diff --git a/.gitignore b/.gitignore
index 0d4f282ca9..9269e47614 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 **/*.o
+**/*bin
 **/*.swp
 **/*.swo
 tags
diff --git a/src/lv_core/lv_obj.c b/src/lv_core/lv_obj.c
index 9e1a36879a..65a223796f 100644
--- a/src/lv_core/lv_obj.c
+++ b/src/lv_core/lv_obj.c
@@ -22,6 +22,7 @@
 #include "../lv_misc/lv_math.h"
 #include "../lv_misc/lv_gc.h"
 #include "../lv_misc/lv_math.h"
+#include "../lv_misc/lv_log.h"
 #include "../lv_hal/lv_hal.h"
 #include <stdint.h>
 #include <string.h>
@@ -127,10 +128,12 @@ void lv_init(void)
 void lv_deinit(void)
 {
     lv_gc_clear_roots();
-    lv_log_register_print_cb(NULL);
     lv_disp_set_default(NULL);
     lv_mem_deinit();
     lv_initialized = false;
+#if LV_USE_LOG
+    lv_log_register_print_cb(NULL);
+#endif
     LV_LOG_INFO("lv_deinit done");
 }
 #endif
diff --git a/src/lv_core/lv_obj.h b/src/lv_core/lv_obj.h
index ff3d0d6c4d..cd99382e6b 100644
--- a/src/lv_core/lv_obj.h
+++ b/src/lv_core/lv_obj.h
@@ -23,7 +23,6 @@ extern "C" {
 #include "../lv_misc/lv_mem.h"
 #include "../lv_misc/lv_ll.h"
 #include "../lv_misc/lv_color.h"
-#include "../lv_misc/lv_log.h"
 #include "../lv_misc/lv_bidi.h"
 #include "../lv_hal/lv_hal.h"
 
diff --git a/src/lv_draw/lv_draw_blend.c b/src/lv_draw/lv_draw_blend.c
index 7df70c4772..b46ce272ce 100644
--- a/src/lv_draw/lv_draw_blend.c
+++ b/src/lv_draw/lv_draw_blend.c
@@ -707,6 +707,10 @@ static inline lv_color_t color_blend_true_color_additive(lv_color_t fg, lv_color
     if(opa <= LV_OPA_MIN) return bg;
 
     uint16_t tmp;
+#if LV_COLOR_DEPTH == 1
+    tmp = bg.full + fg.full;
+    fg.full = LV_MATH_MIN(tmp, 1);
+#else
     tmp = bg.ch.red + fg.ch.red;
 #if LV_COLOR_DEPTH == 8
     fg.ch.red = LV_MATH_MIN(tmp, 7);
@@ -740,6 +744,7 @@ static inline lv_color_t color_blend_true_color_additive(lv_color_t fg, lv_color
     fg.ch.blue = LV_MATH_MIN(tmp, 31);
 #elif LV_COLOR_DEPTH == 32
     fg.ch.blue = LV_MATH_MIN(tmp, 255);
+#endif
 #endif
 
     if(opa == LV_OPA_COVER) return fg;
diff --git a/src/lv_objx/lv_bar.c b/src/lv_objx/lv_bar.c
index f8f9921356..7afdc9ec8f 100644
--- a/src/lv_objx/lv_bar.c
+++ b/src/lv_objx/lv_bar.c
@@ -34,13 +34,15 @@
  **********************/
 static lv_design_res_t lv_bar_design(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode);
 static lv_res_t lv_bar_signal(lv_obj_t * bar, lv_signal_t sign, void * param);
-static void lv_bar_set_value_with_anim(lv_obj_t * bar, int16_t new_value, int16_t *value_ptr, lv_bar_anim_t *anim_info, lv_anim_enable_t en);
-static void lv_bar_init_anim(lv_obj_t * bar, lv_bar_anim_t * bar_anim);
+
 
 static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);
 static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);
 
+
 #if LV_USE_ANIMATION
+static void lv_bar_set_value_with_anim(lv_obj_t * bar, int16_t new_value, int16_t *value_ptr, lv_bar_anim_t *anim_info, lv_anim_enable_t en);
+static void lv_bar_init_anim(lv_obj_t * bar, lv_bar_anim_t * bar_anim);
 static void lv_bar_anim(lv_bar_anim_t * bar, lv_anim_value_t value);
 static void lv_bar_anim_ready(lv_anim_t * a);
 #endif
@@ -146,9 +148,6 @@ void lv_bar_set_value(lv_obj_t * bar, int16_t value, lv_anim_enable_t anim)
 {
     LV_ASSERT_OBJ(bar, LV_OBJX_NAME);
 
-#if LV_USE_ANIMATION == 0
-    anim = false;
-#endif
     lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
     if(ext->cur_value == value) return;
 
@@ -157,9 +156,12 @@ void lv_bar_set_value(lv_obj_t * bar, int16_t value, lv_anim_enable_t anim)
     new_value = new_value < ext->min_value ? ext->min_value : new_value;
 
     if(ext->cur_value == new_value) return;
-
+#if LV_USE_ANIMATION == 0
+    ext->cur_value = new_value;
+    lv_obj_invalidate(bar);
+#else
 	lv_bar_set_value_with_anim(bar, new_value, &ext->cur_value, &ext->cur_value_anim, anim);
-
+#endif
 }
 
