pi@rpi3-opencl-20180518:~/deepspeech $ sudo gdb --args ./deepspeech ~/tmp/deepspeech/models/output_graph-n_hidden_1.pb ~/tmp/deepspeech/models/alphabet.txt ~/tmp/deepspeech/audio/2830-3980-0043.wav -t 2>&1 GNU gdb (Raspbian 7.12-6) 7.12.0.20161007-git Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "arm-linux-gnueabihf". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./deepspeech...done. (gdb) break Buffer.cpp:597 No source file named Buffer.cpp. Make breakpoint pending on future shared library load? (y or [n]) y Breakpoint 1 (Buffer.cpp:597) pending. (gdb) run Starting program: /home/pi/deepspeech/deepspeech /home/pi/tmp/deepspeech/models/output_graph-n_hidden_1.pb /home/pi/tmp/deepspeech/models/alphabet.txt /home/pi/tmp/deepspeech/audio/2830-3980-0043.wav -t [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". TensorFlow: v1.8.0-rc1-1904-g9989353054 DeepSpeech: v0.2.0-alpha.5-0-g7cc8382 Warning: reading entire model file into memory. Transform model file into an mmapped graph to reduce heap usage. [New Thread 0x6fc3f3e0 (LWP 7594)] [New Thread 0x6f43f3e0 (LWP 7595)] [New Thread 0x6ec3f3e0 (LWP 7596)] [New Thread 0x6e43f3e0 (LWP 7597)] [VC4CL] get extension function address: clIcdGetPlatformIDsKHR [VC4CL] get extension function address: clGetPlatformInfo [New Thread 0x6ce1c3e0 (LWP 7610)] [New Thread 0x6c4ff3e0 (LWP 7611)] [New Thread 0x6bcff3e0 (LWP 7612)] [New Thread 0x6b4ff3e0 (LWP 7613)] [VC4CL] base=0x3fc00000, mem=0x76ff1000 [VC4CL] V3D base: 0x76ff1000 _cl_context* VC4CL_clCreateContext(const cl_context_properties*, cl_uint, _cl_device_id* const*, void (*)(const char*, const void*, size_t, void*), void*, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Context.cpp:214 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Context; Args = {vc4cl::Device*, bool, int, vc4cl::Platform*, vc4cl::ContextProperty, void (*)(const char*, const void*, unsigned int, void*), void*}]:206 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Context; Args = {vc4cl::Device*, bool, int, vc4cl::Platform*, vc4cl::ContextProperty, void (*)(const char*, const void*, unsigned int, void*), void*}]:208 [VC4CL] Tracking live-time of object: cl_context T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Context; Args = {vc4cl::Device*, bool, int, vc4cl::Platform*, vc4cl::ContextProperty, void (*)(const char*, const void*, unsigned int, void*), void*}]:210 _cl_context* VC4CL_clCreateContext(const cl_context_properties*, cl_uint, _cl_device_id* const*, void (*)(const char*, const void*, size_t, void*), void*, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Context.cpp:219 _cl_command_queue* VC4CL_clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/CommandQueue.cpp:173 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::CommandQueue; Args = {vc4cl::Context*, bool, bool}]:206 [VC4CL] Starting queue handler thread... [New Thread 0x6acff3e0 (LWP 7614)] T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::CommandQueue; Args = {vc4cl::Context*, bool, bool}]:208 [VC4CL] Tracking live-time of object: cl_command_queue T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::CommandQueue; Args = {vc4cl::Context*, bool, bool}]:210 _cl_command_queue* VC4CL_clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/CommandQueue.cpp:177 [New Thread 0x6a4ff3e0 (LWP 7615)] [New Thread 0x69cff3e0 (LWP 7616)] [New Thread 0x694ff3e0 (LWP 7617)] [New Thread 0x68cff3e0 (LWP 7618)] [New Thread 0x684ff3e0 (LWP 7619)] [VC4CL] Mailbox file descriptor opened: 4 [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x00030012 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x00000004 [VC4CL] 0014: 0x00000001 [VC4CL] 0018: 0x00000004 [VC4CL] 001c: 0x00261dd8 [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x00030012 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x80000004 [VC4CL] 0014: 0x00000000 [VC4CL] 0018: 0x00000004 [VC4CL] 001c: 0x00261dd8 [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x00000000 [VC4CL] 0014: 0x00000081 [VC4CL] 0018: 0x7fffffff [VC4CL] 001c: 0x00261dd8 [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x80000008 [VC4CL] 0014: 0x3b400000 [VC4CL] 0018: 0x04c00000 [VC4CL] 001c: 0x00261dd8 [VC4CL] Mailbox request: succeeded [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x00000000 [VC4CL] 0014: 0x6dbe5ccb [VC4CL] 0018: 0x04c00000 [VC4CL] 001c: 0x7effeddc [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x80000008 [VC4CL] 0014: 0x3b400000 [VC4CL] 0018: 0x04c00000 [VC4CL] 001c: 0x7effeddc [VC4CL] Mailbox request: succeeded 2018-05-24 15:56:47.657190: I ./tensorflow/core/common_runtime/sycl/sycl_device.h:70] Found following OpenCL devices: 2018-05-24 15:56:47.657427: I ./tensorflow/core/common_runtime/sycl/sycl_device.h:72] id: 0, type: GPU, name: VideoCore IV GPU, vendor: Broadcom, profile: EMBEDDED_PROFILE [New Thread 0x67cff3e0 (LWP 7620)] [New Thread 0x674ff3e0 (LWP 7621)] [New Thread 0x66cff3e0 (LWP 7622)] [New Thread 0x664ff3e0 (LWP 7623)] [New Thread 0x65cff3e0 (LWP 7624)] [Thread 0x65cff3e0 (LWP 7624) exited] [New Thread 0x65cff3e0 (LWP 7625)] [Thread 0x65cff3e0 (LWP 7625) exited] [New Thread 0x65cff3e0 (LWP 7626)] [Thread 0x65cff3e0 (LWP 7626) exited] [New Thread 0x65cff3e0 (LWP 7627)] [Thread 0x65cff3e0 (LWP 7627) exited] [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x00000000 [VC4CL] 0014: 0x6dbe5ccb [VC4CL] 0018: 0x00000001 [VC4CL] 001c: 0x00000000 [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x00010006 [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x80000008 [VC4CL] 0014: 0x3b400000 [VC4CL] 0018: 0x04c00000 [VC4CL] 001c: 0x00000000 [VC4CL] Mailbox request: succeeded _cl_mem* VC4CL_clCreateBuffer(cl_context, cl_mem_flags, size_t, void*, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:861 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Buffer; Args = {vc4cl::Context*, long long unsigned int}]:206 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Buffer; Args = {vc4cl::Context*, long long unsigned int}]:208 [VC4CL] Tracking live-time of object: cl_mem T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Buffer; Args = {vc4cl::Context*, long long unsigned int}]:210 _cl_mem* VC4CL_clCreateBuffer(cl_context, cl_mem_flags, size_t, void*, cl_int*) => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:865 [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000024 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x0003000c [VC4CL] 000c: 0x0000000c [VC4CL] 0010: 0x0000000c [VC4CL] 0014: 0x00000030 [VC4CL] 0018: 0x00001000 [VC4CL] 001c: 0x0000000c [VC4CL] 0020: 0x00261dd8 [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000024 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x0003000c [VC4CL] 000c: 0x0000000c [VC4CL] 0010: 0x80000004 [VC4CL] 0014: 0x00000021 [VC4CL] 0018: 0x00001000 [VC4CL] 001c: 0x0000000c [VC4CL] 0020: 0x00261dd8 [VC4CL] Mailbox buffer before: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x00000000 [VC4CL] 0008: 0x0003000d [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x00000004 [VC4CL] 0014: 0x00000021 [VC4CL] 0018: 0x00261dd8 [VC4CL] 001c: 0x00000021 [VC4CL] Mailbox buffer after: [VC4CL] 0000: 0x00000020 [VC4CL] 0004: 0x80000000 [VC4CL] 0008: 0x0003000d [VC4CL] 000c: 0x00000008 [VC4CL] 0010: 0x80000004 [VC4CL] 0014: 0xbead7000 [VC4CL] 0018: 0x00261dd8 [VC4CL] 001c: 0x00000021 [VC4CL] base=0x3ead7000, mem=0x76ff0000 [VC4CL] Allocated 48 bytes of buffer: handle 33, device address 3199037440, host address 0x76ff0000 [Switching to Thread 0x6a4ff3e0 (LWP 7615)] Thread 11 "deepspeech" hit Breakpoint 1, vc4cl::Buffer::createBufferActionEvent (this=0x653004c0, commandQueue=0x28ff70, command_type=vc4cl::CommandType::BUFFER_WRITE, num_events_in_wait_list=0, event_wait_list=0x0, errcode_ret=0x6a4fe820) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:597 597 /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp: No such file or directory. (gdb) bt #0 vc4cl::Buffer::createBufferActionEvent (this=0x653004c0, commandQueue=0x28ff70, command_type=vc4cl::CommandType::BUFFER_WRITE, num_events_in_wait_list=0, event_wait_list=0x0, errcode_ret=0x6a4fe820) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:597 #1 0x6dbb6c80 in vc4cl::Buffer::enqueueWrite (this=0x653004c0, commandQueue=0x28ff70, blockingWrite=false, offset=0, size=48, ptr=0x3e0160, numEventsInWaitList=0, waitList=0x0, event=0x6a4fe9f8) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:175 #2 0x6dbbbe04 in VC4CL_clEnqueueWriteBuffer (command_queue=0x28ff90, buffer=0x653004e0, blocking_write=0, offset=0, size=48, ptr=0x3e0160, num_events_in_wait_list=0, event_wait_list=0x0, event=0x6a4fe9f8) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:1123 #3 0x7056c7b6 in cl::sycl::detail::queue::enqueue_write_to_buffer(void