Confusing scoping of variable

[Koushikphy]

Let's check this simple code

module mod1
    implicit none
    private
    integer :: x = 10
end module mod1


program name
    use mod1 
    implicit none
    call test()
    contains 
    subroutine test()
        integer :: x
        print *, x
    end 
end program name

Now for this code, the linter shows warning (for the declaration statement inside that subroutine)

Variable "x" masks variable in parent scope

But the x in the module is private, so the subroutine declaration should not mask anything. Am I missing something here or is it a bug?
I'm using GNU Fortran (GCC) 11.2.0 on windows (through cygwin)

[gnikit]

That is strange. It does not seem to be a bug on the server side but it could be an issue with your configuration (fortls reading symbols from other files). I would be interested in seeing your parser and diagnostics outputs. In a terminal type

fortls --debug_filepath tmp.f90 --debug_rootpath .  --debug_diagnostics

and

fortls --debug_filepath tmp.f90 --debug_rootpath .  --debug_parser

and reply with the outputs.

What you should be seeing is something along these lines

Testing "initialize" request:
  Root = "."
[INFO - 08:35:41] fortls - Fortran Language Server 2.10.0 Initialized
  Successful!

  Source directories:
    /home/gn/Code/Fortran/demo

Testing "textDocument/publishDiagnostics" notification:
  File = "tmp.f90"

No errors or warnings

Testing parser
  File = "tmp.f90"
  Detected format: free

=========
Parser Output
=========

=== No PreProc ===

module mod1 !!! MODULE - Ln:1
    implicit none !!! IMPLICIT - Ln:2
    private !!! VISIBILITY - Ln:3
    integer :: x = 10 !!! VARIABLE - Ln:4
end module mod1 !!! END MODULE Scope - Ln:5
program name !!! PROGRAM - Ln:8
    use mod1  !!! USE - Ln:9
    implicit none !!! IMPLICIT - Ln:10
    contains  !!! CONTAINS - Ln:12
    subroutine test() !!! SUBROUTINE - Ln:13
        integer :: x !!! VARIABLE - Ln:14
    end  !!! END  Scope - Ln:16
end program name !!! END PROGRAM Scope - Ln:17

=========
Object Tree
=========

1: mod1
  6: mod1::x
1: name
  2: name::test
    6: name::test::x
2: name::test
  6: name::test::x

=========
Exportable Objects
=========

1: mod1
1: name

[Koushikphy]

These are the output

Testing "initialize" request:
  Root = "."
  Succesful!

  Source directories:
    .

Testing "textDocument/publishDiagnostics" notification:
  File = "test.f90"

Reported errors or warnings:
     13:WARNING  "Variable "x" masks variable in parent scope"

and

Testing parser
  File = "test.f90"    
  Detected format: free

=========
Parser Output
=========

=== No PreProc ===     

module mod1 !!! MODULE statement(1)
implicit none !!! IMPLICIT statement(2)
integer :: x = 10 !!! VARIABLE statement(4)
end module mod1 !!! END "MODULE" scope(5)
program name !!! PROGRAM statement(8)
use mod1 !!! USE statement(9)
implicit none !!! IMPLICIT statement(10)
contains !!! CONTAINS statement(12)
subroutine test() !!! SUBROUTINE statement(13)
integer :: x !!! VARIABLE statement(14)
end !!! END "None" scope(16)
end program name !!! END "PROGRAM" scope(17)

=========
Object Tree
=========

1: mod1
  6: mod1::x
1: name
  2: name::test
    6: name::test::x
2: name::test
  6: name::test::x

=========
Exportable Objects
=========

1: mod1
1: name

[gnikit]

What version of fortls are you using? These outputs do not match the output format of the latest fortls version. See the difference on how line numbers are reported and how your version number is missing.
Install instructions

[Koushikphy]

You were right. I was using an old version of fortls. Once I upgraded to the latest version the warning was gone.