 /**
@@ -172,9 +174,6 @@ void lv_bar_set_start_value(lv_obj_t * bar, int16_t start_value, lv_anim_enable_
 {
     LV_ASSERT_OBJ(bar, LV_OBJX_NAME);
 
-#if LV_USE_ANIMATION == 0
-    anim = false;
-#endif
     lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
     if(ext->start_value == start_value) return;
 
@@ -183,8 +182,11 @@ void lv_bar_set_start_value(lv_obj_t * bar, int16_t start_value, lv_anim_enable_
     new_value = new_value < ext->min_value ? ext->min_value : start_value;
 
     if(ext->start_value == new_value) return;
-
-	lv_bar_set_value_with_anim(bar, start_value, &ext->start_value, &ext->start_value_anim, anim);
+#if LV_USE_ANIMATION == 0
+    ext->start_value = new_value;
+#else
+	lv_bar_set_value_with_anim(bar, new_value, &ext->start_value, &ext->start_value_anim, anim);
+#endif
 }
 
 /**
@@ -647,9 +649,11 @@ static lv_res_t lv_bar_signal(lv_obj_t * bar, lv_signal_t sign, void * param)
     }
 
 	if(sign == LV_SIGNAL_CLEANUP) {
+#if LV_USE_ANIMATION
 		lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
 		lv_anim_del(&ext->cur_value_anim, NULL);
 		lv_anim_del(&ext->start_value_anim, NULL);
+#endif
 	}
 
     return res;
@@ -673,14 +677,12 @@ static void lv_bar_anim_ready(lv_anim_t * a)
 		ext->start_value = var->anim_end;
 	lv_obj_invalidate(var->bar);
 }
-#endif
 
 static void lv_bar_set_value_with_anim(lv_obj_t * bar, int16_t new_value, int16_t *value_ptr, lv_bar_anim_t *anim_info, lv_anim_enable_t en) {
     if(en == LV_ANIM_OFF) {
         *value_ptr = new_value;
         lv_obj_invalidate(bar);
     } else {
-#if LV_USE_ANIMATION
         lv_bar_ext_t *ext = lv_obj_get_ext_attr(bar);
         /*No animation in progress -> simply set the values*/
         if(!anim_info->is_animating) {
@@ -711,7 +713,6 @@ static void lv_bar_set_value_with_anim(lv_obj_t * bar, int16_t new_value, int16_
 
         lv_anim_create(&a);
 		anim_info->is_animating = true;
-#endif
     }
 }
 
@@ -722,5 +723,6 @@ static void lv_bar_init_anim(lv_obj_t * bar, lv_bar_anim_t * bar_anim)
 	bar_anim->anim_end = 0;
 	bar_anim->is_animating = false;
 }
+#endif
 
 #endif
diff --git a/src/lv_objx/lv_objmask.c b/src/lv_objx/lv_objmask.c
index 1d426e92d0..3ad6898737 100644
--- a/src/lv_objx/lv_objmask.c
+++ b/src/lv_objx/lv_objmask.c
@@ -106,7 +106,7 @@ lv_obj_t * lv_objmask_create(lv_obj_t * par, const lv_obj_t * copy)
 lv_objmask_mask_t * lv_objmask_add_mask(lv_obj_t * objmask, void * param)
 {
     LV_ASSERT_OBJ(objmask, LV_OBJX_NAME);
-    LV_ASSERT_NULL(param)
+    LV_ASSERT_NULL(param);
 
     lv_objmask_ext_t * ext = lv_obj_get_ext_attr(objmask);
 
diff --git a/src/lv_objx/lv_spinbox.c b/src/lv_objx/lv_spinbox.c
index 66b50b2f34..25a319bd3f 100644
--- a/src/lv_objx/lv_spinbox.c
+++ b/src/lv_objx/lv_spinbox.c
@@ -344,7 +344,6 @@ static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * p
     if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
 
 
-    lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
     if(sign == LV_SIGNAL_CLEANUP) {
         /*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
     } else if(sign == LV_SIGNAL_GET_TYPE) {
@@ -357,6 +356,7 @@ static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * p
     } else if(sign == LV_SIGNAL_RELEASED) {
         /*If released with an ENCODER then move to the next digit*/
 #if LV_USE_GROUP
+        lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
         lv_indev_t * indev = lv_indev_get_act();
         if(lv_indev_get_type(indev) == LV_INDEV_TYPE_ENCODER) {
             if(lv_group_get_editing(lv_obj_get_group(spinbox))) {
diff --git a/tests/build.py b/tests/build.py
index 46e8d5756a..a633a19534 100644
--- a/tests/build.py
+++ b/tests/build.py
@@ -1,6 +1,6 @@
 import os
 
-warnings = '"-Wall"' 
+warnings = '"-Wall -Werror"' 
 base_defines = '"-DLV_CONF_PATH=tests/lv_test_conf.h -DLV_BUILD_TEST"'
 optimization = '"-O3 -g0"'