From 78f4c0456f462d91c2ebabd83ea871fa020429e1 Mon Sep 17 00:00:00 2001
From: 0xPoe <techregister@pm.me>
Date: Tue, 24 Feb 2026 08:53:25 +0100
Subject: [PATCH] test: add the workspace search error case

Signed-off-by: 0xPoe <techregister@pm.me>

fix

Signed-off-by: 0xPoe <techregister@pm.me>
---
 tests/testsuite/workspaces.rs | 36 ++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/tests/testsuite/workspaces.rs b/tests/testsuite/workspaces.rs
index 0f8ab785b..bbafc31eb 100644
--- a/tests/testsuite/workspaces.rs
+++ b/tests/testsuite/workspaces.rs
@@ -6,7 +6,10 @@ use std::fs;
 use crate::prelude::*;
 use cargo_test_support::registry::Package;
 use cargo_test_support::str;
-use cargo_test_support::{basic_lib_manifest, basic_manifest, git, project, sleep_ms};
+use cargo_test_support::{
+    ProjectBuilder, basic_lib_manifest, basic_manifest, git, paths, project, project_in_home,
+    sleep_ms,
+};
 
 #[cargo_test]
 fn simple_explicit() {
@@ -2198,6 +2201,37 @@ fn cargo_home_at_root_works() {
     p.cargo("check --frozen").env("CARGO_HOME", p.root()).run();
 }
 
+#[cargo_test]
+fn parent_manifest_error_mentions_workspace_search() {
+    ProjectBuilder::new(paths::home())
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "home-manifest"
+                version = "0.1.0"
+                authors = []
+            "#,
+        )
+        .build();
+
+    let p = project_in_home("stuff")
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr_data(str![[r#"
+[ERROR] failed to parse manifest at `[ROOT]/home/Cargo.toml`
+
+Caused by:
+  no targets specified in the manifest
+  either src/lib.rs, src/main.rs, a [lib] section, or [[bin]] section must be present
+
+"#]])
+        .run();
+}
+
 #[cargo_test]
 fn relative_rustc() {
     let p = project()