to_poly_solve causes TypeError on certain equations [closed]

edit

 sage: x, theta = var('x, theta')
 sage: assume(x > 0, theta >= 0, theta < 2 * pi)
 sage: assume(x, 'real')
 sage: assume(theta, 'real')
 sage: solve(x/cos(theta) == sqrt(sin(theta)), theta, to_poly_solve=true)

This code causes an error (below) The assume() lines seemingly aren't causing the issue (error happens without them). This code will still crash:

 sage: x, theta = var('x, theta')
 sage: solve(x/cos(theta) == sqrt(sin(theta)), theta, to_poly_solve=true)

I encountered this issue while working on a more complex equation, and this is the simplest version of the problem I could reproduce.

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[5], line 1
----> 1 solve(x/cos(theta) == sqrt(sin(theta)), theta, to_poly_solve=true)

File /usr/lib/python3.14/site-packages/sage/symbolic/relation.py:1202, in solve(f, explicit_solutions, multiplicities, to_poly_solve, solution_dict, algorithm, domain, *args)
   1199         return [[]]
   1201 if len(f) == 1:
-> 1202     return _solve_expression(f[0], x, explicit_solutions, multiplicities, to_poly_solve, solution_dict, algorithm, domain)
   1204 if algorithm == 'sympy':
   1205     from sympy import solve as ssolve

File /usr/lib/python3.14/site-packages/sage/symbolic/relation.py:1505, in _solve_expression(f, x, explicit_solutions, multiplicities, to_poly_solve, solution_dict, algorithm, domain)
   1503     s = m.to_poly_solve(x, options='algexact:true')
   1504     T = string_to_list_of_solutions(repr(s))
-> 1505     X.extend([t[0] for t in T])
   1506 except TypeError as mess:
   1507     if ignore_exceptions:

TypeError: 'sage.symbolic.expression.Expression' object is not subscriptable

I am running sagemath 10.8 with GNU/Linux