"template" is an invalid package name when using rosidl

[vtalpaert]

There is an issue if a package/project is called "template"

Bug report

Required Info:

• Operating System:
  • Ubuntu 18.04
• Installation type:
  • binaries
• Version or commit hash:
  • Eloquent
• DDS implementation:
  • Fast-RTPS
• Client library (if applicable):
  • ament_cmake rosidl

Steps to reproduce issue

1. Create a package with ros2 pkg create template
2. Add in package.xml the lines

  <buildtool_depend>rosidl_default_generators</buildtool_depend>

  <build_depend>rosidl_default_generators</build_depend>
  <exec_depend>rosidl_default_runtime</exec_depend>
  <member_of_group>rosidl_interface_packages</member_of_group>

1. Add in CMakeLists.txt the lines

find_package(rosidl_default_generators REQUIRED)
rosidl_generate_interfaces(${PROJECT_NAME}
  "msg/MyMsg.msg"
)
ament_export_dependencies(rosidl_default_runtime)

1. Create a custom message such as msg/MyMsg.msg and inside the file int64 i

Expected behavior

Compilation without error, or a warning when creating the package itself

Starting >>> template_nobug
Finished <<< template_nobug [4.22s]                       

Summary: 1 package finished [4.31s]

Actual behavior

victor@XXX:~/workspace/ros2-bug-report$ colcon build
Starting >>> template
--- stderr: template                             
In file included from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:12:0:
/home/victor/workspace/ros2-bug-report/build/template/rosidl_generator_cpp/template/msg/my_msg__struct.hpp:23:11: error: expected identifier before ‘template’
 namespace template
           ^~~~~~~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_generator_cpp/template/msg/my_msg__struct.hpp:24:1: error: expected unqualified-id before ‘{’ token
 {
 ^
In file included from /opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:18:0,
                 from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:13:
/opt/ros/eloquent/include/rosidl_typesupport_introspection_c/field_types.h:21:1: error: expected ‘;’ before ‘extern’
 extern "C"
 ^~~~~~
In file included from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:13:0:
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:24:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT’ was not declared in this scope
 const uint8_t ROS_TYPE_FLOAT = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:24:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_FLOAT = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:25:33: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_DOUBLE’ was not declared in this scope
 const uint8_t ROS_TYPE_DOUBLE = rosidl_typesupport_introspection_c__ROS_TYPE_DOUBLE;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:25:33: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_DOUBLE = rosidl_typesupport_introspection_c__ROS_TYPE_DOUBLE;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:26:38: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_LONG_DOUBLE’ was not declared in this scope
 const uint8_t ROS_TYPE_LONG_DOUBLE = rosidl_typesupport_introspection_c__ROS_TYPE_LONG_DOUBLE;
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:27:31: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_CHAR’ was not declared in this scope
 const uint8_t ROS_TYPE_CHAR = rosidl_typesupport_introspection_c__ROS_TYPE_CHAR;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:27:31: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_CHAR = rosidl_typesupport_introspection_c__ROS_TYPE_CHAR;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:28:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_WCHAR’ was not declared in this scope
 const uint8_t ROS_TYPE_WCHAR = rosidl_typesupport_introspection_c__ROS_TYPE_WCHAR;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:28:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_WCHAR = rosidl_typesupport_introspection_c__ROS_TYPE_WCHAR;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:29:34: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_BOOLEAN’ was not declared in this scope
 const uint8_t ROS_TYPE_BOOLEAN = rosidl_typesupport_introspection_c__ROS_TYPE_BOOLEAN;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:29:34: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_BOOLEAN = rosidl_typesupport_introspection_c__ROS_TYPE_BOOLEAN;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                  template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:30:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_OCTET’ was not declared in this scope
 const uint8_t ROS_TYPE_OCTET = rosidl_typesupport_introspection_c__ROS_TYPE_OCTET;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:30:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_OCTET = rosidl_typesupport_introspection_c__ROS_TYPE_OCTET;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:31:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_UINT8’ was not declared in this scope
 const uint8_t ROS_TYPE_UINT8 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT8;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:31:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_UINT8 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT8;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:32:31: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_INT8’ was not declared in this scope
 const uint8_t ROS_TYPE_INT8 = rosidl_typesupport_introspection_c__ROS_TYPE_INT8;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:32:31: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_INT8 = rosidl_typesupport_introspection_c__ROS_TYPE_INT8;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:33:33: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_UINT16’ was not declared in this scope
 const uint8_t ROS_TYPE_UINT16 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT16;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:33:33: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_UINT16 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT16;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:34:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_INT16’ was not declared in this scope
 const uint8_t ROS_TYPE_INT16 = rosidl_typesupport_introspection_c__ROS_TYPE_INT16;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:34:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_INT16 = rosidl_typesupport_introspection_c__ROS_TYPE_INT16;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:35:33: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_UINT32’ was not declared in this scope
 const uint8_t ROS_TYPE_UINT32 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT32;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:35:33: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_UINT32 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT32;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:36:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_INT32’ was not declared in this scope
 const uint8_t ROS_TYPE_INT32 = rosidl_typesupport_introspection_c__ROS_TYPE_INT32;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:36:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_INT32 = rosidl_typesupport_introspection_c__ROS_TYPE_INT32;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:37:33: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_UINT64’ was not declared in this scope
