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Pedestrians crash against stopped cars #7

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nsubiron opened this issue Oct 31, 2017 · 5 comments
Closed

Pedestrians crash against stopped cars #7

nsubiron opened this issue Oct 31, 2017 · 5 comments
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@juaxix
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bug ue4 Requires changing code or blueprints in the Unreal Engine project

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@nsubiron
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Consequence of #6
@nsubiron nsubiron added the bug label Oct 31, 2017
@nsubiron nsubiron mentioned this issue Nov 7, 2017
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@juaxix
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juaxix commented Feb 26, 2018 •
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changed in Commit: a2a6105
walkers will detect cars and stop, but in the end they will touch the car and die

@nsubiron nsubiron mentioned this issue Mar 2, 2018
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@nsubiron nsubiron added the ue4 Requires changing code or blueprints in the Unreal Engine project label Mar 14, 2018
@juaxix
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juaxix commented Mar 19, 2018 •
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Another problem related to this is the way the pedestrian detects vehicles in the world. The perception angle is too wide sometimes so they could be walking inside the road and detects a car, thus making the walker to stop and wait 10 seconds until the next decision makes the vehicle to wait for the walker. Maybe we should reduce the angle

@juaxix juaxix mentioned this issue Apr 30, 2018
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@germanros1987
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Related to this, pedestrians tend to stand by cars and then die dramatically.

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juaxix commented May 22, 2018 •
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@germanros1987 Yes, that's what I was explaining in the issue #381 ,a game design decision is involved at this moment

@bigsheep2018 bigsheep2018 mentioned this issue Dec 3, 2018
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@nsubiron
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nsubiron commented Apr 5, 2019

No longer relevant, pedestrians are now controlled from client-side.

@nsubiron nsubiron closed this as completed Apr 5, 2019
@ghost ghost removed the backlog label Apr 5, 2019
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wentasah added a commit to wentasah/carla that referenced this issue Aug 16, 2023
@wentasah
PythonAPI: Fix segfault in GetAvailableMaps
b998e1f 
When using CARLA with Python 3.10, I'm getting a segfault in
GetAvailableMaps. The problem disappears when PyList manipulation does
not happen with GIL unlocked, as done in this commit.

The initial part of crash backtrace (from GDB) is below:

    Program terminated with signal SIGSEGV, Segmentation fault.

    warning: Section `.reg-xstate/49253' in core file too small.
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    117	   return tstate->interp;
    [Current thread is 1 (Thread 0x7fe6fe48f740 (LWP 49253))]
    (gdb) bt
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    matejm42#1  get_list_state () at Objects/listobject.c:26
    carla-simulator#2  PyList_New (size=0) at Objects/listobject.c:159
    carla-simulator#3  0x00007fe6fdc0dab0 in boost::python::detail::list_base::list_base() () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    carla-simulator#4  0x00007fe6ef9ecfc4 in boost::python::list::list (this=0x7ffd8a8aae28) at include/boost/python/list.hpp:61
    carla-simulator#5  GetAvailableMaps (self=...) at source/libcarla/Client.cpp:26
    carla-simulator#6  0x00007fe6efb6a8fe in boost::python::detail::invoke<boost::python::to_python_value<boost::python::list const&>, boost::python::list (*)(carla::client::Client const&), boost::python::arg_from_python<carla::client::Client const&> > (rc=..., f=<optimized out>, ac0=...)
        at include/boost/python/detail/invoke.hpp:73
    carla-simulator#7  boost::python::detail::caller_arity<1u>::impl<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> >::operator() (args_=<optimized out>, this=<optimized out>)
        at include/boost/python/detail/caller.hpp:233
    carla-simulator#8  boost::python::objects::caller_py_function_impl<boost::python::detail::caller<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> > >::operator() (
        this=<optimized out>, args=<optimized out>, kw=<optimized out>) at include/boost/python/object/py_function.hpp:38
    carla-simulator#9  0x00007fe6fdc1b4dd in boost::python::objects::function::call(_object*, _object*) const () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    carla-simulator#10 0x00007fe6fdc1b6a8 in boost::detail::function::void_function_ref_invoker0<boost::python::objects::(anonymous namespace)::bind_return, void>::invoke(boost::detail::function::function_buffer&) ()
       from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    ...
wentasah added a commit to wentasah/carla that referenced this issue Sep 3, 2023
@wentasah
PythonAPI: Fix segfault in GetAvailableMaps
38cd925 
When using CARLA with Python 3.10, I'm getting a segfault in
GetAvailableMaps. The problem disappears when PyList manipulation does
not happen with GIL unlocked, as done in this commit.

