build: remove panic message dependency

Cargo.lock

@@ -3847,7 +3847,6 @@ dependencies = [
  "nokhwa",
  "openpnp_capture_sys",
  "openssl-sys",
- "panic-message",
  "parking_lot 0.12.3",
  "qrcode",
  "qrcodegen",
@@ -6587,12 +6586,6 @@ dependencies = [
  "sha2 0.10.8",
 ]
 
-[[package]]
-name = "panic-message"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "384e52fd8fbd4cbe3c317e8216260c21a0f9134de108cea8a4dd4e7e152c472d"
-
 [[package]]
 name = "parking"
 version = "2.2.0"

Cargo.toml

@@ -52,7 +52,6 @@ rust-i18n = "2.3.1"
 
 ## other
 backtrace = "0.3"
-panic-message = "0.3.0"
 thiserror = "1.0.58"
 futures = "0.3"
 dirs = "5.0.1"

src/main.rs

@@ -48,7 +48,7 @@ fn real_main() {
         let time = grim::gui::views::View::format_time(chrono::Utc::now().timestamp());
         let target = egui::os::OperatingSystem::from_target_os();
         let ver = grim::VERSION;
-        let msg = panic_message::panic_info_message(info);
+        let msg = panic_info_message(info);
         let err = format!("{} - {:?} - v{}\n\n{}\n\n{:?}", time, target, ver, msg, backtrace);
         // Save backtrace to file.
         let log = grim::Settings::crash_report_path();
@@ -76,6 +76,20 @@ fn real_main() {
     }
 }
 
+/// Get panic message from crash payload.
+fn panic_info_message<'pi>(panic_info: &'pi std::panic::PanicInfo<'_>) -> &'pi str {
+    let payload = panic_info.payload();
+    // taken from: https://github.com/rust-lang/rust/blob/4b9f4b221b92193c7e95b1beb502c6eb32c3b613/library/std/src/panicking.rs#L194-L200
+    match payload.downcast_ref::<&'static str>() {
+        Some(msg) => *msg,
+        None => match payload.downcast_ref::<String>() {
+            Some(msg) => msg.as_str(),
+            // Copy what rustc does in the default panic handler
+            None => "Box<dyn Any>",
+        },
+    }
+}
+
 /// Start GUI with Desktop related setup passing data from opening.
 #[allow(dead_code)]
 #[cfg(not(target_os = "android"))]