fix Issue 9417 - "no size yet for forward reference" error with nested structure
fix Issue 8833 - Odd error with expression tuples
fix Issue 8698 - Forward reference error with interfaces
fix Issue 8697 - Invalid error message: Forward reference of interface
Merge pull request #1851 from 9rnsr/fix9417

Issue 9417 - "no size yet for forward reference" error with nested structure
Merge pull request #1852 from 9rnsr/fix8833

Issue 8833 - Odd error with expression tuples
Merge pull request #1853 from 9rnsr/fix8698

Issue 8698 - Forward reference error with interfaces