The initial part of crash backtrace (from GDB) is below:

    Program terminated with signal SIGSEGV, Segmentation fault.

    warning: Section `.reg-xstate/49253' in core file too small.
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    117	   return tstate->interp;
    [Current thread is 1 (Thread 0x7fe6fe48f740 (LWP 49253))]
    (gdb) bt
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    matejm42#1  get_list_state () at Objects/listobject.c:26
    carla-simulator#2  PyList_New (size=0) at Objects/listobject.c:159
    carla-simulator#3  0x00007fe6fdc0dab0 in boost::python::detail::list_base::list_base() () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    carla-simulator#4  0x00007fe6ef9ecfc4 in boost::python::list::list (this=0x7ffd8a8aae28) at include/boost/python/list.hpp:61
    carla-simulator#5  GetAvailableMaps (self=...) at source/libcarla/Client.cpp:26
    carla-simulator#6  0x00007fe6efb6a8fe in boost::python::detail::invoke<boost::python::to_python_value<boost::python::list const&>, boost::python::list (*)(carla::client::Client const&), boost::python::arg_from_python<carla::client::Client const&> > (rc=..., f=<optimized out>, ac0=...)
        at include/boost/python/detail/invoke.hpp:73
    carla-simulator#7  boost::python::detail::caller_arity<1u>::impl<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> >::operator() (args_=<optimized out>, this=<optimized out>)
        at include/boost/python/detail/caller.hpp:233
    carla-simulator#8  boost::python::objects::caller_py_function_impl<boost::python::detail::caller<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> > >::operator() (
        this=<optimized out>, args=<optimized out>, kw=<optimized out>) at include/boost/python/object/py_function.hpp:38
    carla-simulator#9  0x00007fe6fdc1b4dd in boost::python::objects::function::call(_object*, _object*) const () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    carla-simulator#10 0x00007fe6fdc1b6a8 in boost::detail::function::void_function_ref_invoker0<boost::python::objects::(anonymous namespace)::bind_return, void>::invoke(boost::detail::function::function_buffer&) ()
       from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    ...
wentasah added a commit to wentasah/carla that referenced this issue Sep 25, 2023
@wentasah
PythonAPI: Fix segfault in get_random_location_from_navigation()
fdd186e 
When I run generate_traffic.py under Python 3.10, I get a segfault at
line:

    loc = world.get_random_location_from_navigation()

The backtrace from gdb looks like this:

