fix -Zast-json to properly output the 'id' field

JOE1994 · JOE1994 · commit 3211b8313407 · 2020-04-17T22:47:26.000-04:00
diff --git a/src/librustc_ast/ast.rs b/src/librustc_ast/ast.rs
@@ -2212,8 +2212,8 @@ rustc_index::newtype_index! {
 }
 
 impl rustc_serialize::Encodable for AttrId {
-    fn encode<S: Encoder>(&self, _: &mut S) -> Result<(), S::Error> {
-        Ok(())
+    fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
+        s.emit_unit()
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -2212,8 +2212,8 @@ rustc_index::newtype_index! {`
`2212`	`2212`	`}`
`2213`	`2213`
`2214`	`2214`	`impl rustc_serialize::Encodable for AttrId {`
`2215`		`- fn encode<S: Encoder>(&self, _: &mut S) -> Result<(), S::Error> {`
`2216`		`- Ok(())`
	`2215`	`+ fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {`
	`2216`	`+ s.emit_unit()`
`2217`	`2217`	`}`
`2218`	`2218`	`}`
`2219`	`2219`