From c1862cbb89a6bf42dcd07d92fe4f4bfeebca5775 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sat, 7 Sep 2024 16:06:14 +0900
Subject: [PATCH] [Bug #20719] `Float` argument must be ASCII compatible

---
 object.c                | 1 +
 test/ruby/test_float.rb | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/object.c b/object.c
index e2e68e07a4..bbc607ea98 100644
--- a/object.c
+++ b/object.c
@@ -3530,6 +3530,7 @@ rb_str_to_dbl_raise(VALUE str, int badcheck, int raise, int *error)
     VALUE v = 0;
 
     StringValue(str);
+    rb_must_asciicompat(str);
     s = RSTRING_PTR(str);
     len = RSTRING_LEN(str);
     if (s) {
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 415d62467e..a0b9b44464 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -850,6 +850,12 @@ class TestFloat < Test::Unit::TestCase
     o = Object.new
     def o.to_f; inf = Float::INFINITY; inf/inf; end
     assert_predicate(Float(o), :nan?)
+
+    assert_raise(Encoding::CompatibilityError) {Float("0".encode("utf-16be"))}
+    assert_raise(Encoding::CompatibilityError) {Float("0".encode("utf-16le"))}
+    assert_raise(Encoding::CompatibilityError) {Float("0".encode("utf-32be"))}
+    assert_raise(Encoding::CompatibilityError) {Float("0".encode("utf-32le"))}
+    assert_raise(Encoding::CompatibilityError) {Float("0".encode("iso-2022-jp"))}
   end
 
   def test_invalid_str