const*, _cl_mem*, unsigned int, unsigned int, std::vector<_cl_event*, std::allocator<_cl_event*> > const&) () from /home/pi/deepspeech/libComputeCpp.so #4 0x7055d1d4 in cl::sycl::detail::buffer_view::copy_to_device(std::shared_ptr const&, void const*, _cl_mem*, cl::sycl::detail::event_list const*, std::shared_ptr const&) () from /home/pi/deepspeech/libComputeCpp.so #5 0x70562832 in std::_Function_handler const&, cl::sycl::detail::event_list*), cl::sycl::handler::update_device_data(cl::sycl::accessor_base const&, std::shared_ptr, cl::sycl::access::mode, bool)::{lambda(std::shared_ptr const&, cl::sycl::detail::event_list*)#4}>::_M_invoke(std::_Any_data const&, std::shared_ptr const&, cl::sycl::detail::event_list*) () from /home/pi/deepspeech/libComputeCpp.so #6 0x7058191a in cl::sycl::detail::enqueue_task::execute(std::shared_ptr const&, cl::sycl::detail::event_list*) () from /home/pi/deepspeech/libComputeCpp.so #7 0x70580bba in cl::sycl::detail::command::run_kernel(std::shared_ptr const&, cl::sycl::detail::event_list*, cl::sycl::detail::UseHostFunctor) () from /home/pi/deepspeech/libComputeCpp.so #8 0x70554d3e in cl::sycl::detail::transaction::commit(std::shared_ptr const&) () from /home/pi/deepspeech/libComputeCpp.so #9 0x70556fb4 in cl::sycl::detail::transaction::state<(cl::sycl::detail::trans_detail::status_t)3>::enter() () from /home/pi/deepspeech/libComputeCpp.so #10 0x70554730 in cl::sycl::detail::transaction::change_to(cl::sycl::detail::trans_detail::status_t, cl::sycl::detail::trans_detail::status_t) () from /home/pi/deepspeech/libComputeCpp.so #11 0x705548f8 in cl::sycl::detail::transaction::next_state() () from /home/pi/deepspeech/libComputeCpp.so #12 0x7057c11e in cl::sycl::detail::scheduler::execute(std::unique_ptr >&&) () from /home/pi/deepspeech/libComputeCpp.so #13 0x7057c400 in cl::sycl::detail::scheduler::scheduler_loop() () from /home/pi/deepspeech/libComputeCpp.so #14 0x6fec3d44 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #15 0x6fd44fc4 in start_thread (arg=0x6a4ff3e0) at pthread_create.c:335 Backtrace stopped: Cannot access memory at address 0x66 (gdb) n vc4cl::Event* vc4cl::Buffer::createBufferActionEvent(vc4cl::CommandQueue*, vc4cl::CommandType, cl_uint, _cl_event* const*, cl_int*) const => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:597 599 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) n T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Event; Args = {vc4cl::Context*, int, vc4cl::CommandType}]:206 T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Event; Args = {vc4cl::Context*, int, vc4cl::CommandType}]:208 [VC4CL] Tracking live-time of object: cl_event T* vc4cl::newOpenCLObject(Args ...) [with T = vc4cl::Event; Args = {vc4cl::Context*, int, vc4cl::CommandType}]:210 600 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) n 602 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) vc4cl::Event* vc4cl::Buffer::createBufferActionEvent(vc4cl::CommandQueue*, vc4cl::CommandType, cl_uint, _cl_event* const*, cl_int*) const => /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:602 604 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 605 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) vc4cl::Buffer::enqueueWrite (this=0x653004c0, commandQueue=0x28ff70, blockingWrite=false, offset=0, size=48, ptr=0x3e0160, numEventsInWaitList=0, waitList=0x0, event=0x6a4fe9f8) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:176 176 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) print e $1 = (vc4cl::Event *) 0x653005a0 (gdb) n 181 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 182 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 183 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 184 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 186 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 187 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 189 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 192 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 193 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) VC4CL_clEnqueueWriteBuffer (command_queue=0x28ff90, buffer=0x653004e0, blocking_write=0, offset=0, size=48, ptr=0x3e0160, num_events_in_wait_list=0, event_wait_list=0x0, event=0x6a4fe9f8) at /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp:1124 1124 in /home/alex/codaz/Mozilla/DeepSpeech/RPI3-GPU/VC4CL/src/Buffer.cpp (gdb) 0x7056c7b6 in cl::sycl::detail::queue::enqueue_write_to_buffer(void const*, _cl_mem*, unsigned int, unsigned int, std::vector<_cl_event*, std::allocator<_cl_event*> > const&) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail5queue23enqueue_write_to_bufferEPKvP7_cl_memjjRKSt6vectorIP9_cl_eventSaIS9_EE, which has no line number information. 