[Bug]: lsp-utils.adb:205:42: error: "Bytes_Buffer" not declared in "Common"

[Blady-Com]

Environment

• OS and Version: macOS 13.6, Xcode 14.3, GNAT FSF 15.1.0 (from Alire)
• IDE Version: none
• Ada & SPARK Extension Version: none

Bug Summary and Reproducer

Bug Summary:
lsp-utils.adb:205:42: error: "Bytes_Buffer" not declared in "Common"

Steps to reproduce:
Get ALS source from als-26.0w-20250417-16239-src.
Launch make:

make BUILD_MODE=prod VERSION=26.0 BUILD_DATE=20250712
...
gprbuild -m -j0  -XSUPERPROJECT= -P gnat/lsp_server.gpr -p -XBUILD_MODE=prod -XLSP_OS=osx -XLIBRARY_TYPE=relocatable -XXMLADA_BUILD=relocatable -XGPR_BUILD=relocatable \
	-XVERSION=26.0 -XBUILD_DATE=20250712 
lsp_server.gpr:19:09: warning: there are no sources of language "C++" in this project
Compile
   [Ada]          lsp-ada_driver.adb
...
   [Ada]          lsp-utils.adb
lsp-utils.adb:205:42: error: "Bytes_Buffer" not declared in "Common"

Expected behavior:
Correct compilation with:
205 (Kind => Langkit_Support.Types.Bytes_Buffer,

Configuration and Logs

None

Other VS Code Extensions

No response

Additional context

No response

[eliericha]

Hello @Blady-Com ,

Could you clarify, where did you get the source package als-26.0w-20250417-16239-src?

And how did you obtain the sources of the dependencies such as Libadalang and Langkit?

The error you are seeing looks like a mismatch of versions between the ALS and its dependencies.

[Blady-Com]

All sources come from GNAT Studio 26.0 with Linux archive.