[Pkg-javascript-devel] Bug#995702: TypeError: Cannot read property 'prefix_exceptions' of undefined

[Dominik George]

Package: node-autoprefixer
Version: 10.3.1.0+dfsg1+~cs14.6.19-1
Severity: grave
Justification: renders package unusable

autoprefixer currently does not work because it handles the agents
imported from caniuse-lite wrongly:


  /usr/share/nodejs/autoprefixer/lib/browsers.js:64
      let prefix = data.prefix_exceptions && data.prefix_exceptions[version]
                      ^

  TypeError: Cannot read property 'prefix_exceptions' of undefined
      at Browsers.prefix (/usr/share/nodejs/autoprefixer/lib/browsers.js:64:23)
      at /usr/share/nodejs/autoprefixer/lib/prefixes.js:193:54
      at Array.map (<anonymous>)
      at Prefixes.select (/usr/share/nodejs/autoprefixer/lib/prefixes.js:193:31)
      at new Prefixes (/usr/share/nodejs/autoprefixer/lib/prefixes.js:133:53)
      at loadPrefixes (/usr/share/nodejs/autoprefixer/lib/autoprefixer.js:111:22)
      at Object.prepare (/usr/share/nodejs/autoprefixer/lib/autoprefixer.js:121:22)
      at /usr/share/nodejs/postcss/lib/lazy-result.js:133:39
      at Array.map (<anonymous>)
      at new LazyResult (/usr/share/nodejs/postcss/lib/lazy-result.js:131:43)


The problem comes from /usr/share/nodejs/autoprefixer/lib/autoprefixer.js:

  let { agents } = require('caniuse-lite')

The object loaded here contains another object called agents. For me, changing line 10
fixes the issue:

  - let autoprefixerData = { browsers: agents, prefixes: dataPrefixes }
  + let autoprefixerData = { browsers: agents.agents, prefixes: dataPrefixes }

I have no idea how this problem came to be, and how to properly fix it. Might be
an incompatibility between the versions of autoprefixer and canisue-lite?

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-8-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=nb_NO.UTF-8, LC_CTYPE=nb_NO.UTF-8 (charmap=UTF-8), LANGUAGE=nb_NO:nb:no_NO:no:nn_NO:nn:da:sv
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages node-autoprefixer depends on:
ii  node-browserslist              4.17.0+~cs5.6.76-1
ii  node-caniuse-lite              1.0.30001224+dfsg-2
ii  node-normalize-range           0.1.2-2
ii  node-postcss [node-colorette]  8.2.1+~cs5.3.23-8
ii  node-postcss-value-parser      4.1.0-2
ii  nodejs                         12.22.5~dfsg-5

node-autoprefixer recommends no packages.

node-autoprefixer suggests no packages.

-- no debconf information