`nvm alias node 'lts/*'` works, but then it can't be reset via `nvm unalias node`.

[ksze]

Operating system and version:

OS: Pop!_OS 19.10 (which is very similar to Ubuntu 19.10)
nvm version: 0.35.1

nvm debug output:

nvm --version: v0.35.1
$SHELL: /usr/bin/zsh
$SHLVL: 1
${HOME}: /home/kal
${NVM_DIR}: '${HOME}/.nvm'
${PATH}: ${NVM_DIR}/versions/node/v12.13.0/bin:${HOME}/.pyenv/shims:${HOME}/.local/bin:${HOME}/.cargo/bin:${HOME}/.pyenv/plugins/pyenv-virtualenv/shims:${HOME}/.pyenv/shims:${HOME}/.pyenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
$PREFIX: ''
${NPM_CONFIG_PREFIX}: ''
$NVM_NODEJS_ORG_MIRROR: ''
$NVM_IOJS_ORG_MIRROR: ''
shell version: 'zsh 5.7.1 (x86_64-ubuntu-linux-gnu)'
uname -a: 'Linux 5.3.0-20-generic #21+system76~1572304854~19.10~8caa3e6-Ubuntu SMP Tue Oct 29 00:4 x86_64 x86_64 x86_64 GNU/Linux'
OS version: Ubuntu 19.10  
curl: /usr/bin/curl, curl 7.65.3 (x86_64-pc-linux-gnu) libcurl/7.65.3 OpenSSL/1.1.1c zlib/1.2.11 libidn2/2.2.0 libpsl/0.20.2 (+libidn2/2.0.5) libssh/0.9.0/openssl/zlib nghttp2/1.39.2 librtmp/2.3
wget: /usr/bin/wget, GNU Wget 1.20.3 built on linux-gnu.
git: /usr/bin/git, git version 2.24.0
ls: cannot access 'grep:': No such file or directory
grep: grep: aliased to grep  --color=auto --exclude-dir={.bzr,CVS,.git,.hg,.svn} (grep --color=auto --exclude-dir={.bzr,CVS,.git,.hg,.svn}), grep (GNU grep) 3.3
awk: /usr/bin/awk, awk: not an option: --version
sed: /usr/bin/sed, sed (GNU sed) 4.7
cut: /usr/bin/cut, cut (GNU coreutils) 8.30
basename: /usr/bin/basename, basename (GNU coreutils) 8.30
rm: /usr/bin/rm, rm (GNU coreutils) 8.30
mkdir: /usr/bin/mkdir, mkdir (GNU coreutils) 8.30
xargs: /usr/bin/xargs, xargs (GNU findutils) 4.6.0.225-235f
nvm current: v12.13.0
which node: ${NVM_DIR}/versions/node/v12.13.0/bin/node
which iojs: iojs not found
which npm: ${NVM_DIR}/versions/node/v12.13.0/bin/npm
npm config get prefix: ${NVM_DIR}/versions/node/v12.13.0
npm root -g: ${NVM_DIR}/versions/node/v12.13.0/lib/node_modules

nvm ls output:

->     v12.13.0
        v13.1.0
node -> lts/* (-> v12.13.0)
stable -> 13.1 (-> v13.1.0) (default)
iojs -> N/A (default)
unstable -> N/A (default)
lts/* -> lts/erbium (-> v12.13.0)
lts/argon -> v4.9.1 (-> N/A)
lts/boron -> v6.17.1 (-> N/A)
lts/carbon -> v8.16.2 (-> N/A)
lts/dubnium -> v10.17.0 (-> N/A)
lts/erbium -> v12.13.0

How did you install nvm?

Automatically installed by the zsh-nvm plugin.

What steps did you perform?

1. Change the built-in node alias by doing nvm alias node 'lts/*'
2. Try resetting the built-in node alias by doing nvm unalias node

What happened?

nvm tells me "node is a default (built-in) alias and cannot be deleted". I had to manually delete $NVM_DIR/alias/node

What did you expect to happen?

nvm resets the built-in node alias for me.

Is there anything in any of your profile files that modifies the PATH?

In .zprofile:

export PATH="$HOME/.pyenv/bin:$PATH"
export PATH="$HOME/.cargo/bin:$PATH"
export PATH="$HOME/.local/bin:$PATH"

[ljharb]

Thanks, definitely a bug.