Monodevelop and visual studio detect an error, yet Unity ignores it.
Steps to reproduce:
1. Open attached project
2. Open "ElseBug.cs" script
3. Comment out 22 line which has empty else block

Result: No error in console
Expected result: 'use of unassigned variable' error should be shown regardless the else block exist or not

Note: You can make error appear by uncommenting else block in 22 line

Reproduced on: 5.5.2p2, 5.6.0f2, 2017.1.0b7