https://git.ruby-lang.org/ruby.git/commit/?id=131c31a920

From 131c31a9209c61f84d318aa18b61f468f48b8219 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 26 Oct 2022 19:43:14 +0900
Subject: [Bug #19081] Show the caller location in warning for Ractor

The internal location in ractor.rb is not usefull at all.
```
$ ruby -e 'Ractor.new {}'
<internal:ractor>:267: warning: Ractor is experimental, ...
```
---
 bootstraptest/test_ractor.rb | 6 ++++++
 ractor.c                     | 6 ------
 ractor.rb                    | 4 ++++
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index 6373349e42..0fad04ebbc 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -1618,4 +1618,10 @@ assert_equal "ok", %q{ https://github.com/ruby/ruby/blob/trunk/bootstraptest/test_ractor.rb#L1618
   "ok"
 }
 
+assert_match /\Atest_ractor\.rb:1:\s+warning:\s+Ractor is experimental/, %q{
+  Warning[:experimental] = $VERBOSE = true
+  STDERR.reopen(STDOUT)
+  eval("Ractor.new{}.take", nil, "test_ractor.rb", 1)
+}
+
 end # if !ENV['GITHUB_WORKFLOW']
diff --git a/ractor.c b/ractor.c
index 7fea312ab0..3569202e58 100644
--- a/ractor.c
+++ b/ractor.c
@@ -1438,12 +1438,6 @@ cancel_single_ractor_mode(void) https://github.com/ruby/ruby/blob/trunk/ractor.c#L1438
     }
 
     ruby_single_main_ractor = NULL;
-
-    if (rb_warning_category_enabled_p(RB_WARN_CATEGORY_EXPERIMENTAL)) {
-        rb_category_warn(RB_WARN_CATEGORY_EXPERIMENTAL,
-                         "Ractor is experimental, and the behavior may change in future versions of Ruby! "
-                         "Also there are many implementation issues.");
-    }
 }
 
 static void
diff --git a/ractor.rb b/ractor.rb
index 8e229d4700..1031fe499b 100644
--- a/ractor.rb
+++ b/ractor.rb
@@ -262,6 +262,10 @@ class Ractor https://github.com/ruby/ruby/blob/trunk/ractor.rb#L262
   def self.new(*args, name: nil, &block)
     b = block # TODO: builtin bug
     raise ArgumentError, "must be called with a block" unless block
+    if __builtin_cexpr!("RBOOL(ruby_single_main_ractor)")
+      warn("Ractor is experimental, and the behavior may change in future versions of Ruby! " \
+           "Also there are many implementation issues.", uplevel: 0, category: :experimental)
+    end
     loc = caller_locations(1, 1).first
     loc = "#{loc.path}:#{loc.lineno}"
     __builtin_ractor_create(loc, name, args, b)
-- 
cgit v1.2.3


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