtrace for more info)

Rust playground

[hawkw]

See #2332 for some background on this unfortunate situation.

[finnbear]

Thanks, closing as duplicate!