clang/"dead assignments" #10620

Also revert possibly-wrong change in f_sign_getplaced() from
652be3cb00.

src/nvim/edit.c

@@ -3110,6 +3110,7 @@ void get_complete_info(list_T *what_list, dict_T *retdict)
                          ? compl_curr_match->cp_number - 1 : -1);
   }
 
+  (void)ret;
   // TODO(vim):
   // if (ret == OK && (what_flag & CI_WHAT_INSERTED))
 }

src/nvim/eval.c

@@ -16032,10 +16032,12 @@ static void f_sign_getplaced(typval_T *argvars, typval_T *rettv, FunPtr fptr)
       }
       if ((di = tv_dict_find(dict, "lnum", -1)) != NULL) {
         // get signs placed at this line
-        lnum = tv_get_lnum(&di->di_tv);
-        if (lnum <= 0) {
+        lnum = (linenr_T)tv_get_number_chk(&di->di_tv, &notanum);
+        if (notanum) {
           return;
         }
+        (void)lnum;
+        lnum = tv_get_lnum(&di->di_tv);
       }
       if ((di = tv_dict_find(dict, "id", -1)) != NULL) {
         // get sign placed with this identifier
@@ -16164,6 +16166,7 @@ static void f_sign_place(typval_T *argvars, typval_T *rettv, FunPtr fptr)
       if (notanum) {
         goto cleanup;
       }
+      (void)lnum;
       lnum = tv_get_lnum(&di->di_tv);
     }
     if ((di = tv_dict_find(dict, "priority", -1)) != NULL) {

src/nvim/option.c

@@ -3508,7 +3508,9 @@ static char_u *set_chars_option(win_T *wp, char_u **varp)
 {
   int round, i, len, entries;
   char_u *p, *s;
-  int c1 = 0, c2 = 0, c3 = 0;
+  int c1;
+  int c2 = 0;
+  int c3 = 0;
 
   struct chars_tab {
     int     *cp;    ///< char value
@@ -3575,7 +3577,7 @@ static char_u *set_chars_option(win_T *wp, char_u **varp)
         if (STRNCMP(p, tab[i].name, len) == 0
             && p[len] == ':'
             && p[len + 1] != NUL) {
-          c1 = c2 = c3 = 0;
+          c2 = c3 = 0;
           s = p + len + 1;
 
           // TODO(bfredl): use schar_T representation and utfc_ptr2len

src/nvim/quickfix.c

@@ -2056,7 +2056,7 @@ static int qf_jump_to_usable_window(int qf_fnum, int *opened_window)
   win_T       *usable_win_ptr = NULL;
   int         usable_win;
   int         flags;
-  win_T       *win = NULL;
+  win_T       *win;
   win_T       *altwin;
 
   usable_win = 0;
@@ -2079,7 +2079,6 @@ static int qf_jump_to_usable_window(int qf_fnum, int *opened_window)
     // Locate a window showing a normal buffer
     FOR_ALL_WINDOWS_IN_TAB(win2, curtab) {
       if (win2->w_buffer->b_p_bt[0] == NUL) {
-        win = win2;
         usable_win = 1;
         break;
       }

src/nvim/screen.c

@@ -3143,7 +3143,6 @@ win_line (
           c = '>';
           mb_c = c;
           mb_l = 1;
-          mb_utf8 = false;
           multi_attr = win_hl_attr(wp, HLF_AT);
 
           // put the pointer back to output the double-width

src/nvim/viml/parser/expressions.c

@@ -2330,7 +2330,7 @@ viml_pexpr_parse_invalid_comma:
             break;
           } else if (eastnode_type == kExprNodeSubscript) {
             is_subscript = true;
-            can_be_ternary = false;
+            // can_be_ternary = false;
             assert(!is_ternary);
             break;
           } else if (eastnode_type == kExprNodeColon) {