nvm: nvm install crashes bash script when bash is set to exit on error

• Operating system and version: OSX 10.11.6

• How did you install nvm? (e.g. install script in readme, Homebrew): curl

• What steps did you perform?

I ran this script:

Marks-MacBook-Pro:tmp marksmith$ cat /tmp/nvm_exit_on_error_issue.sh
#!/usr/bin/env bash

set -e; set -o pipefail

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
nvm install stable
echo "done"
exit 0

• What happened?

Marks-MacBook-Pro:tmp marksmith$ /tmp/nvm_exit_on_error_issue.sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13226  100 13226    0     0   3637      0  0:00:03  0:00:03 --:--:--  3637
=> Downloading nvm from git to '/Users/marksmith/.nvm'
=> Cloning into '/Users/marksmith/.nvm'...
remote: Enumerating objects: 278, done.
remote: Counting objects: 100% (278/278), done.
remote: Compressing objects: 100% (249/249), done.
remote: Total 278 (delta 33), reused 88 (delta 16), pack-reused 0
Receiving objects: 100% (278/278), 142.36 KiB | 65.00 KiB/s, done.
Resolving deltas: 100% (33/33), done.
=> Compressing and cleaning up git repository

=> nvm source string already in /Users/marksmith/.bash_profile
=> bash_completion source string already in /Users/marksmith/.bash_profile
=> Close and reopen your terminal to start using nvm or run the following to use it now:

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

The script doesn’t complete.

Now comment out the exit on error line and run again:

Marks-MacBook-Pro:tmp marksmith$ vim /tmp/nvm_exit_on_error_issue.sh
Marks-MacBook-Pro:tmp marksmith$ cat /tmp/nvm_exit_on_error_issue.sh | grep pipe
#set -e; set -o pipefail
Marks-MacBook-Pro:tmp marksmith$ unset NVM_DIR; rm -rf ~/.nvm
Marks-MacBook-Pro:tmp marksmith$ /tmp/nvm_exit_on_error_issue.sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13226  100 13226    0     0   5546      0  0:00:02  0:00:02 --:--:--  5545
=> Downloading nvm from git to '/Users/marksmith/.nvm'
=> Cloning into '/Users/marksmith/.nvm'...
remote: Enumerating objects: 278, done.
remote: Counting objects: 100% (278/278), done.
remote: Compressing objects: 100% (249/249), done.
remote: Total 278 (delta 33), reused 88 (delta 16), pack-reused 0
Receiving objects: 100% (278/278), 142.36 KiB | 68.00 KiB/s, done.
Resolving deltas: 100% (33/33), done.
=> Compressing and cleaning up git repository

=> nvm source string already in /Users/marksmith/.bash_profile
=> bash_completion source string already in /Users/marksmith/.bash_profile
=> Close and reopen your terminal to start using nvm or run the following to use it now:

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
Downloading and installing node v12.7.0...
Downloading https://nodejs.org/dist/v12.7.0/node-v12.7.0-darwin-x64.tar.gz...
######################################################################## 100.0%
Computing checksum with shasum -a 256
Checksums matched!
Creating default alias: default -> stable (-> v12.7.0)
done

The script completes.

• What did you expect to happen?

The script to complete in both cases.

• Is there anything in any of your profile files (.bashrc, .bash_profile, .zshrc, etc) that modifies the PATH?

Only .bash_profile has the nvm loading code from the installation guide.