| ### Compilation failed: | |
| error: 4: symbol 'x' was already defined | |
| error: 5: symbol 'x' was already defined | |
| error: 6: symbol 'x' was already defined | |
| error: 7: symbol 'x' was already defined | |
| error: 11: symbol 'y' was already defined | |
| error: 12: symbol 'y' was already defined | |
| error: 13: symbol 'y' was already defined | |
| error: 14: symbol 'y' was already defined | |
| 8 errors |