Invalid Declarations

All errors should be collected, printed and exit with 1.

Malformed YAML:

---
id: fn1
fail
...
1 + 1

Empty YAML:

---
...
1 + 1

Empty YAML and code:

---
...

Misses id:

---
identifier: fn1
...
1 + 1

Wrong id (doesn't starts with %a):

---
id: 1
...
1 + 1

Wrong id (doesn't follows with [_%w]):

---
id: f-1
...
1 + 1

Wrong id (more than 1 word):

---
id: f n1
...
1 + 1

Invalid value:

---
id: fn1
shift: "true"
...
1 + 1

Invalid path:

---
id: fn1
dump: invalid/path.txt
...
1 + 1

Extra key:

---
id: fn1
language: fennel
...
1 + 1

Uknown lang:

---
id: fn1
lang: fail
...
1 + 1

Uknown cmd:

---
id: fn1
cmd: piton -E -X utf8
...
1 + 1

Empty code:

---
id: fn1
...

Misses arg:

---
id: fn1
...
#a + #b

Infinite loop:

---
id: fn1
args:
  x: 1
...
`fn1(2)` * #x

Invalid code:

---
id: fn1
...
false + false

Declarations With Invalid Calls:

---
id: fn1
typed: true
args:
  a: 1
  b: 2
...
#a * #b