macros fail when format_args is defined in scope

[konstin]

Bug Report

Playground example

We have a custom format_args macro in scope. This causes e.g. warn! to fail:

macro_rules! format_args {
    () => {}
}

fn main() {
    tracing::warn!("oops");
}

error: no rules expected the token `"oops"`
 --> src/main.rs:6:20
  |
1 | macro_rules! format_args {
  | ------------------------ when calling this macro
...
6 |     tracing::warn!("oops");
  |                    ^^^^^^ no rules expected this token in macro call
  |
  = note: while trying to match end of macro

This is caused by format_args! being used in tracing's macros.rs without a qualification to std.

Version

tracing 0.1.37

Platform

n/a