1 files changed, 9 insertions, 4 deletions
diff --git a/library/std/src/backtrace/tests.rs b/library/std/src/backtrace/tests.rs
index 4dfbf88e8..73543a3af 100644
--- a/library/std/src/backtrace/tests.rs
+++ b/library/std/src/backtrace/tests.rs
@@ -1,4 +1,5 @@
 use super::*;
+use crate::panic::{RefUnwindSafe, UnwindSafe};
 
 fn generate_fake_frames() -> Vec<BacktraceFrame> {
     vec![
@@ -43,9 +44,8 @@ fn generate_fake_frames() -> Vec<BacktraceFrame> {
 #[test]
 fn test_debug() {
     let backtrace = Backtrace {
-        inner: Inner::Captured(LazilyResolvedCapture::new(Capture {
+        inner: Inner::Captured(LazyLock::preinit(Capture {
             actual_start: 1,
-            resolved: true,
             frames: generate_fake_frames(),
         })),
     };
@@ -66,9 +66,8 @@ fn test_debug() {
 #[test]
 fn test_frames() {
     let backtrace = Backtrace {
-        inner: Inner::Captured(LazilyResolvedCapture::new(Capture {
+        inner: Inner::Captured(LazyLock::preinit(Capture {
             actual_start: 1,
-            resolved: true,
             frames: generate_fake_frames(),
         })),
     };
@@ -93,3 +92,9 @@ fn test_frames() {
 
     assert!(iter.all(|(f, e)| format!("{f:#?}") == *e));
 }
+
+#[test]
+fn backtrace_unwind_safe() {
+    fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {}
+    assert_unwind_safe::<Backtrace>();
+}