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Wez Furlong
332595ee2a
We had an issue where a typo resulted in a relatively inscrutable
error at runtime:
```lua
local queue_helper = queue_module:setup ('/opt/kumomta/etc/policy/queues.toml')
```
produced this:
```
problem initializing: call validate_config callback: runtime error: /opt/kumomta/share/policy-extras/queue.lua:602: bad argument #1 to 'for iterator' (table expected, got nil)
stack traceback:
[C]: in function 'next'
/opt/kumomta/share/policy-extras/queue.lua:602: in function </opt/kumomta/share/policy-extras/queue.lua:551>
Error: Initialization raised an error: call validate_config callback: runtime error: /opt/kumomta/share/policy-extras/queue.lua:602: bad argument #1 to 'for iterator' (table expected, got nil)
stack traceback:
[C]: in function 'next'
/opt/kumomta/share/policy-extras/queue.lua:602: in function </opt/kumomta/share/policy-extras/queue.lua:551>
```
with the changes in this commit we'll present this issue like this,
during server startup, which points a little more clearly at the setup
call and the file names parameter, and suggests more strongly that it
should be a list of strings (or config objects):
```
runtime error: [string "./simple_policy.lua"]:52: assets/policy-extras/queue.lua:463 QueueHelperSetup: invalid value for field 'file_names'
assets/policy-extras/queue.lua:463 Expected value of type 'list<variant<string,QueueHelperConfig>>' but got type 'string' '/opt/kumomta/etc/policy/queues.toml'
stack traceback:
[C]: in function 'error'
assets/policy-extras/typing.lua:78: in method 'raise'
assets/policy-extras/typing.lua:249: in metamethod 'newindex'
assets/policy-extras/typing.lua:258: in function <assets/policy-extras/typing.lua:253>
(...tail calls...)
assets/policy-extras/queue.lua:463: in function 'policy-extras.queue.setup_with_options'
(...tail calls...)
[string "./simple_policy.lua"]:52: in main chunk
```
this change actually surfaced a minor issue in the ndr.lua file that is
part of an integration test, as well as in my adhoc simple_policy file.