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-rw-r--r--compiler/rustc_errors/src/json.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_errors/src/json.rs b/compiler/rustc_errors/src/json.rs
index 3166768e9e2..77e4f9a0767 100644
--- a/compiler/rustc_errors/src/json.rs
+++ b/compiler/rustc_errors/src/json.rs
@@ -279,6 +279,7 @@ struct UnusedExterns<'a> {
 }
 
 impl Diagnostic {
+    /// Converts from `rustc_errors::DiagInner` to `Diagnostic`.
     fn from_errors_diagnostic(diag: crate::DiagInner, je: &JsonEmitter) -> Diagnostic {
         let args = to_fluent_args(diag.args.iter());
         let sugg = diag.suggestions.iter().flatten().map(|sugg| {