Bsrgvty

I've noticed weird behaviors by varying either the current path's length or the gnome-terminal's width. I'll give you an example (I use the character | to indicate the window's right border):

username@hostname:/directory/directory/directory/dire |
ory/directory/directory/directory/directory/directory |
/directory/directory/directory/directory/directory/di |
rectory/directory/directory$ |

As you can see, at the first row, Ubuntu terminal hides the string "ct" of the word "directory"; the other rows are fine.
I said the string "ct" is hidden because, if I resize the window width, that reappears but other two characters are hidden. For example:

username@hostname:/directory/directory/directory/di |
ctory/directory/directory/directory/directory/direc |
tory/directory/directory/directory/directory/direct |
ory/directory/directory$ |

This time the string "re" is hidden. The problem always occurs at the first row!

I use gnome-terminal. You get it with Ubuntu 18.04.2 installation and find it among pre-installed applications.

$ grep PS1 ~/.bashrc
PS1='$debian_chroot:+($debian_chroot)[33[01;32m]u@h[33[00m]:[33[01;34m]w[33[00m]$ '
PS1='$debian_chroot:+($debian_chroot)u@h:w$ '
PS1="[e]0;$debian_chroot:+($debian_chroot)u@h: wa]$PS1"

$ printf '%qn' "$PS1"
\[\e]0;\u@\h: \w\a\]$debian_chroot:+($debian_chroot)\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ 

$ printf '%qn' "$PROMPT_COMMAND"
''

I've done some experiments and noticed different "weird" behaviors by varying either the current path's length or the window width:

1. If the length is short, I can resize the window width and all the rows are always fine (no hidden characters);


2. if I increase the length of a little bit (for example adding a directory), the first row's last character is hidden;


3. If I use cd .. command to decrease the path till the point 1 length and resize the window enough to make the path takes more than a row, five characters are hidden (same length but different behavior);


4. 
   

   By varying the window width, part of the row is overwritten; for example:

   
   
   

   $ ername@hostname:/directory/directory/directory/directory/directory |

   
   

The substring "us" is deleted and gnome-terminal lets me write commands over that line which will be deleted as I type.

I'm using Ubuntu-18.04.2's original ~/.bashrc file. I've read many questions related with my issue, but I haven't managed to solve it. My issue seems different from those ones.

In your PS1 you must enclose the non-printable characters (and only those!) inside [ and ]. You also enclose the printable ones (like @, but also placeholders like h. This messes up bash's calculation of where the cursor is.

It is bash and not gnome-terminal that chops off (doesn't properly display) the last two letters