[Bug-readline] [PATCH] fix cursor position when prompt has one invisible character

[Miroslav Lichvar]

When readline() is called with string "\001\017\002xyz" as prompt, the
cursor position will be wrong. The problem occurs when the first
character in the prompt is an invisible character and it's the only
invisible character in the string.

The following patch fixes the problem.

--- readline-5.2/display.c.inv
+++ readline-5.2/display.c
@@ -943,7 +943,7 @@ rl_redisplay ()
                  cpos_adjusted == 0 &&
                  _rl_last_c_pos != o_cpos &&
                  _rl_last_c_pos > wrap_offset &&
-                 o_cpos < prompt_last_invisible)
+                 o_cpos <= prompt_last_invisible)
                _rl_last_c_pos -= wrap_offset;
                  
              /* If this is the line with the prompt, we might need to


-- 
Miroslav Lichvar