0x7055d1d4 in cl::sycl::detail::buffer_view::copy_to_device(std::shared_ptr const&, void const*, _cl_mem*, cl::sycl::detail::event_list const*, std::shared_ptr const&) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail11buffer_view14copy_to_deviceERKSt10shared_ptrINS1_7contextEEPKvP7_cl_memPKNS1_10event_listERKS3_INS1_5queueEE, which has no line number information. 0x70562832 in std::_Function_handler const&, cl::sycl::detail::event_list*), cl::sycl::handler::update_device_data(cl::sycl::accessor_base const&, std::shared_ptr, cl::sycl::access::mode, bool)::{lambda(std::shared_ptr const&, cl::sycl::detail::event_list*)#4}>::_M_invoke(std::_Any_data const&, std::shared_ptr const&, cl::sycl::detail::event_list*) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZNSt17_Function_handlerIFN2cl4sycl6detail5eventERKSt10shared_ptrINS2_5queueEEPNS2_10event_listEEZNS1_7handler18update_device_dataERKNS1_13accessor_baseES4_IvENS1_6access4modeEbEUlS8_SA_E2_E9_M_invokeERKSt9_Any_dataS8_SA_, which has no line number information. 0x7058191a in cl::sycl::detail::enqueue_task::execute(std::shared_ptr const&, cl::sycl::detail::event_list*) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail12enqueue_task7executeERKSt10shared_ptrINS1_5queueEEPNS1_10event_listE, which has no line number information. 0x70580bba in cl::sycl::detail::command::run_kernel(std::shared_ptr const&, cl::sycl::detail::event_list*, cl::sycl::detail::UseHostFunctor) () from /home/pi/deepspeech/libComputeCpp.so (gdb) n Single stepping until exit from function _ZN2cl4sycl6detail7command10run_kernelERKSt10shared_ptrINS1_5queueEEPNS1_10event_listENS1_14UseHostFunctorE, which has no line number information. 0x70554d3e in cl::sycl::detail::transaction::commit(std::shared_ptr const&) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail11transaction6commitERKSt10shared_ptrINS1_5queueEE, which has no line number information. 0x70556fb4 in cl::sycl::detail::transaction::state<(cl::sycl::detail::trans_detail::status_t)3>::enter() () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail11transaction5stateILNS1_12trans_detail8status_tE3EE5enterEv, which has no line number information. 0x70554730 in cl::sycl::detail::transaction::change_to(cl::sycl::detail::trans_detail::status_t, cl::sycl::detail::trans_detail::status_t) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail11transaction9change_toENS1_12trans_detail8status_tES4_, which has no line number information. 0x705548f8 in cl::sycl::detail::transaction::next_state() () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail11transaction10next_stateEv, which has no line number information. 0x7057c11e in cl::sycl::detail::scheduler::execute(std::unique_ptr >&&) () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail9scheduler7executeEOSt10unique_ptrINS1_11transactionESt14default_deleteIS4_EE, which has no line number information. 0x7057c400 in cl::sycl::detail::scheduler::scheduler_loop() () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function _ZN2cl4sycl6detail9scheduler14scheduler_loopEv, which has no line number information. 0x700ed0c8 in pthread_mutex_unlock@plt () from /home/pi/deepspeech/libComputeCpp.so (gdb) Single stepping until exit from function pthread_mutex_unlock@plt, which has no line number information. pthread_mutex_unlock (mutex=0x705d3760 ) at forward.c:194 194 forward.c: No such file or directory. (gdb) __GI___pthread_mutex_unlock (mutex=0x705d3760 ) at pthread_mutex_unlock.c:324 324 pthread_mutex_unlock.c: No such file or directory. (gdb) __pthread_mutex_unlock_usercnt (mutex=0x705d3760 , decr=1) at pthread_mutex_unlock.c:38 38 in pthread_mutex_unlock.c (gdb) 39 in pthread_mutex_unlock.c (gdb) 40 in pthread_mutex_unlock.c (gdb) 39 in pthread_mutex_unlock.c (gdb) 40 in pthread_mutex_unlock.c (gdb) 44 in pthread_mutex_unlock.c (gdb) 50 in pthread_mutex_unlock.c (gdb) 49 in pthread_mutex_unlock.c (gdb) 52 in pthread_mutex_unlock.c (gdb) 55 in pthread_mutex_unlock.c (gdb)