Merge pull request #295 from thalesmg/better-error-msg1

chore: add more info to errors

src/hocon_schema.erl

@@ -275,11 +275,23 @@ fields(Sc, Name) ->
 -spec fields_and_meta(schema(), name()) -> fields().
 fields_and_meta(Mod, Name) when is_atom(Mod) ->
     Meta =
-        case Mod:fields(Name) of
+        try Mod:fields(Name) of
             Fields when is_list(Fields) ->
                 maybe_add_desc(Mod, Name, #{fields => Fields});
             Fields ->
                 ensure_struct_meta(Fields)
+        catch
+            K:E:S ->
+                erlang:raise(
+                    K,
+                    #{
+                        error => "failed to resolve schema",
+                        cause => E,
+                        schema_module => Mod,
+                        struct_name => Name
+                    },
+                    S
+                )
         end,
     Meta#{tags => tags(Mod)};
 fields_and_meta(#{fields := Fields}, Name) when is_function(Fields) ->
@@ -290,11 +302,23 @@ fields_and_meta(#{fields := Fields}, Name) when is_map(Fields) ->
 maybe_add_desc(Mod, Name, Meta) ->
     case erlang:function_exported(Mod, desc, 1) of
         true ->
-            case Mod:desc(Name) of
+            try Mod:desc(Name) of
                 undefined ->
                     Meta;
                 Desc ->
                     Meta#{desc => Desc}
+            catch
+                K:E:S ->
+                    erlang:raise(
+                        K,
+                        #{
+                            error => "failed to resolve struct description",
+                            cause => E,
+                            schema_module => Mod,
+                            struct_name => Name
+                        },
+                        S
+                    )
             end;
         false ->
             Meta