From 7967f33ee06ba6e2f537ca51b0cdf29582f009ff Mon Sep 17 00:00:00 2001
From: Ary Borenszweig <asterite@gmail.com>
Date: Wed, 11 Dec 2024 16:19:24 -0300
Subject: [PATCH] Handle `panic!("...")` in catch_unwind handling

---
 tooling/nargo_cli/src/cli/test_cmd.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tooling/nargo_cli/src/cli/test_cmd.rs b/tooling/nargo_cli/src/cli/test_cmd.rs
index 488176c531..7ebf222e88 100644
--- a/tooling/nargo_cli/src/cli/test_cmd.rs
+++ b/tooling/nargo_cli/src/cli/test_cmd.rs
@@ -185,9 +185,15 @@ impl<'a> TestRunner<'a> {
                         let time_before_test = std::time::Instant::now();
                         let (status, output) = match catch_unwind(test.runner) {
                             Ok((status, output)) => (status, output),
-                            Err(_) => (
+                            Err(err) => (
                                 TestStatus::Fail {
-                                    message: "An unexpected error happened".to_string(),
+                                    message: 
+                                    // It seems `panic!("...")` makes the error be `&str`, so we handle this common case
+                                    if let Some(message) = err.downcast_ref::<&str>() {
+                                        message.to_string()
+                                    } else {
+                                        "An unexpected error happened".to_string()
+                                    },
                                     error_diagnostic: None,
                                 },
                                 String::new(),