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Avoid rehashing in Hash#replace/dup/initialize_copy [Bug #16996]

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This commit is contained in:
Marc-Andre Lafortune 2021-03-15 22:15:03 -04:00
parent d094c3ef04
commit 0ef2923c2b
3 changed files with 7 additions and 12 deletions
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2
hash.c
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@ -2958,7 +2958,7 @@ rb_hash_replace(VALUE hash, VALUE hash2)
RHASH_TBL_RAW(hash)->type = RHASH_ST_TABLE(hash2)->type;
}
}
rb_hash_foreach(hash2, rb_hash_rehash_i, (VALUE)hash);
hash_copy(hash, hash2);
rb_gc_writebarrier_remember(hash);

10
test/ruby/test_hash.rb
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@ -113,13 +113,8 @@ class TestHash < Test::Unit::TestCase
assert_equal(2, h[1])
end
def test_dup_will_rehash
set1 = @cls[]
set2 = @cls[set1 => true]
set1[set1] = true
assert_equal set2, set2.dup
def test_dup_will_not_rehash
assert_hash_does_not_rehash(&:dup)
end
def assert_hash_does_not_rehash
@ -480,6 +475,7 @@ class TestHash < Test::Unit::TestCase
h1 = @cls[h => 1]
assert_equal(h1, h1.dup)
h[1] = 2
h1.rehash
assert_equal(h1, h1.dup)
end

7
test/test_set.rb
View file

@ -637,11 +637,10 @@ class TC_Set < Test::Unit::TestCase
assert_not_equal(Set[1], [1])
set1 = Class.new(Set)["a", "b"]
set2 = Set["a", "b", set1]
set1 = set1.add(set1.clone)
set1.add(set1).reset # Make recursive
set2 = Set["a", "b", Set["a", "b", set1]]
assert_equal(set2, set2.clone)
assert_equal(set1.clone, set1)
assert_equal(set1, set2)
assert_not_equal(Set[Exception.new,nil], Set[Exception.new,Exception.new], "[ruby-dev:26127]")
end