false positive in nested noreturn algorithm

[alaviss]

Example

let x =
  if true:
    1
  else:
    if true:
      echo "fun"
    else:
      raise newException(Defect, "gone")

Actual Output

Complies successfully

Expected Output

Should not compile at all

Possible Solution

This should be changed to verify that either it has a type (a real expression), or all branches must ends with noreturn.

nimskull/compiler/ast/ast_query.nim

Lines 703 to 704 in 677964c

	of nkIfStmt, nkCaseStmt:
	it = it.lastSon.lastSon