Submitted by: @asfernandes

Is related to QA552

Test case:

-------------
create domain dn integer not null!

execute block
as
declare variable a integer;
declare variable b integer;
declare variable c integer;
declare variable d integer;
declare variable e integer;
declare variable f integer;
declare variable g integer;
declare variable h integer;
declare variable i integer;
declare variable j integer;
declare variable a1 integer;
declare variable b1 integer;
declare variable c1 integer;
declare variable d1 integer;
declare variable e1 integer;
declare variable f1 integer;
declare variable g1 integer;
declare variable h1 integer;
declare variable i1 integer;
declare variable j1 integer;
declare variable a2 integer;
declare variable b2 integer;
declare variable c2 integer;
declare variable d2 integer;
declare variable e2 integer;
declare variable f2 integer;
declare variable g2 integer;
declare variable h2 integer;
declare variable i2 integer;
declare variable j2 integer;
declare variable a3 integer;
declare variable b3 integer;
declare variable c3 integer;
declare variable d3 integer;
declare variable e3 integer;
declare variable f3 integer;
declare variable g3 integer;
declare variable h3 integer;
declare variable i3 integer;
declare variable j3 integer;
declare variable a10 integer;
declare variable b10 integer;
declare variable c10 integer;
declare variable d10 integer;
declare variable e10 integer;
declare variable f10 integer;
declare variable g10 integer;
declare variable h10 integer;
declare variable i10 integer;
declare variable j10 integer;
declare variable a20 integer;
declare variable b20 integer;
declare variable c20 integer;
declare variable d20 integer;
declare variable e20 integer;
declare variable f20 integer;
declare variable g20 integer;
declare variable h20 integer;
declare variable i20 integer;
declare variable j20 integer;
declare variable a30 integer;
declare variable b30 integer;
declare variable c30 integer;
declare variable d30 integer;
declare variable e30 integer;
declare variable f30 integer;
declare variable g30 integer;
declare variable h30 integer;
declare variable i30 integer;
declare variable j30 integer;
declare variable a11 integer;
declare variable b11 integer;
declare variable c11 integer;
declare variable d11 integer;
declare variable e11 integer;
declare variable f11 integer;
declare variable g11 integer;
declare variable h11 integer;
declare variable i11 integer;
declare variable j11 integer;
declare variable a21 integer;
declare variable b21 integer;
declare variable c21 integer;
declare variable d21 integer;
declare variable e21 integer;
declare variable f21 integer;
declare variable g21 integer;
declare variable h21 integer;
declare variable i21 integer;
declare variable j21 integer;
declare variable a31 integer;
declare variable b31 integer;
declare variable c31 integer;
declare variable d31 integer;
declare variable e31 integer;
declare variable f31 integer;
declare variable g31 integer;
declare variable h31 integer;
declare variable i31 integer;
declare variable j31 integer;
declare variable a12 integer;
declare variable b12 integer;
declare variable c12 integer;
declare variable d12 integer;
declare variable e12 integer;
declare variable f12 integer;
declare variable g12 integer;
declare variable h12 integer;
declare variable i12 integer;
declare variable j12 integer;
declare variable a22 integer;
declare variable b22 integer;
declare variable c22 integer;
declare variable d22 integer;
declare variable e22 integer;
declare variable f22 integer;
declare variable g22 integer;
declare variable h22 integer;
declare variable i22 integer;
declare variable j22 integer;
declare variable a32 integer;
declare variable b32 integer;
declare variable c32 integer;
declare variable d32 integer;
declare variable e32 integer;
declare variable f32 integer;
declare variable g32 integer;
declare variable h32 integer;
declare variable i32 integer;
declare variable j32 integer;
declare variable a100 integer;
declare variable b100 integer;
declare variable c100 integer;
declare variable d100 integer;
declare variable e100 integer;
declare variable f100 integer;
declare variable g100 integer;
declare variable h100 integer;
declare variable i100 integer;
declare variable j100 integer;
declare variable a200 integer;
declare variable b200 integer;
declare variable c200 integer;
declare variable d200 integer;
declare variable e200 integer;
declare variable f200 integer;
declare variable g200 integer;
declare variable h200 integer;
declare variable i200 integer;
declare variable j200 integer;
declare variable a300 integer;
declare variable b300 integer;
declare variable c300 integer;
declare variable d300 integer;
declare variable e300 integer;
declare variable f300 integer;
declare variable g300 integer;
declare variable h300 integer;
declare variable i300 integer;
declare variable j300 integer;
