diff --git a/src/lv_draw/lv_draw_blend.c b/src/lv_draw/lv_draw_blend.c
index 1a0c0099b..7df70c477 100644
--- a/src/lv_draw/lv_draw_blend.c
+++ b/src/lv_draw/lv_draw_blend.c
@@ -51,7 +51,7 @@ static void map_blended(const lv_area_t * disp_area, lv_color_t * disp_buf,  con
         const lv_area_t * map_area, const lv_color_t * map_buf, lv_opa_t opa,
         const lv_opa_t * mask, lv_draw_mask_res_t mask_res, lv_blend_mode_t mode);
 
-static inline lv_color_t color_blend_true_color_additive(lv_color_t bg, lv_color_t fg, lv_opa_t opa);
+static inline lv_color_t color_blend_true_color_additive(lv_color_t fg, lv_color_t bg, lv_opa_t opa);
 static inline lv_color_t color_blend_true_color_subtractive(lv_color_t fg, lv_color_t bg, lv_opa_t opa);
 
 /**********************
diff --git a/src/lv_misc/lv_task.c b/src/lv_misc/lv_task.c
index ffe996a81..8a7bffca8 100644
--- a/src/lv_misc/lv_task.c
+++ b/src/lv_misc/lv_task.c
@@ -65,6 +65,8 @@ void lv_task_core_init(void)
  */
 LV_ATTRIBUTE_TASK_HANDLER void lv_task_handler(void)
 {
+
+
     LV_LOG_TRACE("lv_task_handler started");
 
     /*Avoid concurrent running of the task handler*/
diff --git a/src/lv_objx/lv_cpicker.c b/src/lv_objx/lv_cpicker.c
index cbd718322..21b055439 100644
--- a/src/lv_objx/lv_cpicker.c
+++ b/src/lv_objx/lv_cpicker.c
@@ -384,18 +384,20 @@ const lv_style_t * lv_cpicker_get_style(const lv_obj_t * cpicker, lv_cpicker_sty
     LV_ASSERT_OBJ(cpicker, LV_OBJX_NAME);
 
     lv_cpicker_ext_t * ext = lv_obj_get_ext_attr(cpicker);
+    const lv_style_t * style;
 
     switch(type) {
     case LV_CPICKER_STYLE_MAIN:
-        return lv_obj_get_style(cpicker);
+        style = lv_obj_get_style(cpicker);
+        break;
     case LV_CPICKER_STYLE_INDICATOR:
-        return ext->indic.style;
+        style = ext->indic.style;
+        break;
     default:
-        return NULL;
+        style = NULL;
     }
 
-    /*To avoid warning*/
-    return NULL;
+    return style;
 }
 
 /**
diff --git a/src/lv_objx/lv_ddlist.c b/src/lv_objx/lv_ddlist.c
index 87c92a369..02f56b552 100644
--- a/src/lv_objx/lv_ddlist.c
+++ b/src/lv_objx/lv_ddlist.c
@@ -456,16 +456,23 @@ const lv_style_t * lv_ddlist_get_style(const lv_obj_t * ddlist, lv_ddlist_style_
     LV_ASSERT_OBJ(ddlist, LV_OBJX_NAME);
 
     lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
+    const lv_style_t * style;
 
     switch(type) {
-        case LV_DDLIST_STYLE_BG: return lv_page_get_style(ddlist, LV_PAGE_STYLE_BG);
-        case LV_DDLIST_STYLE_SB: return lv_page_get_style(ddlist, LV_PAGE_STYLE_SB);
-        case LV_DDLIST_STYLE_SEL: return ext->sel_style;
-        default: return NULL;
+        case LV_DDLIST_STYLE_BG:
+            style = lv_page_get_style(ddlist, LV_PAGE_STYLE_BG);
+            break;
+        case LV_DDLIST_STYLE_SB:
+            style = lv_page_get_style(ddlist, LV_PAGE_STYLE_SB);
+            break;
+        case LV_DDLIST_STYLE_SEL:
+            style = ext->sel_style;
+            break;
+        default:
+            style = NULL;
     }
 
-    /*To avoid warning*/
-    return NULL;
+    return style;
 }
 
 lv_label_align_t lv_ddlist_get_align(const lv_obj_t * ddlist)
diff --git a/src/lv_objx/lv_line.c b/src/lv_objx/lv_line.c
index 0a71b18f2..4a963c546 100644
--- a/src/lv_objx/lv_line.c
+++ b/src/lv_objx/lv_line.c
@@ -246,7 +246,7 @@ static lv_design_res_t lv_line_design(lv_obj_t * line, const lv_area_t * clip_ar
         }
         lv_area_t circle_area;
         lv_coord_t r = (style->line.width >> 1);
-        lv_coord_t r_corr = style->line.width & 1 ? 0 : 1;
+        lv_coord_t r_corr = (style->line.width & 1) ? 0 : 1;
 
         /*Read all points and draw the lines*/
         for(i = 0; i < ext->point_num - 1; i++) {
diff --git a/src/lv_objx/lv_roller.c b/src/lv_objx/lv_roller.c
index 01b0e6ba4..cc15880b8 100644
--- a/src/lv_objx/lv_roller.c
+++ b/src/lv_objx/lv_roller.c
@@ -310,14 +310,19 @@ const lv_style_t * lv_roller_get_style(const lv_obj_t * roller, lv_roller_style_
 {
     LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
 
+    const lv_style_t * style;
     switch(type) {
-        case LV_ROLLER_STYLE_BG: return lv_obj_get_style(roller);
-        case LV_ROLLER_STYLE_SEL: return lv_ddlist_get_style(roller, LV_DDLIST_STYLE_SEL);
-        default: return NULL;
+        case LV_ROLLER_STYLE_BG:
+            style = lv_obj_get_style(roller);
+            break;
+        case LV_ROLLER_STYLE_SEL:
+            style = lv_ddlist_get_style(roller, LV_DDLIST_STYLE_SEL);
+            break;
+        default:
+            style = NULL;
     }
 
-    /*To avoid warning*/
-    return NULL;
+    return style;
 }
 
 /**********************
diff --git a/src/lv_themes/lv_theme_material.c b/src/lv_themes/lv_theme_material.c
index deceac946..a5694bfde 100644
--- a/src/lv_themes/lv_theme_material.c
+++ b/src/lv_themes/lv_theme_material.c
@@ -681,7 +681,6 @@ static void tabview_init(void)
     indic.body.radius        = 0;
     indic.body.border.width  = 0;
     indic.body.padding.inner = LV_DPI / 20;
-    indic.body.padding.inner = LV_DPI / 20;
 
     lv_style_copy(&btn_bg, &def);
     btn_bg.body.main_color     = lv_color_hex3(0xccc);