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Better error when a proc macro panics

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This commit is contained in:
Jonas Schievink 2020-12-08 19:43:58 +01:00
parent b3ceee2a27
commit 6c4d5164d9
1 changed files with 2 additions and 1 deletions
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3
crates/proc_macro_srv/src/lib.rs
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@ -40,7 +40,8 @@ impl ProcMacroSrv {
match expander.expand(&task.macro_name, &task.macro_body, task.attributes.as_ref()) {
Ok(expansion) => Ok(ExpansionResult { expansion }),
Err(msg) => {
Err(format!("Cannot perform expansion for {}: error {:?}", &task.macro_name, msg))
let msg = msg.as_str().unwrap_or("<unknown error>");
Err(format!("proc-macro panicked: {}", msg))
}
}
}