lang: fix owner compile error caused by missing type annotation (#1648)

CHANGELOG.md

@@ -28,10 +28,11 @@ incremented for features.
 * ts: Fix the loss of strict typing using the `methods` namespace on builder functions ([#1539](https://github.com/project-serum/anchor/pull/1539)).
 * spl: Update `spl/governance` to use new errors ([#1582](https://github.com/project-serum/anchor/pull/1582)).
 * client: Fix `Cluster`'s `FromStr` implementation ([#1362](https://github.com/project-serum/anchor/pull/1362)).
-* lang: implement `Key` for `Pubkey` again, so `associated_token::*` constraints can use pubkey targets again ([#1601](https://github.com/project-serum/anchor/pull/1601)).
-* lang: adjust error code so `#[error_code]` works with just importing `anchor_lang::error_code` ([#1610](https://github.com/project-serum/anchor/pull/1610)).
-* ts: fix `spl-token` coder account parsing ([#1604](https://github.com/project-serum/anchor/pull/1604)).
-* cli: fix `npm install` fallback if `yarn` install doesn't work ([#1643](https://github.com/project-serum/anchor/pull/1643)).
+* lang: Implement `Key` for `Pubkey` again, so `associated_token::*` constraints can use pubkey targets again ([#1601](https://github.com/project-serum/anchor/pull/1601)).
+* lang: Adjust error code so `#[error_code]` works with just importing `anchor_lang::error_code` ([#1610](https://github.com/project-serum/anchor/pull/1610)).
+* ts: Fix `spl-token` coder account parsing ([#1604](https://github.com/project-serum/anchor/pull/1604)).
+* cli: Fix `npm install` fallback if `yarn` install doesn't work ([#1643](https://github.com/project-serum/anchor/pull/1643)).
+* lang: Fix bug where `owner = <target>` would not compile because of missing type annotation ([#1648](https://github.com/project-serum/anchor/pull/1648)).
 
 ### Breaking
 

lang/syn/src/codegen/accounts/constraints.rs

@@ -282,7 +282,7 @@ pub fn generate_constraint_owner(f: &Field, c: &ConstraintOwner) -> proc_macro2:
     );
     quote! {
         {
-            let my_owner = #ident.as_ref().owner;
+            let my_owner = AsRef::<AccountInfo>::as_ref(&#ident).owner;
             let owner_address = #owner_address;
             if my_owner != &owner_address {
                 return #error;
@@ -379,7 +379,7 @@ fn generate_constraint_init_group(f: &Field, c: &ConstraintInitGroup) -> proc_ma
                 #find_pda
 
                 let #field: #ty_decl = {
-                    if !#if_needed || #field.as_ref().owner == &anchor_lang::solana_program::system_program::ID {
+                    if !#if_needed || AsRef::<AccountInfo>::as_ref(&#field).owner == &anchor_lang::solana_program::system_program::ID {
                         // Define payer variable.
                         #payer
 
@@ -417,7 +417,7 @@ fn generate_constraint_init_group(f: &Field, c: &ConstraintInitGroup) -> proc_ma
                 #find_pda
 
                 let #field: #ty_decl = {
-                    if !#if_needed || #field.as_ref().owner == &anchor_lang::solana_program::system_program::ID {
+                    if !#if_needed || AsRef::<AccountInfo>::as_ref(&#field).owner == &anchor_lang::solana_program::system_program::ID {
                         #payer
 
                         let cpi_program = associated_token_program.to_account_info();
@@ -470,7 +470,7 @@ fn generate_constraint_init_group(f: &Field, c: &ConstraintInitGroup) -> proc_ma
                 #find_pda
 
                 let #field: #ty_decl = {
-                    if !#if_needed || #field.as_ref().owner == &anchor_lang::solana_program::system_program::ID {
+                    if !#if_needed || AsRef::<AccountInfo>::as_ref(&#field).owner == &anchor_lang::solana_program::system_program::ID {
                         // Define payer variable.
                         #payer
 
@@ -765,7 +765,7 @@ pub fn generate_constraint_state(f: &Field, c: &ConstraintState) -> proc_macro2:
         if #ident.key() != anchor_lang::accounts::cpi_state::CpiState::<#account_ty>::address(&#program_target.key()) {
             return Err(anchor_lang::error::Error::from(anchor_lang::error::ErrorCode::ConstraintState).with_account_name(#name_str));
         }
-        if #ident.as_ref().owner != &#program_target.key() {
+        if AsRef::<AccountInfo>::as_ref(&#ident).owner != &#program_target.key() {
             return Err(anchor_lang::error::Error::from(anchor_lang::error::ErrorCode::ConstraintState).with_account_name(#name_str));
         }
     }