Add assert that fallback targets must be available.

rust-lang · Jan 19, 2022 · c8e6889 · c8e6889
1 parent 6a1099c
commit c8e6889
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs
@@ -536,7 +536,10 @@ impl Builder {
             }
             for (substr, fallback_target) in fallback {
                 if target_name.contains(substr) {
-                    return Target::from_compressed_tar(self, &tarball_name!(fallback_target));
+                    let t = Target::from_compressed_tar(self, &tarball_name!(fallback_target));
+                    // Fallbacks must always be available.
+                    assert!(t.available);
+                    return t;
                 }
             }
             Target::unavailable()