1 files changed, 83 insertions, 0 deletions
diff --git a/src/tools/cargo/tests/testsuite/patch.rs b/src/tools/cargo/tests/testsuite/patch.rs
index a467f60b5..a4522e822 100644
--- a/src/tools/cargo/tests/testsuite/patch.rs
+++ b/src/tools/cargo/tests/testsuite/patch.rs
@@ -2700,3 +2700,86 @@ perhaps a crate was updated and forgotten to be re-vendored?"#,
         )
         .run();
 }
+
+#[cargo_test]
+fn from_config_empty() {
+    Package::new("bar", "0.1.0").publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [dependencies]
+                bar = "0.1.0"
+            "#,
+        )
+        .file(
+            ".cargo/config.toml",
+            r#"
+                [patch.'']
+                bar = { path = 'bar' }
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.1"))
+        .file("bar/src/lib.rs", r#""#)
+        .build();
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] [patch] entry `` should be a URL or registry name
+
+Caused by:
+  invalid url ``: relative URL without a base
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn from_manifest_empty() {
+    Package::new("bar", "0.1.0").publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [dependencies]
+                bar = "0.1.0"
+
+                [patch.'']
+                bar = { path = 'bar' }
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.1"))
+        .file("bar/src/lib.rs", r#""#)
+        .build();
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] failed to parse manifest at `[CWD]/Cargo.toml`
+
+Caused by:
+  [patch] entry `` should be a URL or registry name
+
+Caused by:
+  invalid url ``: relative URL without a base
+",
+        )
+        .run();
+}