diff --git a/benches/split_bench.rs b/benches/split_bench.rs
index e15b4e7..3ecfd90 100644
--- a/benches/split_bench.rs
+++ b/benches/split_bench.rs
@@ -1,4 +1,5 @@
-use criterion::{Criterion, black_box, criterion_group, criterion_main};
+use std::hint::black_box;
+use criterion::{Criterion, criterion_group, criterion_main};
 
 fn bench_split(c: &mut Criterion) {
     let input = "data_1";
diff --git a/src/data_provider/card_sets.rs b/src/data_provider/card_sets.rs
index 00f75fe..1e1e883 100644
--- a/src/data_provider/card_sets.rs
+++ b/src/data_provider/card_sets.rs
@@ -1,4 +1,4 @@
-use crate::lang::{DeckSettings, INVALID_ID, OrderMode};
+use crate::lang::{DeckSettings, OrderMode};
 
 use rusqlite::Connection;
 
diff --git a/src/data_provider/card_stats.rs b/src/data_provider/card_stats.rs
index 888f030..068612e 100644
--- a/src/data_provider/card_stats.rs
+++ b/src/data_provider/card_stats.rs
@@ -1,4 +1,4 @@
-use crate::lang::{CardStatistics, DeckSettings, INVALID_ID};
+use crate::lang::{CardStatistics, DeckSettings};
 use rusqlite::Connection;
 use std::time::Instant;
 
diff --git a/src/data_provider/words.rs b/src/data_provider/words.rs
index 0d3e649..e20eff5 100644
--- a/src/data_provider/words.rs
+++ b/src/data_provider/words.rs
@@ -1,5 +1,5 @@
-use crate::lang::{INVALID_ID, WordData, WordGroup};
-use rusqlite::{Connection, params};
+use crate::lang::{WordData, WordGroup};
+use rusqlite::{params, Connection};
 use std::collections::HashMap;
 
 pub fn add_word(word: &mut WordData, connection: &Connection) {
diff --git a/src/dictionary.rs b/src/dictionary.rs
index 73182dc..e60318c 100644
--- a/src/dictionary.rs
+++ b/src/dictionary.rs
@@ -2,7 +2,7 @@ use crate::data_provider::words::{delete_group, delete_word, update_group, updat
 use crate::dictionary::DictionaryMessage::*;
 use crate::dictionary_test::DictionaryQuizState;
 use crate::import::ImportState;
-use crate::lang::{INVALID_ID, WordData, WordGroup};
+use crate::lang::{WordData, WordGroup};
 use crate::navigation::Page::{Import, Word};
 use crate::navigation::{NavigatedPage, Page};
 use crate::styling::*;
diff --git a/src/lang.rs b/src/lang.rs
index 182650b..ee2f99d 100644
--- a/src/lang.rs
+++ b/src/lang.rs
@@ -26,7 +26,7 @@ const MAX_HISTORY_LEN_PART: f32 = 0.33;
 const MAX_SCORE: u8 = 25;
 const FADE_PER_DAY: f32 = 0.95;
 #[derive(Clone, PartialEq, Eq, Debug, Hash, Copy)]
-pub(crate) struct Id(u32);
+pub struct Id(u32);
 pub const INVALID_ID: Id = Id(0);
 impl FromStr for Id {
     type Err = ParseIntError;
@@ -650,9 +650,11 @@ impl DeckSettings {
             open_mode: OrderMode::Default,
         }
     }
-    pub(crate) fn check_filter(&self) -> bool {
+    pub fn check_filter(&self) -> bool {
+        let time = Instant::now();
         let engine = Engine::new();
         let ast = engine.compile(&self.filter);
+        println!("Compile time is {:?}", time.elapsed());
         ast.is_ok()
     }
     pub fn get_word_list(&self, state: &AppState) -> Vec<usize> {
diff --git a/src/main.rs b/src/main.rs
index 479f092..297eafd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,10 +32,10 @@ use iced::{Font, window};
 use iced::{Subscription, Theme, keyboard};
 use iced_core::Size;
 use iced_core::window::Position;
-use iced_core::window::settings::PlatformSpecific;
 use mimalloc::MiMalloc;
 use rusqlite::Connection;
-
+#[cfg(target_os = "linux")]
+use iced_core::window::settings::PlatformSpecific;
 #[global_allocator]
 static GLOBAL: MiMalloc = MiMalloc;
 
diff --git a/src/repetition_settings.rs b/src/repetition_settings.rs
index 65f6c6b..366a04f 100644
--- a/src/repetition_settings.rs
+++ b/src/repetition_settings.rs
@@ -9,15 +9,17 @@ use iced::widget::button::danger;
 use iced::widget::{button, column, row, scrollable, space, text, text_input};
 use iced::{Element, Task};
 use iced_core::Length::Fill;
-use iced_core::Padding;
+use iced_core::{color, Padding, Theme};
 use std::sync::{Arc, Mutex};
 use std::time::Duration;
+use iced::widget::text_input::Catalog;
 
 pub struct RepetitionSettingsState {
     set: DeckSettings,
     index: usize,
     state: Arc<Mutex<AppState>>,
     real_delete: bool,
+    correct_filter: bool,
 }
 
 impl RepetitionSettingsState {
@@ -27,11 +29,14 @@ impl RepetitionSettingsState {
             let local_state = p1.lock().unwrap();
             set = local_state.decks[index].clone();
         }
+        let filter_state = set.check_filter();
+
         RepetitionSettingsState {
             index,
             set,
             state: p1,
             real_delete: false,
+            correct_filter: filter_state,
         }
     }
 }
@@ -65,6 +70,7 @@ impl NavigatedPage<RepetitionSettingsMessage> for RepetitionSettingsState {
             }
             SetFilter(new) => {
                 self.set.filter = new;
+                self.correct_filter = self.set.check_filter();
             }
             TryFilter => {
                 let state = self.state.lock().unwrap();
@@ -111,7 +117,13 @@ impl NavigatedPage<RepetitionSettingsMessage> for RepetitionSettingsState {
                         .spacing(QUARTER_SPACING),
                         column![
                             text!("Фильтр"),
-                            text_input("", &self.set.filter).on_input(SetFilter),
+                            text_input("", &self.set.filter).style(|x, status| {
+                                let mut primary = Theme::default()(x, status);
+                                if !self.correct_filter {
+                                    primary.border.color = color!(255, 255, 0);
+                                }
+                                primary
+                            }).on_input(SetFilter),
                             button("Проверить фильтр")
                                 .style(jl_button)
                                 .on_press(TryFilter),