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Private local variables should shadow outer variables [Bug #18629]

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This commit is contained in:
Nobuyoshi Nakada 2022-04-21 16:04:36 +09:00
parent ee48c9cda6
commit 3ddf6ad4d2
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2 changed files with 6 additions and 1 deletions
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3
parse.y
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@ -10994,9 +10994,9 @@ is_private_local_id(ID name)
static int
shadowing_lvar_0(struct parser_params *p, ID name)
{
if (is_private_local_id(name)) return 1;
if (dyna_in_block(p)) {
if (dvar_curr(p, name)) {
if (is_private_local_id(name)) return 1;
yyerror0("duplicated argument name");
}
else if (dvar_defined(p, name) || local_id(p, name)) {
@ -11009,6 +11009,7 @@ shadowing_lvar_0(struct parser_params *p, ID name)
}
else {
if (local_id(p, name)) {
if (is_private_local_id(name)) return 1;
yyerror0("duplicated argument name");
}
}

4
test/ruby/test_parse.rb
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@ -930,6 +930,10 @@ x = __ENCODING__
assert_no_warning(/shadowing outer local variable/) {eval("a=1; tap {|a|}")}
end
def test_shadowing_private_local_variable
assert_equal 1, eval("_ = 1; [[2]].each{ |(_)| }; _")
end
def test_unused_variable
o = Object.new
assert_warning(/assigned but unused variable/) {o.instance_eval("def foo; a=1; nil; end")}