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Better error message for #[napi(catch_unwind)] #1383

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merged 1 commit into from Dec 9, 2022
Merged

Better error message for #[napi(catch_unwind)] #1383

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13 changes: 12 additions & 1 deletion crates/backend/src/codegen/fn.rs
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Expand Up @@ -140,7 +140,18 @@ impl TryToTokens for NapiFn {
quote! {
{
std::panic::catch_unwind(|| { #function_call })
.map_err(|e| napi::Error::new(napi::Status::GenericFailure, format!("{:?}", e)))
.map_err(|e| {
let message = {
if let Some(string) = e.downcast_ref::<String>() {
string.clone()
} else if let Some(string) = e.downcast_ref::<&str>() {
string.to_string()
} else {
format!("panic from Rust code: {:?}", e)
}
};
napi::Error::new(napi::Status::GenericFailure, message)
})
.and_then(|r| r)
}
}
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