"edit script refers to line past end of file" false report?

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Hi,

I'm going through some ancient source archives and I have noticed that some
files report the above mentioned message.

To be precise, I got there when another tool (cvs-fast-export) started to
report failures and found explanation from Eric:
https://gitlab.com/esr/cvs-fast-export/-/issues/1#note_25788748 about its
true cause.

First I was prepared to accept my fate (out of desperation I even dug out
an emulator with 16-bit RCS 5.6, only to confirm that the same error is
present there) but then I looked closely at the file (attached) -- there's
no way there is any integer overflow happening.

This concrete file for example:

co -p1.6 rdb.c works

co -p1.5 rdb.c works

co -p1.4 rdb.c reports:
co: ./rdb.rc,v:91: edit script refers to line past end of file

What is really weird because the line is just simple "@d1 3" which should
be something like "delete 3 lines starting at line 1", right? So where does
that error come from?

Any hint appreciated.

Regards,
Miro

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<div dir=3D"ltr">Hi,<div dir=3D"ltr" class=3D"gmail_signature" data-smartma=
il=3D"gmail_signature"><div dir=3D"ltr"></div></div><div><br></div><div>I&#=
39;m going through some ancient source archives and I have noticed that som=
e files report the above mentioned message.=C2=A0</div><div><br></div><div>=
To be precise, I got there when another tool (cvs-fast-export) started to r=
eport failures and found explanation from Eric:=C2=A0<a href=3D"https://git=
lab.com/esr/cvs-fast-export/-/issues/1#note_25788748">https://gitlab.com/es=
r/cvs-fast-export/-/issues/1#note_25788748</a> about its true cause.</div><=
div><br></div><div>First I was prepared to accept my fate (out of desperati=
on I even dug out an emulator with 16-bit RCS 5.6, only to confirm that the=
 same error is present there) but then I looked closely at the file (attach=
ed) -- there&#39;s no way there is any integer overflow=C2=A0happening.=C2=
=A0</div><div><br></div><div>This concrete file for example:</div><div><br>=
</div><div>co -p1.6 rdb.c works</div><div><br></div><div>co -p1.5 rdb.c wor=
ks<br></div><div><br></div><div>co -p1.4 rdb.c reports:<br></div><div>co: .=
/rdb.rc,v:91: edit script refers to line past end of file<br></div><div><br=
></div><div>What is really weird because the line is just simple &quot;@d1 =
3&quot; which should be something=C2=A0like &quot;delete 3 lines starting a=
t line 1&quot;, right? So where does that error come from?</div><div><br></=
div><div>Any hint appreciated.</div><div><br></div><div>Regards,</div><div>=
Miro</div></div>

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