Record update missing fields fix (#314)

Record update missing fields fix for type any

Author: Francois Brodeur

src/typechecker.erl

@@ -1513,7 +1513,7 @@ do_type_check_expr(Env, {record, Anno, Expr, Record, Fields}) ->
     RecTy = {type, erl_anno:new(0), record, [{atom, erl_anno:new(0), Record}]},
     {VB1, Cs1} = type_check_expr_in(Env, RecTy, Expr),
     Rec = get_record_fields(Record, Anno, Env#env.tenv),
-    {VB2, Cs2} = type_check_fields(Env, Rec, Fields),
+    {VB2, Cs2} = type_check_fields_for_update(Env, Rec, Fields),
     {RecTy, union_var_binds(VB1, VB2, Env#env.tenv), constraints:combine(Cs1, Cs2)};
 do_type_check_expr(Env, {record, Anno, Record, Fields}) ->
     RecTy    = {type, erl_anno:new(0), record, [{atom, erl_anno:new(0), Record}]},
@@ -1703,6 +1703,9 @@ create_fun_type(Arity, RetTy) when is_integer(Arity) ->
     ParTys = lists:duplicate(Arity, type(any)),
     type('fun', [type(product, ParTys), RetTy]).
 
+type_check_fields_for_update(Env, Rec, Fields) ->
+    type_check_fields(Env, Rec, Fields, should_not_be_inspected).
+
 type_check_fields(Env, Rec, Fields) ->
     UnAssignedFields = get_unassigned_fields(Fields, Rec),
     type_check_fields(Env, Rec, Fields, UnAssignedFields).

test/should_pass/records.erl

@@ -64,3 +64,13 @@ record_as_tuple(R) ->
 
 -record(rec_any, {f}).
 f(#rec_any{f = F} = R) -> F.
+
+-record(nospec_update_bug, {
+    a :: integer(),
+    b :: integer()
+}).
+
+nospec_update_bug(Rec) ->
+    Rec#nospec_update_bug{
+        b = 0
+    }.