Unclear grammar for global in 5.5

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Hello,

Lua 5.5 BNF grammar contains rules for "local" and "global" names:

stat ::=3D  =E2=80=98;=E2=80=99 |=20
<snipped>
 local attnamelist [=E2=80=98=3D=E2=80=99 explist] |=20
 global attnamelist |
<snipped>

I'm confused by the absence of the "[=E2=80=98=3D=E2=80=99 explist]" in the=
 rule for "global".
It seems that the code below is syntactically incorrect:

global a, b =3D 1, 2
or=20
global a =3D 1
or
global <const> a =3D 1

However, the chunks above are successfully accepted by Lua:

$ ./lua -e "global a, b =3D 1, 2"; echo $?
0
$ ./lua -e "global a =3D 1"; echo $?
0
$ ./lua -e "global <const> a =3D 1"; echo $?
0

Where is a truth?

Also, it is suspicious that chunk below does not work:

$ ./lua -e "global a; print()"
./lua: (command line):1: variable 'print' not declared

The same with "local" works fine:

$ ./lua -e "local a; print()"; echo $?
0

Version: PUC Rio Lua 5.5, 84938a7d2b680d2d28ec99606e84fe712efd9a69

1. https://www.lua.org/manual/5.5/manual.html#9

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<div>Hello,</div><div><br /></div><div>Lua 5.5 BNF grammar contains rules f=
or "local" and "global" names:</div><div><br /></div><div><span style=3D"wh=
ite-space: pre;">	</span>stat ::=3D =C2=A0=E2=80=98;=E2=80=99 | <br />&lt;s=
nipped&gt;<span style=3D"white-space: pre;"></span><br /><span style=3D"whi=
te-space: pre;">		</span>=C2=A0local attnamelist [=E2=80=98=3D=E2=80=99 exp=
list] | <br /><span style=3D"white-space: pre;">		</span>=C2=A0global attna=
melist |</div><div>&lt;snipped&gt;<span style=3D"white-space: pre;"></span>=
</div><div><br /></div><div><span lang=3D"en"><span><span>I'm confused by t=
he absence of the "</span></span></span>[=E2=80=98=3D=E2=80=99 explist]<spa=
n lang=3D"en"><span><span>" in the rule for "global".</span></span></span><=
/div><div><span lang=3D"en"><span><span>It seems that the code below is syn=
tactically incorrect:</span></span></span></div><div><span lang=3D"en"><spa=
n><span><br /></span></span></span></div><div>global a, b =3D 1, 2</div><di=
v>or=C2=A0</div><div><span>global a =3D 1</span></div><div><span>or</span><=
/div><div><span>global &lt;const&gt; a =3D 1</span></div><div><span><br /><=
/span></div><div><span>However, the chunks above are successfully accepted =
by Lua:</span></div><div><span><br /></span></div><div>$ ./lua -e "global a=
, b =3D 1, 2"; echo $?<br />0<br />$ ./lua -e "global a =3D 1"; echo $?<br =
/>0<br />$ ./lua -e "global &lt;const&gt; a =3D 1"; echo $?<br />0<br /><br=
 /></div><div>Where is a truth?</div><div><br /></div><div>Also, it is susp=
icious that chunk below does not work:</div><div><br /></div><div>$ ./lua -=
e "global a; print()"<br />./lua: (command line):1: variable 'print' not de=
clared<br /><br /></div><div>The same with "local" works fine:</div><div><b=
r /></div><div>$ ./lua -e "local a; print()"; echo $?<br />0<br /><br /></d=
iv><div>Version: PUC Rio Lua 5.5,=C2=A084938a7d2b680d2d28ec99606e84fe712efd=
9a69</div><div><br /></div><div>1.=C2=A0https://www.lua.org/manual/5.5/manu=
al.html#9</div>

<p></p>

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