Make the dependency specification ambiguous be an error

Signed-off-by: hi-rustin <[email protected]>

Author: Rustin170506

src/cargo/util/toml/mod.rs

@@ -1791,13 +1791,11 @@ impl<P: ResolveToPath> DetailedTomlDependency<P> {
             ),
             (Some(git), maybe_path, _, _) => {
                 if maybe_path.is_some() {
-                    let msg = format!(
+                    bail!(
                         "dependency ({}) specification is ambiguous. \
-                         Only one of `git` or `path` is allowed. \
-                         This will be considered an error in future versions",
+                         Only one of `git` or `path` is allowed.",
                         name_in_toml
                     );
-                    cx.warnings.push(msg)
                 }
 
                 let n_details = [&self.branch, &self.tag, &self.rev]

tests/testsuite/bad_config.rs

@@ -1112,11 +1112,12 @@ fn both_git_and_path_specified() {
 
     foo.cargo("build -v")
         .with_status(101)
-        .with_stderr_contains(
+        .with_stderr(
             "\
-[WARNING] dependency (bar) specification is ambiguous. \
-Only one of `git` or `path` is allowed. \
-This will be considered an error in future versions
+error: failed to parse manifest at `[..]`
+
+Caused by:
+  dependency (bar) specification is ambiguous. Only one of `git` or `path` is allowed.
 ",
         )
         .run();