<s>
In	O
the	O
design	O
of	O
programming	O
languages	O
,	O
an	O
erroneous	B-Language
program	I-Language
is	O
one	O
whose	O
semantics	O
are	O
not	O
well-defined	O
,	O
but	O
where	O
the	O
language	O
implementation	O
is	O
not	O
obligated	O
to	O
signal	O
an	O
error	O
either	O
at	O
compile	O
or	O
at	O
execution	O
time	O
.	O
</s>
<s>
For	O
example	O
,	O
in	O
Ada	B-Language
:	O
</s>
<s>
that	O
a	O
global	O
variable	O
refers	B-Application
to	I-Application
the	I-Application
same	I-Application
object	I-Application
as	O
a	O
subroutine	O
parameter	O
)	O
but	O
may	O
nonetheless	O
depend	O
on	O
a	O
condition	O
being	O
true	O
in	O
defining	O
the	O
semantics	O
of	O
the	O
program	O
.	O
</s>
