1 files changed, 106 insertions, 0 deletions
diff --git a/third_party/rust/thiserror/tests/test_option.rs b/third_party/rust/thiserror/tests/test_option.rs
new file mode 100644
index 0000000000..ca21713852
--- /dev/null
+++ b/third_party/rust/thiserror/tests/test_option.rs
@@ -0,0 +1,106 @@
+#![cfg_attr(thiserror_nightly_testing, feature(backtrace))]
+#![deny(clippy::all, clippy::pedantic)]
+
+#[cfg(thiserror_nightly_testing)]
+pub mod structs {
+    use std::backtrace::Backtrace;
+    use thiserror::Error;
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct OptSourceNoBacktrace {
+        #[source]
+        source: Option<anyhow::Error>,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct OptSourceAlwaysBacktrace {
+        #[source]
+        source: Option<anyhow::Error>,
+        backtrace: Backtrace,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct NoSourceOptBacktrace {
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct AlwaysSourceOptBacktrace {
+        source: anyhow::Error,
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct OptSourceOptBacktrace {
+        #[source]
+        source: Option<anyhow::Error>,
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+}
+
+#[cfg(thiserror_nightly_testing)]
+pub mod enums {
+    use std::backtrace::Backtrace;
+    use thiserror::Error;
+
+    #[derive(Error, Debug)]
+    pub enum OptSourceNoBacktrace {
+        #[error("...")]
+        Test {
+            #[source]
+            source: Option<anyhow::Error>,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum OptSourceAlwaysBacktrace {
+        #[error("...")]
+        Test {
+            #[source]
+            source: Option<anyhow::Error>,
+            backtrace: Backtrace,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum NoSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum AlwaysSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            source: anyhow::Error,
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum OptSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            #[source]
+            source: Option<anyhow::Error>,
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+}
+
+#[test]
+#[cfg_attr(not(thiserror_nightly_testing), ignore)]
+fn test_option() {}