Error: can raise an unlisted exception

[andreaferretti]

Apparently, this arises when trying to serialize anything that contains a table. A small example would be

import streams, yaml, tables

var
  t = {"a": "b"}.newTable()
  s = newFileStream("test.yaml", fmWrite)
dump(t, s)
s.close()

It seems that this happens because representChild is explicit defined not to raise exceptions, but accessing table keys can raise KeyError.

I think one should either catch that exception, or remove the explicit pragma {. raises: [] .} and let the compiler infer effects

[flyx]

Yeah, exception handling seems to have been improved a bit since 0.13.1 and detects things it didn't when I wrote the code :). I'll fix it tomorrow.

Also, this indicates NimYAML needs more tests.

[flyx]

This is an interesting one. I do not see how the source line the compiler complains about can raise this exception, and I also cannot wrap it with try/catch - the compiler still complains.

Accessing table keys is done with the pairs iterator which does not yield a KeyError.

Might be a compiler regression, or something so subtle I did not find it yet. I do not want to lose the guarantee {. raises [] .} everywhere. Will need some time to figure it out.

[flyx]

This was one badass bug.