Ruby: improved logging of exceptions without backtraces.

If an exception was raised with a backtrace of zero length, the
nxt_ruby_exception_log() routine would return without logging the
exception class and message.  This commit fixes the issue.

1 files changed, 8 insertions, 4 deletions

diff --git a/src/ruby/nxt_ruby.c b/src/ruby/nxt_ruby.c
index ca14af5b..10935528 100644
--- a/src/ruby/nxt_ruby.c
+++ b/src/ruby/nxt_ruby.c
@@ -1069,14 +1069,18 @@ nxt_ruby_exception_log(nxt_unit_request_info_t *req, uint32_t level,
         return;
     }
 
+    eclass = rb_class_name(rb_class_of(err));
+
+    msg = rb_funcall(err, rb_intern("message"), 0);
     ary = rb_funcall(err, rb_intern("backtrace"), 0);
-    if (nxt_slow_path(RARRAY_LEN(ary) == 0)) {
+
+    if (RARRAY_LEN(ary) == 0) {
+        nxt_unit_req_log(req, level, "Ruby: %s (%s)", RSTRING_PTR(msg),
+                         RSTRING_PTR(eclass));
+
         return;
     }
 
-    eclass = rb_class_name(rb_class_of(err));
-    msg = rb_funcall(err, rb_intern("message"), 0);
-
     nxt_unit_req_log(req, level, "Ruby: %s: %s (%s)",
                      RSTRING_PTR(RARRAY_PTR(ary)[0]),
                      RSTRING_PTR(msg), RSTRING_PTR(eclass));