 const uint8_t ROS_TYPE_UINT64 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT64;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:37:33: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_UINT64 = rosidl_typesupport_introspection_c__ROS_TYPE_UINT64;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:38:32: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_INT64’ was not declared in this scope
 const uint8_t ROS_TYPE_INT64 = rosidl_typesupport_introspection_c__ROS_TYPE_INT64;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:38:32: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_INT64 = rosidl_typesupport_introspection_c__ROS_TYPE_INT64;
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:39:33: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_STRING’ was not declared in this scope
 const uint8_t ROS_TYPE_STRING = rosidl_typesupport_introspection_c__ROS_TYPE_STRING;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:39:33: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_STRING = rosidl_typesupport_introspection_c__ROS_TYPE_STRING;
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                 template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:40:34: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_WSTRING’ was not declared in this scope
 const uint8_t ROS_TYPE_WSTRING = rosidl_typesupport_introspection_c__ROS_TYPE_WSTRING;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:40:34: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_WSTRING = rosidl_typesupport_introspection_c__ROS_TYPE_WSTRING;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                  template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:42:34: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_MESSAGE’ was not declared in this scope
 const uint8_t ROS_TYPE_MESSAGE = rosidl_typesupport_introspection_c__ROS_TYPE_MESSAGE;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:42:34: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_MESSAGE = rosidl_typesupport_introspection_c__ROS_TYPE_MESSAGE;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                  template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:45:31: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_BOOL’ was not declared in this scope
 const uint8_t ROS_TYPE_BOOL = rosidl_typesupport_introspection_c__ROS_TYPE_BOOL;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:45:31: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_BOOL = rosidl_typesupport_introspection_c__ROS_TYPE_BOOL;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:46:31: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_BYTE’ was not declared in this scope
 const uint8_t ROS_TYPE_BYTE = rosidl_typesupport_introspection_c__ROS_TYPE_BYTE;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:46:31: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_BYTE = rosidl_typesupport_introspection_c__ROS_TYPE_BYTE;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:47:34: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT32’ was not declared in this scope
 const uint8_t ROS_TYPE_FLOAT32 = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT32;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:47:34: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_FLOAT32 = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT32;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                  template__rosidl_typesupport_introspection_cpp_EXPORTS
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:48:34: error: ‘rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT64’ was not declared in this scope
 const uint8_t ROS_TYPE_FLOAT64 = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT64;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/ros/eloquent/include/rosidl_typesupport_introspection_cpp/field_types.hpp:48:34: note: suggested alternative: ‘template__rosidl_typesupport_introspection_cpp_EXPORTS’
 const uint8_t ROS_TYPE_FLOAT64 = rosidl_typesupport_introspection_c__ROS_TYPE_FLOAT64;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                  template__rosidl_typesupport_introspection_cpp_EXPORTS
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:19:11: error: expected identifier before ‘template’
 namespace template
           ^~~~~~~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:20:1: error: expected unqualified-id before ‘{’ token
 {
 ^
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:81:1: error: expected ‘;’ before ‘namespace’
 namespace rosidl_typesupport_introspection_cpp
 ^~~~~~~~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp: In function ‘const rosidl_message_type_support_t* rosidl_typesupport_introspection_cpp__get_message_type_support_handle__template__msg__MyMsg()’:
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:102:13: error: expected id-expression before ‘template’
   return &::template::msg::rosidl_typesupport_introspection_cpp::MyMsg_message_type_support_handle;
             ^~~~~~~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:102:13: error: expected ‘;’ before ‘template’
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp:102:13: error: expected primary-expression before ‘template’
make[2]: *** [CMakeFiles/template__rosidl_typesupport_introspection_cpp.dir/rosidl_typesupport_introspection_cpp/template/msg/my_msg__type_support.cpp.o] Error 1
make[1]: *** [CMakeFiles/template__rosidl_typesupport_introspection_cpp.dir/all] Error 2
make[1]: *** Attente des tâches non terminées....
In file included from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_fastrtps_cpp/template/msg/my_msg__rosidl_typesupport_fastrtps_cpp.hpp:11:0,
                 from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_fastrtps_cpp/template/msg/dds_fastrtps/my_msg__type_support.cpp:4:
/home/victor/workspace/ros2-bug-report/build/template/rosidl_generator_cpp/template/msg/my_msg__struct.hpp:23:11: error: expected identifier before ‘template’
 namespace template
           ^~~~~~~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_generator_cpp/template/msg/my_msg__struct.hpp:24:1: error: expected unqualified-id before ‘{’ token
 {
 ^
In file included from /home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_fastrtps_cpp/template/msg/dds_fastrtps/my_msg__type_support.cpp:4:0:
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_fastrtps_cpp/template/msg/my_msg__rosidl_typesupport_fastrtps_cpp.hpp:14:10: error: ‘#pragma’ is not allowed here
 # pragma GCC diagnostic push
          ^~~
/home/victor/workspace/ros2-bug-report/build/template/rosidl_typesupport_fastrtps_cpp/template/msg/my_msg__rosidl_typesupport_fastrtps_cpp.hpp:15:53: error: expected declaration before end of line
 # pragma GCC diagnostic ignored "-Wunused-parameter"
                                                     ^
make[2]: *** [CMakeFiles/template__rosidl_typesupport_fastrtps_cpp.dir/rosidl_typesupport_fastrtps_cpp/template/msg/dds_fastrtps/my_msg__type_support.cpp.o] Error 1
make[1]: *** [CMakeFiles/template__rosidl_typesupport_fastrtps_cpp.dir/all] Error 2
make: *** [all] Error 2
---
Failed   <<< template [1.87s, exited with code 2]

Summary: 0 packages finished [1.98s]
  1 package failed: template
  1 package had stderr output: template

Additional information

The problem is solved when the project is renamed to something else.

Thank you

[dirk-thomas]

Thanks for reporting this. The problem is very similar to #272. Therefore I updated its title to also mention the package name.

I will go ahead and close this ticket as a duplicate.