declare variable a110 integer;
declare variable b110 integer;
declare variable c110 integer;
declare variable d110 integer;
declare variable e110 integer;
declare variable f110 integer;
declare variable g110 integer;
declare variable h110 integer;
declare variable i110 integer;
declare variable j110 integer;
declare variable a210 integer;
declare variable b210 integer;
declare variable c210 integer;
declare variable d210 integer;
declare variable e210 integer;
declare variable f210 integer;
declare variable g210 integer;
declare variable h210 integer;
declare variable i210 integer;
declare variable j210 integer;
declare variable a310 integer;
declare variable b310 integer;
declare variable c310 integer;
declare variable d310 integer;
declare variable e310 integer;
declare variable f310 integer;
declare variable g310 integer;
declare variable h310 integer;
declare variable i310 integer;
declare variable j310 integer;
declare variable a120 integer;
declare variable b120 integer;
declare variable c120 integer;
declare variable d120 integer;
declare variable e120 integer;
declare variable f120 integer;
declare variable g120 integer;
declare variable h120 integer;
declare variable i120 integer;
declare variable j120 integer;
declare variable a220 integer;
declare variable b220 integer;
declare variable c220 integer;
declare variable d220 integer;
declare variable e220 integer;
declare variable f220 integer;
declare variable g220 integer;
declare variable h220 integer;
declare variable i220 integer;
declare variable j220 integer;
declare variable a320 integer;
declare variable b320 integer;
declare variable c320 integer;
declare variable d320 integer;
declare variable e320 integer;
declare variable f320 integer;
declare variable g320 integer;
declare variable h320 integer;
declare variable i320 integer;
declare variable j320 integer;
declare variable a1000 integer;
declare variable b1000 integer;
declare variable c1000 integer;
declare variable d1000 integer;
declare variable e1000 integer;
declare variable f1000 integer;
declare variable g1000 integer;
declare variable h1000 integer;
declare variable i1000 integer;
declare variable j1000 integer;
declare variable a2000 integer;
declare variable b2000 integer;
declare variable c2000 integer;
declare variable d2000 integer;
declare variable e2000 integer;
declare variable f2000 integer;
declare variable g2000 integer;
declare variable h2000 integer;
declare variable i2000 integer;
declare variable j2000 integer;
declare variable a3000 integer;
declare variable b3000 integer;
declare variable c3000 integer;
declare variable d3000 integer;
declare variable e3000 integer;
declare variable f3000 integer;
declare variable g3000 integer;
declare variable h3000 integer;
declare variable i3000 integer;
declare variable j3000 integer;
declare variable a1100 integer;
declare variable b1100 integer;
declare variable c1100 integer;
declare variable d1100 integer;
declare variable e1100 integer;
declare variable f1100 integer;
declare variable g1100 integer;
declare variable h1100 integer;
declare variable i1100 integer;
declare variable j1100 integer;
declare variable a2100 integer;
declare variable b2100 integer;
declare variable c2100 integer;
declare variable d2100 integer;
declare variable e2100 integer;
declare variable f2100 integer;
declare variable g2100 integer;
declare variable h2100 integer;
declare variable i2100 integer;
declare variable j2100 integer;
declare variable a3100 integer;
declare variable b3100 integer;
declare variable c3100 integer;
declare variable d3100 integer;
declare variable e3100 integer;
declare variable f3100 integer;
declare variable g3100 integer;
declare variable h3100 integer;
declare variable i3100 integer;
declare variable j3100 integer;
declare variable a1200 integer;
declare variable b1200 integer;
declare variable c1200 integer;
declare variable d1200 integer;
declare variable e1200 integer;
declare variable f1200 integer;
declare variable g1200 integer;
declare variable h1200 integer;
declare variable i1200 integer;
declare variable j1200 integer;
declare variable a2200 integer;
declare variable b2200 integer;
declare variable c2200 integer;
declare variable d2200 integer;
declare variable e2200 integer;
declare variable f2200 integer;
declare variable g2200 integer;
declare variable h2200 integer;
declare variable i2200 integer;
declare variable j2200 integer;
declare variable a3200 integer;
declare variable b3200 integer;
declare variable c3200 integer;
declare variable d3200 integer;
declare variable e3200 integer;
declare variable f3200 integer;
declare variable g3200 integer;
declare variable h3200 integer;
declare variable i3200 integer;
declare variable j3200 dn;
begin
j3200 = null;
end!
-------------

Wrong error:
Statement failed, SQLSTATE = 42000
validation error for variable number 310, value "*** null ***"

Commits: d2161dc