Set Thread.report_on_exception=true by default to report exceptions in Threads

* [Feature #14143] [ruby-core:83979]
* vm.c (vm_init2): Set Thread.report_on_exception to true.
* thread.c (thread_start_func_2): Add indication the message is caused
  by report_on_exception = true.
* spec/ruby: Specify the new behavior.
* test/ruby/test_thread.rb: Adapt and improve tests for
  Thread.report_on_exception and Thread#report_on_exception.
* test/ruby/test_thread.rb, test/ruby/test_exception.rb: Unset
  report_on_exception for tests expecting no extra output.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61183 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index 02c689df05..30dfb96fb7 100644
--- a/thread.c
+++ b/thread.c
@@ -648,7 +648,7 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start, VALUE *register_stack_s
 	    else {
 		if (th->report_on_exception) {
 		    VALUE mesg = rb_thread_to_s(th->self);
-		    rb_str_cat_cstr(mesg, " terminated with exception:\n");
+		    rb_str_cat_cstr(mesg, " terminated with exception (report_on_exception is true):\n");
 		    rb_write_error_str(mesg);
 		    rb_ec_error_print(th->ec, errinfo);
 		}