Unbound variable error with set -u.

[tomchochola]

Operating system and version:

nvm debug output:

nvm --version: v0.40.0
$SHELL: /bin/bash
$SHLVL: 1
whoami: 'tom'
${HOME}: /home/tom
${NVM_DIR}: '${HOME}/.nvm'
$PREFIX: ''
${NPM_CONFIG_PREFIX}: ''
$NVM_NODEJS_ORG_MIRROR: ''
$NVM_IOJS_ORG_MIRROR: ''
shell version: 'GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)'
uname -a: 'Linux 5.15.153.1-microsoft-standard-WSL2 #1 SMP Fri Mar 29 23:14:13 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux'
checksum binary: 'sha256sum'
OS version: Ubuntu 22.04.4 LTS
awk: /usr/bin/awk, GNU Awk 5.1.0, API: 3.0 (GNU MPFR 4.1.0, GNU MP 6.2.1)
curl: /usr/bin/curl, curl 7.81.0 (x86_64-pc-linux-gnu) libcurl/7.81.0 OpenSSL/3.0.2 zlib/1.2.11 brotli/1.0.9 zstd/1.4.8 libidn2/2.3.2 libpsl/0.21.0 (+libidn2/2.3.2) libssh/0.9.6/openssl/zlib nghttp2/1.43.0 librtmp/2.3 OpenLDAP/2.5.18
wget: /usr/bin/wget, GNU Wget 1.21.2 built on linux-gnu.
git: /usr/bin/git, git version 2.34.1
grep: /usr/bin/grep (grep --color=auto), grep (GNU grep) 3.7
sed: /usr/bin/sed, sed (GNU sed) 4.8
cut: /usr/bin/cut, cut (GNU coreutils) 8.32
basename: /usr/bin/basename, basename (GNU coreutils) 8.32
rm: /usr/bin/rm, rm (GNU coreutils) 8.32
mkdir: /usr/bin/mkdir, mkdir (GNU coreutils) 8.32
xargs: /usr/bin/xargs, xargs (GNU findutils) 4.8.0
nvm current: system
which node: /usr/bin/node
which iojs:
which npm: /usr/bin/npm
npm config get prefix: /usr
npm root -g: /usr/lib/node_modules

nvm ls output:

->       system
iojs -> N/A (default)
node -> stable (-> N/A) (default)
unstable -> N/A (default)
lts/* -> lts/iron (-> N/A)
lts/argon -> v4.9.1 (-> N/A)
lts/boron -> v6.17.1 (-> N/A)
lts/carbon -> v8.17.0 (-> N/A)
lts/dubnium -> v10.24.1 (-> N/A)
lts/erbium -> v12.22.12 (-> N/A)
lts/fermium -> v14.21.3 (-> N/A)
lts/gallium -> v16.20.2 (-> N/A)
lts/hydrogen -> v18.20.4 (-> N/A)
lts/iron -> v20.16.0 (-> N/A)

How did you install nvm?

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash

What steps did you perform?

set -xeuo pipefail
if test -f .nvmrc; then curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash; source "${NVM_DIR}/nvm.sh" --no-use; nvm install; nvm use; fi

What happened?

+++ '[' -z v18 ']'
+++ local keys=
+++ local values=
+++ IFS=
+++ read -r line
+++ '[' -z v18 ']'
+++ '[' -z v18 ']'
+++ case "$line" in
+++ false
/root/.nvm/nvm.sh: line 552: unpaired_line: unbound variable
++ NVM_RC_VERSION=
++ return 1
++ '[' 1 -eq 1 ']'
++ '[' -z '' ']'
++ unset NVM_RC_VERSION
++ nvm --help
++ '[' 1 -lt 1 ']'
++ local DEFAULT_IFS
+++ nvm_echo t
+++ command printf '%s\n' t
+++ command tr t '\t'
++ DEFAULT_IFS=' 	

What did you expect to happen?

With configuration set -u the install script is not working properly. It throws error on unbound variable.

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

no