Question: a new problem in latex() command

I installed Physics package 368 and when I run a test, I found that now the latex() command fails with internal  error which I have never seen before. I think this is first time I see latex() gives an error.

restart

lap:=VectorCalculus:-Laplacian(u(r,z,t),'cylindrical'[r,theta,z]):
bc:=u(r,0,t)=0,u(r,H,t)=0, u(a,z,t)=0:
ic:=u(r,z,0) = f(r,z):
sol:=pdsolve([diff(u(r,z,t),t) = k*lap,bc,ic],u(r,z,t)) assuming a>0,r<a,H>0,k>0;
latex(sol);

u(r, z, t) = `casesplit/ans`(Sum(Sum(4*BesselJ(0, lambda[n1]*r/a)*sin(n*Pi*z/H)*exp(-k*t*(Pi^2*a^2*n^2+H^2*lambda[n1]^2)/(a^2*H^2))*(Int(BesselJ(0, lambda[n1]*r/a)*r*(Int(sin(n*Pi*z/H)*f(r, z), z = 0 .. H, AllSolutions)), r = 0 .. a, AllSolutions))/(H*a^2*hypergeom([1/2], [1, 2], -lambda[n1]^2)), n = 1 .. infinity), n1 = 1 .. infinity), {And(lambda[n1] = BesselJZeros(0, n1), 0 <= lambda[n1])})

Error, (in latex/int) invalid arguments

lprint(sol)

u(r,z,t) = `casesplit/ans`(Sum(Sum(4*BesselJ(0,lambda[n1]/a*r)*sin(n/H*Pi*z)*
exp(-k*t*(Pi^2*a^2*n^2+H^2*lambda[n1]^2)/a^2/H^2)*Int(BesselJ(0,lambda[n1]/a*r)
*r*Int(sin(n/H*Pi*z)*f(r,z),z = 0 .. H,AllSolutions),r = 0 .. a,AllSolutions)/H
/a^2/hypergeom([1/2],[1, 2],-lambda[n1]^2),n = 1 .. infinity),n1 = 1 ..
infinity),{And(lambda[n1] = BesselJZeros(0,n1),0 <= lambda[n1])})

 


 

Download bug_june_6_2019.mw

Is this a new bug? Why latex() command now fails? It failed on the above output. When I try latex() on simpler output. no error is generated. So something to do with the above specific output seems to be the issue.

Maple 2019.1 using Physics 368 on windows 10.

 

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