fix: init: macro hygiene bug

Signed-off-by: Mirko Adzic <adzicmirko97@gmail.com>

Author: Mirko-A

internal/src/init.rs

@@ -240,22 +240,23 @@ fn init_fields(
         };
         let init = match kind {
             InitializerKind::Value { ident, value } => {
-                let (value_ident, value_prep) = match value.as_ref() {
+                let (value_prep, value_ident) = match value.as_ref() {
                     None => {
                         // This is of short-hand syntax, so just use the identifier directly.
-                        (ident.clone(), None)
+                        (None, ident.clone())
                     }
                     Some((_, value)) => {
                         // We have an expression. Evaluate it to a local variable first, outside
                         // `unsafe {}` block.
                         //
                         // Setting the span of `value_ident` to `value`'s span improves error messages
                         // when the type of `value` is wrong.
+                        let value_ident = format_ident!("value", span = value.span());
                         (
-                            format_ident!("value", span = value.span()),
                             Some(quote! {
-                                let value = #value;
+                                let #value_ident = #value;
                             }),
+                            value_ident,
                         )
                     }
                 };