Problem report #126: base/src/emacs/src/font.c (font_at); UNINIT

[Dan Nicolaescu]

CID: 126
Checker: UNINIT (help)
File: base/src/emacs/src/font.c
Function: font_at
Description: Using uninitialized value "multibyte"

Event var_decl: Declared variable "multibyte" without initializer
Also see events: [uninit_use]

3594      int multibyte;
3595      Lisp_Object font_object;
3596    

At conditional (1): "c < 0" taking false path

3597      if (c < 0)
3598        {
3599          if (NILP (string))
3600            {
3601              multibyte = ! NILP 
(current_buffer->enable_multibyte_characters);
3602              if (multibyte)
3603                {
3604                  EMACS_INT pos_byte = CHAR_TO_BYTE (pos);
3605    
3606                  c = FETCH_CHAR (pos_byte);
3607                }
3608              else
3609                c = FETCH_BYTE (pos);
3610            }
3611          else
3612            {
3613              unsigned char *str;
3614    
3615              multibyte = STRING_MULTIBYTE (string);
3616              if (multibyte)
3617                {
3618                  EMACS_INT pos_byte = string_char_to_byte (string, pos);
3619    
3620                  str = SDATA (string) + pos_byte;
3621                  c = STRING_CHAR (str, 0);
3622                }
3623              else
3624                c = SDATA (string)[pos];
3625            }
3626        }
3627    
3628      f = XFRAME (w->frame);

At conditional (2): "(f)->output_method != 2" taking false path

3629      if (! FRAME_WINDOW_P (f))
3630        return Qnil;

At conditional (3): "face == 0" taking true path

3631      if (! face)
3632        {
3633          int face_id;
3634          EMACS_INT endptr;
3635    

At conditional (4): "string & 7 == 3" taking true path

3636          if (STRINGP (string))
3637            face_id = face_at_string_position (w, string, pos, 0, -1, -1, 
&endptr,
3638                                               DEFAULT_FACE_ID, 0);
3639          else
3640            face_id = face_at_buffer_position (w, pos, -1, -1, &endptr,
3641                                               pos + 100, 0);

At conditional (5): "face_id < ((f)->face_cache)->used" taking true path

3642          face = FACE_FROM_ID (f, face_id);
3643        }

Event uninit_use: Using uninitialized value "multibyte"
Also see events: [var_decl]

3644      if (multibyte)
3645        {
3646          int face_id = FACE_FOR_CHAR (f, face, c, pos, string);
3647          face = FACE_FROM_ID (f, face_id);
3648        }
3649      if (! face->font)
3650        return Qnil;
3651    
3652      XSETFONT (font_object, face->font);
3653      return font_object;
3654    }