<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\cs_new:Nn
  \module_foo:n
  { #1 }
\cs_generate_variant:Nn
  \module_foo:n
  { V, v }
\module_foo:V
  \c_false_bool  % error on this line
\module_foo:v
  { c_false_bool }  % error on this line
</pre></body></html>