YAML surface phase requires kinetics model

[speth]

Problem description

For bulk phases, the default behavior if no kinetics field is specified in the YAML phase definition is to just instantiate the base Kinetics class. However, this does not work for interface phases.

Steps to reproduce

For the YAML input (say, test.yaml):

phases:
- name: test
  thermo: ideal-surface
  species: [{ptcombust.yaml/species: all}]
  state: {T: 300, P: 1 atm}

Importing in Python yields the exception:

p = ct.Solution("test.yaml")

File build/python/cantera/base.pyx:63, in cantera._cantera._SolutionBase.__cinit__()

File build/python/cantera/base.pyx:120, in cantera._cantera._SolutionBase._cinit()

File build/python/cantera/base.pyx:207, in cantera._cantera._SolutionBase._init_yaml()

CanteraError: 
*******************************************************************************
CanteraError thrown by Interface::setKinetics:
Kinetics object of type 'None' does not descend from InterfaceKinetics.
*******************************************************************************

Trying to load with ct.Interface yields the same exception.

In Cantera 2.5.1, loading the phase with ct.Solution worked, while using ct.Interface failed with the exception:

TypeError: Underlying Kinetics class is not of the correct type.

I expect that the same issue would occur using the C++ newInterface() constructor.

System information

• Cantera version: 2.6.0b2 / e7b931b
• OS: macOS 12.2, though I assume this is universal
• Python/MATLAB/other software versions: Python 3.10