zsh messing up new-line and/or input echoing

Question

(EDIT) : The description below are two unrelated behaviors: one is behaving as expected, the other is an actual issue inrelated to zsh . There is no new-line regression in zsh .

---

I've migrated to zsh from bash in OSX (Catalina). I also use oh-my-zsh . I've noticed recently the new line character or the echo of the input is sometimes missing. I've found at least two cases:

1. using time : (first invocation uses /bin/zsh )

~
▶ time ls
 1pwd.bkp       Downloads   Pictures   'VirtualBox VMs'   go                pf-docs.txt       tools
 Applications   Library     Public      bin               istio-lean.yaml   plugins.sbt.bkp   wip
 Desktop        Movies      SWIFT       docs.txt          main.txt          project           workshop
 Documents      Music       Snapshots   git               normal.yml        todo
gls --color=tty  0.00s user 0.00s system 62% cpu 0.009 total

~
▶ /bin/sh
# time ls
1pwd.bkp        Downloads       Pictures        VirtualBox VMs  go              pf-docs.txt     tools
Applications    Library         Public          bin             istio-lean.yaml plugins.sbt.bkp wip
Desktop         Movies          SWIFT           docs.txt        main.txt        project         workshop
Documents       Music           Snapshots       git             normal.yml      todo

real    0m0.011s
user    0m0.003s
sys     0m0.005s
#

2. using sbt / g8 : (first invocation uses /bin/zsh )

~/wip/deleteme
▶ sbt new scala/scala-seed.g8
[info] Loading settings for project global-plugins from build.sbt ...
[info] Loading global plugins from /Users/ignasi/.sbt/1.0/plugins
[info] Set current project to deleteme (in build file:/Users/ignasi/wip/deleteme/)
[info] Set current project to deleteme (in build file:/Users/ignasi/wip/deleteme/)

A minimal Scala project.

name [Scala Seed Project]:
Template applied in /Users/ignasi/wip/deleteme/./myprojectzsh


~/wip/deleteme
▶ /bin/sh
sh: _direnv_hook: command not found
%n@%m %1~ %# sbt new scala/scala-seed.g8
[info] Loading settings for project global-plugins from build.sbt ...
[info] Loading global plugins from /Users/ignasi/.sbt/1.0/plugins
[info] Set current project to deleteme (in build file:/Users/ignasi/wip/deleteme/)
[info] Set current project to deleteme (in build file:/Users/ignasi/wip/deleteme/)

A minimal Scala project.

name [Scala Seed Project]: MyProjectBinSh

Template applied in /Users/ignasi/wip/deleteme/./myprojectbinsh

# ls

Note how the invocation under /bin/zsh doesn't echo the user input ( myprojectzsh ) after name [...]: :

name [Scala Seed Project]:
Template applied in /Users/ignasi/wip/deleteme/./myprojectzsh

and even is missing a blank newline.

I haven't ruled out the issue is actually two different problems in time and sbt / g8 which happen to have the same symptoms.

PS:Things get even a bit weird when I try time echo hello in /bin/zsh :

▶ time echo hello
hello

~
▶

Where the time report is not even printed (?).

Answer 1

There is nothing messed up in 1. time is built-in shell command in zsh (and also in bash). You can check for yourself

which time

Behaviour and output style of zsh time is different than the one in the bash. You can run "real" binary implementation of time : /usr/bin/time command and see it will produce yet another differently formatted output.

Also the reason why time echo hello has no output is that in zsh time has no effect on built-in commands like echo. If you really want to, you can force execution of subshell by using parenthesis like this time (echo hello) , but ultimately this doesn't make any sense -- you are measuring time of subshell life, not the echo itself.