fix(lints): Improve error message on bad data

Author: epage

src/cargo/util/toml/mod.rs

@@ -3499,7 +3499,7 @@ impl fmt::Debug for PathValue {
 }
 
 #[derive(Deserialize, Serialize, Debug, Clone)]
-#[serde(expecting = "a map")]
+#[serde(expecting = "a lints table")]
 pub struct MaybeWorkspaceLints {
     #[serde(skip_serializing_if = "is_false")]
     #[serde(deserialize_with = "bool_no_false", default)]

tests/testsuite/lints.rs

@@ -172,7 +172,7 @@ fn malformed_on_nightly() {
 error: failed to parse manifest[..]
 
 Caused by:
-  invalid type: integer `20`, expected a map
+  invalid type: integer `20`, expected a lints table
 ",
         )
         .run();