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string.c: check just before modification

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* string.c (rb_str_chomp_bang): check if modifiable after checking
  an argument and just before modification, as it can get frozen
  during the argument conversion to String.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59112 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-06-18 04:38:01 +00:00
parent 80aa1e6218
commit f5052d45be
2 changed files with 10 additions and 1 deletions
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8
test/ruby/test_string.rb
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@ -444,6 +444,14 @@ CODE
s = S("").freeze
assert_raise_with_message(RuntimeError, /frozen/) {s.chomp!}
s = S("ax")
o = Struct.new(:s).new(s)
def o.to_str
s.freeze
"x"
end
assert_raise_with_message(RuntimeError, /frozen/) {s.chomp!(o)}
ensure
$/ = save
end