Gardening: fix issues with expectations for precomp-linux-product-x64.

tests/language/language.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ $strong ]
 *: SkipByDesign # tests/language_strong has the strong mode versions of these tests.
 
 [$compiler == precompiler && $runtime == dart_precompiled ]
 stacktrace_demangle_ctors_test: RuntimeError
-vm/regress_27671_test: RuntimeError # Issue 30289
-export_double_same_main_test: Skip  # Crashes Issue 30289
-export_ambiguous_main_negative_test: Skip # Crashes Issue 30289
-vm/optimized_stacktrace_test: Skip # Crashes Issue 30289
-export_ambiguous_main_negative_test: Skip # Crashes Issue 30289
 
 [ ($runtime == vm || $runtime == flutter || $runtime == dart_precompiled) && $compiler != dartk && $compiler != dartkp ]
 abstract_beats_arguments2_test/01: Crash # Issue 29171
 
 # These test entries will be valid for vm (with and without kernel).
 [ $compiler == none || $compiler == app_jit || $compiler == dartk || $runtime == dart_precompiled ]
 
 # These tests are skipped in the VM because it has "--supermixin"
 # functionality enabled unconditionally.  The tests should be removed
 # once the same is true for analyzer (#24478) and dart2js (#23773)
@@ skipping 66 matching lines @@
 closure_cycles_test: Pass, Slow
 
 [ $runtime == vm || $runtime == dart_precompiled ]
 vm/load_to_load_unaligned_forwarding_vm_test: Pass, Crash # Unaligned offset. Issue 22151
 vm/unaligned_float_access_literal_index_test: Pass, Crash # Unaligned offset. Issue 22151
 vm/unaligned_float_access_literal_index_test: Pass, Crash # Unaligned offset. Issue 22151
 
 [ ($compiler == none || $compiler == precompiler || $compiler == app_jit) && (($runtime == vm || $runtime == dart_precompiled)) && $arch == ia32 ]
 vm/regress_24517_test: Pass, Fail # Issue 24517.
 
+[ $compiler == precompiler && $runtime == dart_precompiled ]
 vm/regress_27671_test: Skip # Unsupported
 export_double_same_main_test: Skip # Issue 29895
 export_ambiguous_main_negative_test: Skip # Issue 29895
 vm/optimized_stacktrace_test: Skip # Issue 30198
 
 [ $compiler == precompiler && $runtime == dart_precompiled && $mode == debug ]
 regress_29025_test: Crash  # Issue dartbug.com/29331
 
 [ $runtime == dart_precompiled ]
 # Imports dart:mirrors
@@ skipping 379 matching lines @@
 deferred_shadow_load_library_test: Skip # Timeout
 deferred_global_test: Skip # Timeout
 
 # Look like bugs.
 config_import_test: RuntimeError # Flutter Issue 9110
 vm/no_such_method_error_message_callable_vm_test: RuntimeError # Flutter Issue 9110
 vm/regress_27201_test: Fail # Flutter Issue 9110
 asyncstar_yield_test: Skip # Flutter Issue 9110
 await_for_test: Skip # Flutter Issue 9110
 await_for_cancel_test: Skip # Flutter Issue 9110