YJIT: jit_prepare_routine_call() for String#+@ missing

We saw SEGVs due to this when running with StackProf, which needs a
correct PC for RUBY_INTERNAL_EVENT_NEWOBJ, the same event used for
ObjectSpace allocation tracing.

[Bug #19444]

1 files changed, 27 insertions, 0 deletions

diff --git a/test/ruby/test_yjit.rb b/test/ruby/test_yjit.rb
index 6627a78628..2428a401cf 100644
--- a/test/ruby/test_yjit.rb
+++ b/test/ruby/test_yjit.rb
@@ -1092,6 +1092,33 @@ class TestYJIT < Test::Unit::TestCase
     RUBY
   end
 
+  def test_tracing_str_uplus
+    assert_compiles(<<~RUBY, frozen_string_literal: true, result: :ok)
+      def str_uplus
+        _ = 1
+        _ = 2
+        ret = [+"frfr", __LINE__]
+        _ = 3
+        _ = 4
+
+        ret
+      end
+
+      str_uplus
+      require 'objspace'
+      ObjectSpace.trace_object_allocations_start
+
+      str, expected_line = str_uplus
+      alloc_line = ObjectSpace.allocation_sourceline(str)
+
+      if expected_line == alloc_line
+        :ok
+      else
+        [expected_line, alloc_line]
+      end
+    RUBY
+  end
+
   private
 
   def code_gc_helpers