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-rw-r--r--test/ruby/test_syntax.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index b55e579062..ef1e24221e 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -1455,6 +1455,7 @@ eom
assert_syntax_error('->x=_1{}', /ordinary parameter is defined/)
assert_syntax_error('-> {_1; -> {_2}}', /numbered parameter is already used/)
assert_syntax_error('-> {-> {_1}; _2}', /numbered parameter is already used/)
+ assert_syntax_error('proc {_1; _1 = nil}', /Can't assign to numbered parameter _1/)
assert_warn(/`_1' is used as numbered parameter/) {eval('proc {_1 = nil}')}
assert_warn(/`_2' is used as numbered parameter/) {eval('_2=1')}
assert_raise_with_message(NameError, /undefined local variable or method `_1'/) {