Before
Entering a
Entering b
Entering c
Hello, world.
Exiting c with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
Exiting b with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
Exiting a with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
After
Before
Entering a
Entering b
Entering c
Hello, world.
Exiting c with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
Exiting b with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
Exiting a with [<class 'NoneType'>, <class 'NoneType'>, <class 'NoneType'>]
After
Before
Entering a
Entering b
Entering c
Prior
Exiting c with [<class 'type'>, <class 'ValueError'>, <class 'list'>]
Exiting b with [<class 'type'>, <class 'ValueError'>, <class 'list'>]
Exiting a with [<class 'type'>, <class 'ValueError'>, <class 'list'>]
Raised ValueError('oh no')