fix up an unwanted compiler error

KodrAus · KodrAus · commit 6a966d70d8a2 · 2023-08-11T19:05:22.000+10:00
diff --git a/tests/compile-fail/bitflags_custom_bits.rs b/tests/compile-fail/bitflags_custom_bits.rs
@@ -125,7 +125,7 @@ impl ParseHex for MyInt {
 
 impl WriteHex for MyInt {
     fn write_hex<W: fmt::Write>(&self, writer: W) -> fmt::Result {
-        LowerHex::fmt(&self.0, writer)
+        write!(writer, "{:x}", self.0)
     }
 }
 
diff --git a/tests/compile-fail/bitflags_custom_bits.stderr b/tests/compile-fail/bitflags_custom_bits.stderr
@@ -19,18 +19,3 @@ note: required by a bound in `PublicFlags::Primitive`
     |
     |     type Primitive: Primitive;
     |                     ^^^^^^^^^ required by this bound in `PublicFlags::Primitive`
-
-error[E0308]: mismatched types
-   --> tests/compile-fail/bitflags_custom_bits.rs:128:32
-    |
-127 |     fn write_hex<W: fmt::Write>(&self, writer: W) -> fmt::Result {
-    |                  - this type parameter
-128 |         LowerHex::fmt(&self.0, writer)
-    |         -------------          ^^^^^^ expected `&mut Formatter<'_>`, found type parameter `W`
-    |         |
-    |         arguments to this function are incorrect
-    |
-    = note: expected mutable reference `&mut Formatter<'_>`
-                  found type parameter `W`
-note: method defined here
-   --> $RUST/core/src/fmt/mod.rs

Original file line number	Diff line number	Diff line change
`@@ -125,7 +125,7 @@ impl ParseHex for MyInt {`
`125`	`125`
`126`	`126`	`impl WriteHex for MyInt {`
`127`	`127`	`fn write_hex<W: fmt::Write>(&self, writer: W) -> fmt::Result {`
`128`		`- LowerHex::fmt(&self.0, writer)`
	`128`	`+ write!(writer, "{:x}", self.0)`
`129`	`129`	`}`
`130`	`130`	`}`
`131`	`131`