* error.c: add Exception#backtrace_locations.

  Now, there are no setter and independent from Exception#backtrace.
  [Feature #8960]
* eval.c (setup_exception): set backtrace locations for `bt_location'
  special attribute.
* vm_backtrace.c (rb_backtrace_to_location_ary): added.
* internal.h: ditto.
* test/ruby/test_backtrace.rb: add a test for
  Exception#backtrace_locations.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44170 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 30 insertions, 0 deletions

diff --git a/test/ruby/test_backtrace.rb b/test/ruby/test_backtrace.rb
index 91dec4a943..aded544dcf 100644
--- a/test/ruby/test_backtrace.rb
+++ b/test/ruby/test_backtrace.rb
@@ -14,6 +14,36 @@ class TestBacktrace < Test::Unit::TestCase
     assert_match(/.+:\d+:.+/, bt[0])
   end
 
+  def helper_test_exception_backtrace_locations
+    raise
+  end
+
+  def test_exception_backtrace_locations
+    bt = Fiber.new{
+      begin
+        raise
+      rescue => e
+        e.backtrace_locations
+      end
+    }.resume
+    assert_equal(1, bt.size)
+    assert_match(/.+:\d+:.+/, bt[0].to_s)
+
+    bt = Fiber.new{
+      begin
+        begin
+          helper_test_exception_backtrace_locations
+        rescue
+          raise
+        end
+      rescue => e
+        e.backtrace_locations
+      end
+    }.resume
+    assert_equal(2, bt.size)
+    assert_match(/helper_test_exception_backtrace_locations/, bt[0].to_s)
+  end
+
   def test_caller_lev
     cs = []
     Fiber.new{