Fix panic on 'wasm32-unknown-unknown' target (#1)

See: rust-lang/rust#64450

Author: alexlapa

Cargo.toml

@@ -17,7 +17,7 @@ include = ["/src/", "/Cargo.toml", "/CHANGELOG.md", "/LICENSE.md", "/README.md"]
 features = ["failure"]
 
 [dependencies]
-dm = { version = "0.99.2", package = "derive_more" }
+derive_more = "0.99.2"
 [dependencies.failure]
     version = "0.1.6"
     optional = true

src/lib.rs

@@ -72,6 +72,7 @@ use std::{
     sync::atomic::{AtomicUsize, Ordering},
 };
 
+use derive_more as dm;
 #[cfg(feature = "failure")]
 use failure::Fail;
 

src/trace.rs

@@ -5,6 +5,8 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
+use derive_more as dm;
+
 /// Captured frame of [`Trace`].
 #[derive(Clone, Copy, Debug, dm::Display)]
 #[display(fmt = "{}\n  at {}:{}", module, file, line)]