add a test reproducing backtrace issue #3177

jruby · Aug 8, 2015 · f567247 · f567247
1 parent 257e730
commit f567247
Showing 2 changed files with 50 additions and 0 deletions.
diff --git a/test/org/jruby/javasupport/test/ThrowingRunnable.java b/test/org/jruby/javasupport/test/ThrowingRunnable.java
@@ -0,0 +1,21 @@
+package org.jruby.javasupport.test;
+
+/**
+ * https://github.com/jruby/jruby/issues/3177
+ * 
+ * @see test_backtraces.rb
+ */
+public class ThrowingRunnable {
+
+    final Runnable runnable;
+
+    public ThrowingRunnable(Runnable run) {
+        runnable = run;
+    }
+
+    public void doRun(boolean fail) throws Exception {
+        if (fail) throw new Exception();
+        runnable.run();
+    }
+
+}
diff --git a/test/test_backtraces.rb b/test/test_backtraces.rb
@@ -258,6 +258,35 @@ def test_exception_from_thread_with_abort_on_exception_true
     $stderr = STDERR
   end
 
+  def test_throwing_runnable_backtrace # GH-3177
+    fixnum_times_ = 'org.jruby.RubyFixnum.times(org/jruby/RubyFixnum.java:'
+    backtrace = nil
+
+    i = 0
+    throwing = org.jruby.javasupport.test.ThrowingRunnable.new do
+      1.times {
+        begin
+          throwing.doRun( (i += 1) > 0 )
+        rescue java.lang.Exception
+          assert e = $!.backtrace.find { |e| e.index('org.jruby.RubyFixnum.times') }
+          assert_equal fixnum_times_, e[ 0...fixnum_times_.size ]
+          backtrace = $!.backtrace.dup
+          raise
+        end
+      }
+    end
+
+    begin
+      throwing.doRun(false)
+    rescue java.lang.Exception
+      # puts $!.backtrace
+      # second rewriting of the same exception :
+      assert e = $!.backtrace.find { |e| e.index('org.jruby.RubyFixnum.times') }
+      assert_equal fixnum_times_, e[ 0...fixnum_times_.size ]
+      assert_equal backtrace, $!.backtrace # expect the same back-trace
+    end
+  end
+
   private
 
   # Convenience method to obtain the exception,