Some prompts remove last line from command output

[ickerwx]

Description

I just noticed this again, but it has happened in the past as well: I am inside a directory and run cat on a file:

(using a fancy prompt like agnoster)$ cat file
line 1
(fancy prompt again)

Now, if I run cat again using a less fancy prompt, I get this:

(less fancy prompt like minimal)$ cat file
line 1
line 2
(less fancy prompt again)

Expected behavior

I expect to see all lines of the file.

Actual behavior

The last line is missing from the output

It looks like some of the prompts have trouble working with output that does not end with a newline character.

Steps to Reproduce

1. Create a file containing multiple lines of text, make sure that the last line does not have a newline character at the end
2. Switch to a prompt like agnoster, powerline or fade (I did not test all prompts!)
3. run cat on the file and see that the last line is not printed

Versions

• Prezto commit: b3c27bb
• ZSH version: zsh 5.4.2
• OS information: Arch Linux 4.15.5-1-ARCH

[belak]

I'm guessing these prompts don't specify prompt_sp.

Here's an example fixing agnoster: agnoster/agnoster-zsh-theme#46

I'll take a closer look when I'm at an actual computer and not on my phone but I'd be willing to bet this is it ;)

[ickerwx]

I can confirm that the problem is gone when I apply the fix you mentioned.

[belak]

I'm going to close this for now as it's a duplicate of #1425 and there's a workaround. Thanks for reporting!