languageserver no longer starts in renv projects unless listed in renv.lock

[PMassicotte]

Hi,

Since the recent breaking changes in Mason, I've noticed that the R language server (languageserver) no longer starts in projects using renv unless it's explicitly included in the renv.lock file.

:LspInfo:

[ERROR][2025-05-08 07:16:38] ...p/_transport.lua:36	"rpc"	"R"	"stderr"	"Error in loadNamespace(x) : there is no package called ‘languageserver’\nCalls: loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart\nExecution halted\n"

• This issue only occurs in renv projects.
• It works fine in non-renv projects.
• It also works if I manually install languageserver and snapshot it into the renv.lock file.
• Prior to the latest Mason update, this step wasn't necessary — languageserver would run even if it wasn't in the project's lockfile.

Is this expected behavior with the latest changes? If so, is there a recommended way to ensure smoother integration with renv-based projects?

Thanks,
Phil