Startup error writing to to /var/log/rabbitmq/rabbit#rab04.log - rabbitmq

Question

Rabbitmq with erlang-base-hipe installed on Ubuntu 14.04 starts fine, but logs several of these messages in the /var/log/rabbitmq/startup_log file
Error: function_clause
Stack trace: [{error_logger_file_h,write_event,
[{<0.4819.0>,"/var/log/rabbitmq/rabbit#rab04.log",[]},
{info_msg,<0.31.0>,
{<0.2.0>,"HiPE in use: compiled ~B modules in ~Bs.~n",
"9\e"}}],
[{file,"error_logger_file_h.erl"},{line,114}]},
{error_logger_file_h,handle_event,2,
[{file,"error_logger_file_h.erl"},{line,79}]},
{rabbit_error_logger_file_h,safe_handle_event,3,[]},
{gen_event,server_update,4,[{file,"gen_event.erl"},{line,538}]},
{gen_event,server_notify,4,[{file,"gen_event.erl"},{line,520}]},
{gen_event,server_notify,4,[{file,"gen_event.erl"},{line,522}]},
{gen_event,handle_msg,5,[{file,"gen_event.erl"},{line,261}]},
{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]
RabbitMQ works fine, however, we no longer get information written to the error log file.
The change is that we installed erlang-base-hipe and modified /etc/rabbitmq/rabbitmq.config with
{hipe_compile, true}
The permissions on /var/log/rabbitmq/rabbit#rab04.log are 644 and owned by the user and group rabbitmq which is the user configured for the rabbitmq service.
Suggestions on how to debug and or repair this problem are appreciated.