https://git.ruby-lang.org/ruby.git/commit/?id=0cc989696e

From 0cc989696e9a7d0386773d23aa64de8fc04ea9fe Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 1 Jul 2021 06:38:33 +0900
Subject: Add invalid hexadecimal float tests

---
 test/ruby/test_float.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 57a46fce92..fdc5d28ed7 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -141,6 +141,9 @@ class TestFloat < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_float.rb#L141
     assert_raise(ArgumentError){Float("1__1")}
     assert_raise(ArgumentError){Float("1.")}
     assert_raise(ArgumentError){Float("1.e+00")}
+    assert_raise(ArgumentError){Float("0x.1")}
+    assert_raise(ArgumentError){Float("0x1.")}
+    assert_raise(ArgumentError){Float("0x1.0")}
     assert_raise(ArgumentError){Float("0x1.p+0")}
     # add expected behaviour here.
     assert_equal(10, Float("1_0"))
-- 
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