Don't dist miri on stable or beta.

ehuss · Mark-Simulacrum · commit c064a3120699 · 2021-06-23T10:18:57.000-04:00
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
@@ -1171,6 +1171,9 @@ impl Step for Miri {
     }
 
     fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {
+        if !builder.build.unstable_features() {
+            return None;
+        }
         let compiler = self.compiler;
         let target = self.target;
         assert!(builder.config.extended);

Original file line number	Diff line number	Diff line change
`@@ -1171,6 +1171,9 @@ impl Step for Miri {`
`1171`	`1171`	`}`
`1172`	`1172`
`1173`	`1173`	`fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {`
	`1174`	`+ if !builder.build.unstable_features() {`
	`1175`	`+ return None;`
	`1176`	`+ }`
`1174`	`1177`	`let compiler = self.compiler;`
`1175`	`1178`	`let target = self.target;`
`1176`	`1179`	`assert!(builder.config.extended);`