Client message serialization fails, language server is never initialized

[aci2n]

Describe the bug The client message to initialize the language server is not sent because an error occurs during serialization: LSP :: Sending to process failed with the following error: Wrong type argument: json-value-p, set-from-style

From what I could see, this happens when lsp-mode tries to initialize.

The variable lsp-java-format-tab-size uses 'c-basic-offset that has 'set-from-style as default value.

(lsp-defcustom lsp-java-format-tab-size 'c-basic-offset
  "The basic offset"
  :type 'symbol
  :lsp-path "java.format.tabSize")

Setting 'c-basic-offset to a number prevents the serialization error.

I am getting this error in my linux machine only, with latest emacs from git. GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38, cairo version 1.17.8) of 2023-05-23 Note: I don't remember getting the same error in emacs 28 so I suspect it might be specific to emacs 30.

lsp-java version: Version: 20230507.517 Commit: https://github.com/emacs-lsp/lsp-java/commit/961f1a13e3db9a6b395584be99ef9572bb414e63

To Reproduce Try to connect any java buffer to the language server. Server process starts, but never receives the initialize request.

Expected behavior The language server is initialized.

Logs

LSP :: Restarting LSP in buffer App.java
using config for config_linux
LSP :: Sending to process failed with the following error: Wrong type argument: json-value-p, set-from-style
LSP :: Connected to [jdtls:899939/starting /home/i2n/code/test].

[goldfita]

Setting c-basic-offset to a number works for me as well.