* error.c (compile_err_append, compile_warn_print, warn_print): use
  rb_write_error_str() instead of writing to rb_stderr directly.
* io.c (rb_write_error_str): a stopgap measure not to unblock GVL.
  warning from require seems to still have race condition errors.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38590 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* test/ruby/test_require.rb (test_require_invalid_shared_object),
  (test_require_too_long_filename, test_require_changed_current_dir),
  (test_require_not_modified_load_path, test_require_changed_home),
  (test_require_to_path_redefined_in_load_path),
  (test_require_to_str_redefined_in_load_path),
  (assert_require_with_shared_array_modified): clear preset load path
  so that unexpected files will not get loaded.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38486 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38435 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  need to check compatibility, not equality of encodings.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38356 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* array.c (rb_ary_shared_with_p): fix cache validity check.
  If #pop or #shift has been called against $: or $", the array will
  be still shared with the snapshot. We check array length for cache
  validity.
  [ruby-core:49518] [Bug #7383]

* test/ruby/test_require.rb
  (TestRequire#test_require_with_array_pop,
   TestRequire#test_require_with_array_shift): add tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37808 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  (TestRequire#test_require_to_path_redefined_in_load_path,
   TestRequire#test_require_to_str_redefined_in_load_path):
  Suppress method redefined warning when test-all with RUBYOPT=-w.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37484 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* file.c (rb_get_path_check_to_string): extract from
  rb_get_path_check(). We change the spec not to call to_path of
  String object.

* file.c (rb_get_path_check_convert): extract from rb_get_path_check().

* file.c (rb_get_path_check): follow the above change.

* file.c (rb_file_expand_path_fast): remove check_expand_path_args().
  Instead we call it in load.c.

* file.c (rb_find_file_ext_safe): use rb_get_expanded_load_path() to
  reduce expand cost.

* file.c (rb_find_file_safe): ditto.

* internal.h (rb_get_expanded_load_path): add a declaration.

* internal.h (rb_get_path_check_to_string, rb_get_path_check_convert):
  add declarations.

* load.c (rb_construct_expanded_load_path): fix for compatibility.
  Same checks in rb_get_path_check() are added. We don't replace
  $LOAD_PATH and ensure that String object of $LOAD_PATH are frozen.
  We don't freeze non String object and expand it every times. We add
  arguments for expanding load path partially and checking if load path
  have relative paths or non String objects.

* load.c (load_path_getcwd): get current working directory for checking
  if it's changed when getting load path.

* load.c (rb_get_expanded_load_path): fix for rebuilding cache properly.
  We check if current working directory is changed and rebuild expanded
  load path cache. We expand paths which start with ~ (User HOME) and
  non String objects every times for compatibility. We make this
  accessible from other source files.

* load.c (rb_feature_provided): call rb_get_path() since we changed
  rb_file_expand_path_fast() not to call it.

* load.c (Init_load): initialize vm->load_path_check_cache.

* vm.c (rb_vm_mark): mark vm->load_path_check_cache for GC.

* vm_core.h (rb_vm_struct): add vm->load_path_check_cache to store data
  to check load path cache validity.

* test/ruby/test_require.rb (TestRequire): add tests for require
  compatibility related to cached expanded load path.
  [ruby-core:47970] [Bug #7158]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37482 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* test/ruby/envutil.rb (Test::Unit::Assertions#file_assertion):
  rewrite file assertions.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e