Bumped backtrace minimum version an use Debug formatter.

azriel91 · azriel91 · commit 392fde746f6a · 2018-12-12T11:23:47.000+13:00
See rust-lang-deprecated#279
diff --git a/Cargo.toml b/Cargo.toml
@@ -15,7 +15,7 @@ path = "./failure_derive"
 
 [dependencies.backtrace]
 optional = true
-version = "0.3.3"
+version = "0.3.11"
 
 [workspace]
 members = [".", "failure_derive"]
diff --git a/src/backtrace/mod.rs b/src/backtrace/mod.rs
@@ -137,7 +137,7 @@ with_backtrace! {
     impl Display for Backtrace {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             if let Some(bt) = self.internal.as_backtrace() {
-                Display::fmt(bt, f)
+                Debug::fmt(bt, f)
             } else { Ok(()) }
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -137,7 +137,7 @@ with_backtrace! {`
`137`	`137`	`impl Display for Backtrace {`
`138`	`138`	`fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {`
`139`	`139`	`if let Some(bt) = self.internal.as_backtrace() {`
`140`		`- Display::fmt(bt, f)`
	`140`	`+ Debug::fmt(bt, f)`
`141`	`141`	`} else { Ok(()) }`
`142`	`142`	`}`
`143`	`143`	`}`