    #0  0x00007f04552ad7e7 in new_threadstate () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/libpython3.10.so.1.0
    matejm42#1  0x00007f04552adaa1 in PyGILState_Ensure () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/libpython3.10.so.1.0
    carla-simulator#2  0x00007f040afd4f32 in std::_Function_handler<void (carla::client::WorldSnapshot), MakeCallback(boost::python::api::object)::{lambda(auto:1)matejm42#1}>::_M_invoke(std::_Any_data const&, carla::client::WorldSnapshot&&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#3  0x00007f040b1d4ab1 in carla::client::detail::CallbackList<carla::client::WorldSnapshot>::Call(carla::client::WorldSnapshot) const () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#4  0x00007f040b1d424a in std::_Function_handler<void (carla::Buffer), carla::client::detail::Episode::Listen()::{lambda(auto:1)matejm42#1}>::_M_invoke(std::_Any_data const&, carla::Buffer&&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#5  0x00007f040b23fc41 in boost::asio::detail::completion_handler<boost::asio::detail::binder0<carla::streaming::detail::tcp::Client::ReadData()::{lambda()matejm42#1}::operator()() const::{lambda(boost::system::error_code, unsigned long)matejm42#1}::operator()(boost::system::error_code, unsigned long) const::{lambda()matejm42#1}>, boost::asio::io_context::basic_executor_type<std::allocator<void>, 0ul> >::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#6  0x00007f040b24ae85 in boost::asio::detail::strand_service::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#7  0x00007f040b1a94f5 in boost::asio::detail::scheduler::do_run_one(boost::asio::detail::conditionally_enabled_mutex::scoped_lock&, boost::asio::detail::scheduler_thread_info&, boost::system::error_code const&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#8  0x00007f040b199351 in boost::asio::detail::scheduler::run(boost::system::error_code&) [clone .isra.0] () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#9  0x00007f040b1ac1cb in std::thread::_State_impl<std::thread::_Invoker<std::tuple<carla::ThreadPool::AsyncRun(unsigned long)::{lambda()matejm42#1}> > >::_M_run() ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    carla-simulator#10 0x00007f040bce05c3 in execute_native_thread_routine () from /nix/store/2fpmbk0g0ggm9zq89af7phvvvv8dnm7n-gcc-12.3.0-lib/lib/libstdc++.so.6
    carla-simulator#11 0x00007f045509fdd4 in start_thread () from /nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib/libc.so.6
    carla-simulator#12 0x00007f04551219b0 in clone3 () from /nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib/libc.so.6

It turns out that its caused by releasing GIL for too long. We fix it
by releasing the GIL only for the actual libcarla call and
constructing Python objects with GIL locked.
@Andrey949101 Andrey949101 mentioned this issue Oct 20, 2023
Open
bernatx added a commit that referenced this issue Oct 27, 2023
@wentasah @bernatx
PythonAPI: Fix segfaults due to incorrect GIL locking (#6718)
2de8ad0 
* PythonAPI: Fix segfault in GetAvailableMaps

When using CARLA with Python 3.10, I'm getting a segfault in
GetAvailableMaps. The problem disappears when PyList manipulation does
not happen with GIL unlocked, as done in this commit.

The initial part of crash backtrace (from GDB) is below:

    Program terminated with signal SIGSEGV, Segmentation fault.

    warning: Section `.reg-xstate/49253' in core file too small.
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    117	   return tstate->interp;
    [Current thread is 1 (Thread 0x7fe6fe48f740 (LWP 49253))]
    (gdb) bt
    #0  _PyInterpreterState_GET () at ./Include/internal/pycore_pystate.h:117
    #1  get_list_state () at Objects/listobject.c:26
    #2  PyList_New (size=0) at Objects/listobject.c:159
    #3  0x00007fe6fdc0dab0 in boost::python::detail::list_base::list_base() () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    #4  0x00007fe6ef9ecfc4 in boost::python::list::list (this=0x7ffd8a8aae28) at include/boost/python/list.hpp:61
    #5  GetAvailableMaps (self=...) at source/libcarla/Client.cpp:26
    #6  0x00007fe6efb6a8fe in boost::python::detail::invoke<boost::python::to_python_value<boost::python::list const&>, boost::python::list (*)(carla::client::Client const&), boost::python::arg_from_python<carla::client::Client const&> > (rc=..., f=<optimized out>, ac0=...)
        at include/boost/python/detail/invoke.hpp:73
    #7  boost::python::detail::caller_arity<1u>::impl<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> >::operator() (args_=<optimized out>, this=<optimized out>)
        at include/boost/python/detail/caller.hpp:233
    #8  boost::python::objects::caller_py_function_impl<boost::python::detail::caller<boost::python::list (*)(carla::client::Client const&), boost::python::default_call_policies, boost::mpl::vector2<boost::python::list, carla::client::Client const&> > >::operator() (
        this=<optimized out>, args=<optimized out>, kw=<optimized out>) at include/boost/python/object/py_function.hpp:38
    #9  0x00007fe6fdc1b4dd in boost::python::objects::function::call(_object*, _object*) const () from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    #10 0x00007fe6fdc1b6a8 in boost::detail::function::void_function_ref_invoker0<boost::python::objects::(anonymous namespace)::bind_return, void>::invoke(boost::detail::function::function_buffer&) ()
       from /nix/store/c95f3nrkz3sflvycihyw1c8q4nk47p4m-boost-1.79.0/lib/libboost_python310.so.1.79.0
    ...

