-error_expr_not_ok.nit:69,10--13: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:70,20--23: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:71,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:72,12--15: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:73,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:73,7--18: Type error: expected A, got Bool
-error_expr_not_ok.nit:74,15--18: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:74,7--18: Type error: expected A, got Bool
-error_expr_not_ok.nit:75,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:75,15--18: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:75,7--18: Type error: expected A, got Bool
-error_expr_not_ok.nit:76,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:76,7--19: Type error: expected A, got Bool
-error_expr_not_ok.nit:77,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:77,16--19: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:77,7--19: Type error: expected A, got Bool
-error_expr_not_ok.nit:78,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:78,16--19: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:78,7--19: Type error: expected A, got Bool
-error_expr_not_ok.nit:79,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:79,7--14: Type error: expected A, got Bool
-error_expr_not_ok.nit:80,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:81,12--15: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:81,7--15: Type error: expected A, got Bool
-error_expr_not_ok.nit:82,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:83,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:84,12--15: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:84,7--15: Type error: expected A, got Bool
-error_expr_not_ok.nit:85,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:86,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:87,26--29: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:87,7--30: Type error: expected A, got Bool
-error_expr_not_ok.nit:88,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:89,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:90,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:90,7--14: Type error: expected A, got Bool
-error_expr_not_ok.nit:91,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:92,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:93,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:93,7--14: Type error: expected A, got Bool
-error_expr_not_ok.nit:94,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:95,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:96,12--15: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:96,7--15: Type error: expected A, got Bool
-error_expr_not_ok.nit:97,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:98,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:99,12--15: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:99,7--15: Type error: expected A, got Bool
-error_expr_not_ok.nit:100,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:101,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:102,13--16: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:102,7--16: Type error: expected A, got Int
-error_expr_not_ok.nit:103,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:104,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:105,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:105,7--14: Type error: expected A, got Int
-error_expr_not_ok.nit:106,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:107,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:108,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:108,7--14: Type error: expected A, got Int
-error_expr_not_ok.nit:109,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:110,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:111,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:111,7--14: Type error: expected A, got Int
-error_expr_not_ok.nit:112,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:113,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:114,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:114,7--14: Type error: expected A, got Int
-error_expr_not_ok.nit:115,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:116,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:117,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:117,7--14: Type error: expected A, got Int
-error_expr_not_ok.nit:118,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:119,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:122,7--15: Error: Attribute _fail doesn't exists in String.
-error_expr_not_ok.nit:123,1--13: Error: Attribute _fail doesn't exists in String.
-error_expr_not_ok.nit:124,1--14: Error: Attribute _fail doesn't exists in String.
-error_expr_not_ok.nit:126,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:127,1--4: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:128,1--4: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:131,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:131,7--15: Type error: expected A, got Int
-error_expr_not_ok.nit:132,10--13: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:133,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:134,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:135,1--4: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:136,1--4: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:137,1--4: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:139,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:140,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:141,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:141,14--17: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:142,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:143,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:144,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:144,14--17: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:145,11--14: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:146,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:147,8--11: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:149,14--17: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:149,7--24: Type error: expected A, got String
-error_expr_not_ok.nit:150,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:151,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:152,7--10: Error: Method or variable 'fail' unknown in Sys.
-error_expr_not_ok.nit:152,7--18: Type error: expected A, got Bool
+error_expr_not_ok.nit:69,10--13: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:70,20--23: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:71,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:72,12--15: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:73,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:73,7--18: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:74,15--18: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:74,7--18: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:75,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:75,15--18: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:75,7--18: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:76,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:76,7--19: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:77,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:77,16--19: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:77,7--19: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:78,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:78,16--19: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:78,7--19: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:79,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:79,7--14: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:80,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:81,12--15: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:81,7--15: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:82,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:83,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:84,12--15: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:84,7--15: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:85,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:86,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:87,26--29: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:87,7--30: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:88,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:89,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:90,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:90,7--14: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:91,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:92,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:93,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:93,7--14: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:94,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:95,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:96,12--15: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:96,7--15: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:97,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:98,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:99,12--15: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:99,7--15: Type Error: expected `A`, got `Bool`.
+error_expr_not_ok.nit:100,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:101,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:102,13--16: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:102,7--16: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:103,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:104,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:105,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:105,7--14: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:106,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:107,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:108,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:108,7--14: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:109,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:110,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:111,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:111,7--14: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:112,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:113,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:114,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:114,7--14: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:115,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:116,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:117,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:117,7--14: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:118,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:119,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:122,11--15: Error: attribute `_fail` does not exist in `String`.
+error_expr_not_ok.nit:123,5--9: Error: attribute `_fail` does not exist in `String`.
+error_expr_not_ok.nit:124,5--9: Error: attribute `_fail` does not exist in `String`.
+error_expr_not_ok.nit:126,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:127,1--4: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:128,1--4: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:131,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:131,7--15: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:132,10--13: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:133,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:134,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:135,1--4: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:136,1--4: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:137,1--4: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:139,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:140,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:141,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:141,14--17: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:142,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:143,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:144,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:144,14--17: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:145,11--14: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:146,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:147,8--11: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:149,14--17: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:149,7--24: Type Error: expected `A`, got `String`.
+error_expr_not_ok.nit:150,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:150,7--18: Type Error: expected `A`, got `Int`.
+error_expr_not_ok.nit:151,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:152,7--10: Error: method or variable `fail` unknown in `Sys`.
+error_expr_not_ok.nit:152,7--18: Type Error: expected `A`, got `Bool`.