recognize feature dependency cycles as a broken manifest

Author: Skgland

src/prepare.rs

@@ -158,6 +158,7 @@ fn run_command(cmd: Command) -> anyhow::Result<()> {
             missing_deps = true;
         } else if line.contains("failed to parse manifest at")
             || line.contains("error: invalid table header")
+            || line.contains("error: cyclic feature dependency: feature ")
         {
             broken_deps = true;
         } else if line.contains("error: failed to parse lock file at") {

tests/buildtest/mod.rs

@@ -289,7 +289,7 @@ test_prepare_error_stderr!(
     "error: no matching package found"
 );
 
-test_prepare_unknown_err!(
+test_prepare_error_stderr!(
     test_invalid_cargotoml_cyclic_feature,
     "invalid-cargotoml-cyclic-feature",
     BrokenDependencies,