'Is the output of the following REPEAT UNTIL code complier-dependent?

Is the output of the following code compiler-dependent?

x<-10;
REPEAT UNTIL (x<10)
{
        x<-x+10;
}
DISPLAY(x);

One source says the REPEAT UNTIL part will not be executed so output will be 10, but some said the loop will be executed infinitely.

loops repeat

Sources

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