* PythonAPI: Fix segfault in get_random_location_from_navigation()

When I run generate_traffic.py under Python 3.10, I get a segfault at
line:

    loc = world.get_random_location_from_navigation()

The backtrace from gdb looks like this:

    #0  0x00007f04552ad7e7 in new_threadstate () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/libpython3.10.so.1.0
    #1  0x00007f04552adaa1 in PyGILState_Ensure () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/libpython3.10.so.1.0
    #2  0x00007f040afd4f32 in std::_Function_handler<void (carla::client::WorldSnapshot), MakeCallback(boost::python::api::object)::{lambda(auto:1)#1}>::_M_invoke(std::_Any_data const&, carla::client::WorldSnapshot&&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #3  0x00007f040b1d4ab1 in carla::client::detail::CallbackList<carla::client::WorldSnapshot>::Call(carla::client::WorldSnapshot) const () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #4  0x00007f040b1d424a in std::_Function_handler<void (carla::Buffer), carla::client::detail::Episode::Listen()::{lambda(auto:1)#1}>::_M_invoke(std::_Any_data const&, carla::Buffer&&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #5  0x00007f040b23fc41 in boost::asio::detail::completion_handler<boost::asio::detail::binder0<carla::streaming::detail::tcp::Client::ReadData()::{lambda()#1}::operator()() const::{lambda(boost::system::error_code, unsigned long)#1}::operator()(boost::system::error_code, unsigned long) const::{lambda()#1}>, boost::asio::io_context::basic_executor_type<std::allocator<void>, 0ul> >::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #6  0x00007f040b24ae85 in boost::asio::detail::strand_service::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #7  0x00007f040b1a94f5 in boost::asio::detail::scheduler::do_run_one(boost::asio::detail::conditionally_enabled_mutex::scoped_lock&, boost::asio::detail::scheduler_thread_info&, boost::system::error_code const&) ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #8  0x00007f040b199351 in boost::asio::detail::scheduler::run(boost::system::error_code&) [clone .isra.0] () from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #9  0x00007f040b1ac1cb in std::thread::_State_impl<std::thread::_Invoker<std::tuple<carla::ThreadPool::AsyncRun(unsigned long)::{lambda()#1}> > >::_M_run() ()
       from /nix/store/zqj9irpw63pal9r4671p1gjd9jiw5sid-ros-env/lib/python3.10/site-packages/carla/libcarla.cpython-310-x86_64-linux-gnu.so
    #10 0x00007f040bce05c3 in execute_native_thread_routine () from /nix/store/2fpmbk0g0ggm9zq89af7phvvvv8dnm7n-gcc-12.3.0-lib/lib/libstdc++.so.6
    #11 0x00007f045509fdd4 in start_thread () from /nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib/libc.so.6
    #12 0x00007f04551219b0 in clone3 () from /nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib/libc.so.6

It turns out that its caused by releasing GIL for too long. We fix it
by releasing the GIL only for the actual libcarla call and
constructing Python objects with GIL locked.

---------

Co-authored-by: bernat <bernatx@gmail.com>
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