Change UNDEFINED_FUNCTION from an error to a warning (issues 18274, 15315).

tests/language/language_analyzer.status

Index: tests/language/language_analyzer.status
diff --git a/tests/language/language_analyzer.status b/tests/language/language_analyzer.status
index bf3aa34a58c13f397d202f6cd5e898242bc58562..1666a9580490e909aca02e8f76685cae151d7bcc 100644
--- a/tests/language/language_analyzer.status
+++ b/tests/language/language_analyzer.status
@@ -9,13 +9,6 @@ closure_call_wrong_argument_count_negative_test: skip
 # Test issue 12694 (was analyzer issue), (1) when "abstract" is import prefix using it as type is warning; (2) currently analyzer resolves prefix as field (don't ask)
 built_in_identifier_prefix_test: CompileTimeError # Issue 12694
 
-# Issue 15315
-class_literal_test/01: CompileTimeError
-class_literal_test/03: CompileTimeError
-class_literal_test/07: CompileTimeError
-constructor_call_as_function_test/01: fail
-call_type_literal_test/01: fail
-
 # TBF: we should check conflicts not only for methods, but for accessors too
 override_field_test/03: fail
 method_override7_test/03: Fail # Issue 11496
@@ -120,7 +113,6 @@ type_error_test: fail # Issue 12289
 
 # test issue 12381, It is compile-time error to invoke not existing function
 issue11724_test: fail # Issue 12381
-call_nonexistent_static_test/08: fail # Issue 12381
 
 # test issue 12539, rules for finals were loosened, contradiction in spec was fixed
 const_syntax_test/09: fail # Issue 12539
@@ -251,7 +243,7 @@ generic_test: StaticWarning
 getter_declaration_negative_test: CompileTimeError
 getter_no_setter2_test/01: StaticWarning
 getter_no_setter_test/01: StaticWarning
-illegal_invocation_test/01: CompileTimeError
+illegal_invocation_test/01: StaticWarning
 implicit_this_test/02: StaticWarning
 implied_interface_test: StaticWarning
 import_combinators_test: StaticWarning
@@ -283,9 +275,9 @@ label6_negative_test: CompileTimeError
 label8_negative_test: CompileTimeError
 label_test: StaticWarning
 library_ambiguous_test/00: StaticWarning
-library_ambiguous_test/01: CompileTimeError
-library_ambiguous_test/02: CompileTimeError
-library_ambiguous_test/03: CompileTimeError
+library_ambiguous_test/01: StaticWarning
+library_ambiguous_test/02: StaticWarning
+library_ambiguous_test/03: StaticWarning
 library_negative_test: CompileTimeError
 list_literal2_negative_test: CompileTimeError
 list_literal4_test: StaticWarning
@@ -391,7 +383,7 @@ script1_negative_test: CompileTimeError
 script2_negative_test: CompileTimeError
 setter_declaration2_negative_test: CompileTimeError
 setter_declaration_negative_test: CompileTimeError
-setter_no_getter_call_test/01: CompileTimeError
+setter_no_getter_call_test/01: StaticWarning
 source_self_negative_test: CompileTimeError
 static_initializer_type_error_test: StaticWarning
 string_escape4_negative_test: CompileTimeError
@@ -440,7 +432,7 @@ type_variable_conflict2_test/10: MissingCompileTimeError
 unary_plus_negative_test: CompileTimeError
 unbound_getter_test: StaticWarning
 unhandled_exception_negative_test: CompileTimeError
-unresolved_top_level_method_negative_test: CompileTimeError
+unresolved_top_level_method_negative_test: StaticWarning
 vm/type_cast_vm_test: StaticWarning
 vm/type_vm_test: StaticWarning
 void_type_test: StaticWarning
@@ -461,6 +453,6 @@ deferred_constraints_type_annotation_old_syntax_test/*: Pass, Fail
 deferred_constraints_constants_old_syntax_test/*: Pass, Fail
 deferred_shadow_load_library_test: Fail
 deferred_closurize_load_library_test: Fail
-deferred_load_library_wrong_args_test/01: Fail
-deferred_load_library_wrong_args_test/none: Fail
-deferred_load_inval_code_test: Fail
+deferred_load_library_wrong_args_test/01: StaticWarning
+deferred_load_library_wrong_args_test/none: StaticWarning
+deferred_load_inval_code_test: StaticWarning