why gambas3 add automatically variable declaration?

[roberto.premoli@xxxxxxxxxx]

hello all,

gambas version: 3.18.0 (on Debian 12)

problem:
sometimes it happens that some global variable are automatically
re-declared locally inside some pubblic sub function().
Of course local
variable take control diring whe woking time of the local ffunctiongoes
to override the value of the same variable I set at the beginning of
code in "declaration" session.

this behaviour gave me headhache for one
week for bug hunting (ok, my fault to not read the warning message
during comping time).
But really, i dont undestand this behaviour of
gambas3. if a variable declaration is missed, is way long better that
program stops and advise "declaration missing" or something like that:
silent add of declaration is not the way in my opinion: coder must know
he forgot to declare, gambas should not do it silently. 

if the
variable ALREADY exist, why gambas add it silently and in automatic
mode?

there are same parameter to set into the gambas configuration to
avoid this?

There is some I did wrong?
Thanks,

Roberto