4.2.1章节构建消息功能包错误string index out of range

[43996173]

 sensor_msgs/Image image 
---
int16 number          # 人脸个数
float32 use_time      # 识别耗时
int32[] top           # 人脸在图像中的位置
int32[] right
int32[] bottom
int32[] left

cmakelists.txt

cmake_minimum_required(VERSION 3.8)
project(chapt4_interfaces)

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

# find dependencies
find_package(ament_cmake REQUIRED)
find_package(rosidl_default_generators REQUIRED)
find_package(sensor_msgs REQUIRED)

rosidl_generate_interfaces(${PROJECT_NAME}
  "srv/FaceDetector.srv"
  DEPENDENCIES sensor_msgs
)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  # the following line skips the linter which checks for copyrights
  # comment the line when a copyright and license is added to all source files
  set(ament_cmake_copyright_FOUND TRUE)
  # the following line skips cpplint (only works in a git repo)
  # comment the line when this package is in a git repo and when
  # a copyright and license is added to all source files
  set(ament_cmake_cpplint_FOUND TRUE)
  ament_lint_auto_find_test_dependencies()
endif()

ament_package()

构建错误

CMake Error at /opt/ros/humble/share/rosidl_adapter/cmake/rosidl_adapt_interfaces.cmake:59 (message):
  execute_process(/usr/bin/python3 -m rosidl_adapter --package-name
  chapt4_interfaces --arguments-file
  /home/tingbo/chapt4/chapt4_ws/src/build/chapt4_interfaces/rosidl_adapter__arguments__chapt4_interfaces.json
  --output-dir
  /home/tingbo/chapt4/chapt4_ws/src/build/chapt4_interfaces/rosidl_adapter/chapt4_interfaces
  --output-file
  /home/tingbo/chapt4/chapt4_ws/src/build/chapt4_interfaces/rosidl_adapter/chapt4_interfaces.idls)
  returned error code 1:

  Error processing ' sensor_msgs/Image image' of
  'chapt4_interfaces/FaceDetector_Request': 'string index out of range'

  Traceback (most recent call last):

    File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
      return _run_code(code, main_globals, None,
    File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
      exec(code, run_globals)
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/__main__.py", line 19, in <module>
      sys.exit(main())
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/main.py", line 53, in main
      abs_idl_file = convert_to_idl(
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/__init__.py", line 24, in convert_to_idl
      return convert_srv_to_idl(
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/srv/__init__.py", line 28, in convert_srv_to_idl
      srv = parse_service_string(package_name, input_file.stem, content)
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 859, in parse_service_string
      request_message = parse_message_string(
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 520, in parse_message_string
      Type(type_string, context_package_name=pkg_name),
    File "/opt/ros/humble/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 241, in __init__
      self.is_array = type_string[-1] == ']'

  IndexError: string index out of range

Call Stack (most recent call first):
  /opt/ros/humble/share/rosidl_cmake/cmake/rosidl_generate_interfaces.cmake:130 (rosidl_adapt_interfaces)
  CMakeLists.txt:13 (rosidl_generate_interfaces)

[小鱼]

@43996173 在 4.2.1章节构建消息功能包错误string index out of range 中说：

se

这个前面的空格是你复制问题，还是代码里就有

[小鱼]

@43996173 在 4.2.1章节构建消息功能包错误string index out of range 中说：

' sensor_msgs/Image image'

前面多了个空格，书籍是代码格式有部分出现缩进错误，我给你的不是终审稿子，还没修复

[43996173]

@小鱼 好了谢谢