Compile-time errors instead of internal errors.

tests/co19/co19-kernel.status

Index: tests/co19/co19-kernel.status
diff --git a/tests/co19/co19-kernel.status b/tests/co19/co19-kernel.status
index 7fe4919b8739261cc9d9bc383e34016f28b3cf2f..afe1618dbcbde896cff8d41c038152c0a866db16 100644
--- a/tests/co19/co19-kernel.status
+++ b/tests/co19/co19-kernel.status
@@ -132,9 +132,6 @@ Language/Enums/restrictions_t05: MissingCompileTimeError
 Language/Enums/restrictions_t06: MissingCompileTimeError
 Language/Enums/restrictions_t07: MissingCompileTimeError
 Language/Enums/restrictions_t08: MissingCompileTimeError
-Language/Expressions/Assignable_Expressions/syntax_t04: DartkCrash
-Language/Expressions/Assignable_Expressions/syntax_t05: DartkCrash
-Language/Expressions/Assignable_Expressions/syntax_t23: DartkCrash
 Language/Expressions/Assignment/expression_assignment_failed_t03: RuntimeError
 Language/Expressions/Assignment/expression_assignment_t07: RuntimeError
 Language/Expressions/Assignment/no_such_method_t01: RuntimeError
@@ -296,8 +293,6 @@ Language/Expressions/Numbers/syntax_t26: MissingCompileTimeError
 Language/Expressions/Numbers/syntax_t27: MissingCompileTimeError
 Language/Expressions/Numbers/syntax_t29: MissingCompileTimeError
 Language/Expressions/Postfix_Expressions/syntax_t06: MissingCompileTimeError
-Language/Expressions/Postfix_Expressions/syntax_t07: DartkCrash
-Language/Expressions/Postfix_Expressions/syntax_t08: DartkCrash
 Language/Expressions/Property_Extraction/Super_Getter_Access_and_Method_Closurization/no_such_method_t01: RuntimeError
 Language/Expressions/Property_Extraction/Super_Getter_Access_and_Method_Closurization/no_such_method_t02: RuntimeError
 Language/Expressions/This/placement_t04: MissingCompileTimeError
@@ -314,8 +309,6 @@ Language/Expressions/Type_Cast/syntax_t02: MissingCompileTimeError
 Language/Expressions/Type_Test/evaluation_t03: RuntimeError
 Language/Expressions/Type_Test/evaluation_t04: RuntimeError
 Language/Expressions/Type_Test/evaluation_t10: RuntimeError # Kernel Issue 28335 (deferred libraries)
-Language/Expressions/Unary_Expressions/syntax_t06: DartkCrash
-Language/Expressions/Unary_Expressions/syntax_t07: DartkCrash
 Language/Expressions/Unary_Expressions/syntax_t08: MissingCompileTimeError
 Language/Expressions/Unary_Expressions/syntax_t09: MissingCompileTimeError
 Language/Functions/External_Functions/not_connected_to_a_body_t01: RuntimeError # Dartk Issue 28565