BEGIN/END SEQUENCE causes compiler error XS0136

[Alf]

Hi to all,
after moving to 2.12.2.0 I get this compiler error:

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error XS0136: A local or parameter named 'Xs$Obj' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter

The concerned code line contains: "BEGIN SEQUENCE". Sorry for my stupidity but I don't understand this error message. I guess there are some situations BEGIN/END SEQUENCE is not allowed? How can I solve this? By the way: Same code makes no trouble in earlier X#-Versions (and also not in VO)..
Alf

[robert]

Alf,
The XS$Obj variable is generated by the compiler for RECOVER statements.
DO you have a nested Begin sequence .. end ?
As always: example code helps a lot.

Robert

[Alf]

Robert,
your guess is correct: Error XS0136 occurs here:

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BEGIN SEQUENCE
    // Some simple code
RECOVER
    BEGIN SEQUENCE ---> Error XS0136
    // some simple code
    END SEQUENCE
END SEQUENCE

Is this coding no longer allowed in 2.12.2.0?
Alf

[robert]

Alf,
It should be allowed, but is a bit unexpected.
The problem is that the compiler in the current build generates a temporary variable for both sequence blocks with the same name.
I'll change the compiler to make sure that no duplicate names are generated for the next build.
For now I would recommend to replace the inner begin sequence .. end sequence with a

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try 
.. your statements
catch 
   throw
end try

Robert

[Alf]

Hi Robert,
thanks for answer and advise.
Alf

[robert]

Alf,
logged as https://github.com/X-Sharp/XSharpPublic/issues/1055

Robert