Compiling gdbstub.c results in 'handle' may be used uninitialized errors with -O2 (IDFGH-8213)

[gtjoseph]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

v5.1-dev-537-g91e8312f03

Operating System used.

Linux

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

No response

What is the expected behavior?

Successful compile

What is the actual behavior?

/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:862:26: error: 'handle' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Steps to reproduce.

1. Open any ESP-IDF project/example, etc. I used esp-idf/examples/system/gdbstub
2. In menuconfig, "Compiler options", set "Optimization Level" to "(Optimize for performance (-O2))"
3. In menuconfig, set "Panic handler behaviour (GDBStub on panic (or runtime))" If using the gdbstub example, this will already be set.
4. build

sdkconfig.txt

Build or installation Logs.

[590/867] Building C object esp-idf/esp_gdbstub/CMakeFiles/__idf_esp_gdbstub.dir/src/gdbstub.c.objFAILED: esp-idf/esp_gdbstub/CMakeFiles/__idf_esp_gdbstub.dir/src/gdbstub.c.obj 
/home/gtjoseph/.espressif/tools/xtensa-esp32s3-elf/esp-2022r1-11.2.0/xtensa-esp32s3-elf/bin/xtensa-esp32s3-elf-gcc  -I/usr/src/mcu/esp32/projects/gdbstub/build/config -I/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/include -I/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/private_include -I/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/xtensa -I/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/esp32s3 -I/usr/src/mcu/esp32/esp-idf/components/newlib/platform_include -I/usr/src/mcu/esp32/esp-idf/components/freertos/FreeRTOS-Kernel/include -I/usr/src/mcu/esp32/esp-idf/components/freertos/esp_additions/include/freertos -I/usr/src/mcu/esp32/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/include -I/usr/src/mcu/esp32/esp-idf/components/freertos/esp_additions/include -I/usr/src/mcu/esp32/esp-idf/components/esp_hw_support/include -I/usr/src/mcu/esp32/esp-idf/components/esp_hw_support/include/soc -I/usr/src/mcu/esp32/esp-idf/components/esp_hw_support/include/soc/esp32s3 -I/usr/src/mcu/esp32/esp-idf/components/esp_hw_support/port/esp32s3/. -I/usr/src/mcu/esp32/esp-idf/components/esp_hw_support/port/esp32s3/private_include -I/usr/src/mcu/esp32/esp-idf/components/heap/include -I/usr/src/mcu/esp32/esp-idf/components/log/include -I/usr/src/mcu/esp32/esp-idf/components/soc/include -I/usr/src/mcu/esp32/esp-idf/components/soc/esp32s3/. -I/usr/src/mcu/esp32/esp-idf/components/soc/esp32s3/include -I/usr/src/mcu/esp32/esp-idf/components/hal/esp32s3/include -I/usr/src/mcu/esp32/esp-idf/components/hal/include -I/usr/src/mcu/esp32/esp-idf/components/hal/platform_port/include -I/usr/src/mcu/esp32/esp-idf/components/esp_rom/include -I/usr/src/mcu/esp32/esp-idf/components/esp_rom/include/esp32s3 -I/usr/src/mcu/esp32/esp-idf/components/esp_rom/esp32s3 -I/usr/src/mcu/esp32/esp-idf/components/esp_common/include -I/usr/src/mcu/esp32/esp-idf/components/esp_system/include -I/usr/src/mcu/esp32/esp-idf/components/esp_system/port/soc -I/usr/src/mcu/esp32/esp-idf/components/esp_system/port/include/private -I/usr/src/mcu/esp32/esp-idf/components/xtensa/include -I/usr/src/mcu/esp32/esp-idf/components/xtensa/esp32s3/include -I/usr/src/mcu/esp32/esp-idf/components/lwip/include -I/usr/src/mcu/esp32/esp-idf/components/lwip/include/apps -I/usr/src/mcu/esp32/esp-idf/components/lwip/include/apps/sntp -I/usr/src/mcu/esp32/esp-idf/components/lwip/lwip/src/include -I/usr/src/mcu/esp32/esp-idf/components/lwip/port/esp32/include -I/usr/src/mcu/esp32/esp-idf/components/lwip/port/esp32/include/arch -mlongcalls  -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-enum-conversion -gdwarf-4 -ggdb -O2 -fmacro-prefix-map=/usr/src/mcu/esp32/projects/gdbstub=. -fmacro-prefix-map=/usr/src/mcu/esp32/esp-idf=/IDF -fstrict-volatile-bitfields -Wno-error=unused-but-set-variable -fno-jump-tables -fno-tree-switch-conversion -DconfigENABLE_FREERTOS_DEBUG_OCDAWARE=1 -std=gnu17 -Wno-old-style-declaration -D_GNU_SOURCE -DIDF_VER=\"v5.1-dev-537-g91e8312f03-dirty\" -DESP_PLATFORM -D_POSIX_READER_WRITER_LOCKS -MD -MT esp-idf/esp_gdbstub/CMakeFiles/__idf_esp_gdbstub.dir/src/gdbstub.c.obj -MF esp-idf/esp_gdbstub/CMakeFiles/__idf_esp_gdbstub.dir/src/gdbstub.c.obj.d -o esp-idf/esp_gdbstub/CMakeFiles/__idf_esp_gdbstub.dir/src/gdbstub.c.obj -c /usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c: In function 'esp_gdbstub_handle_command':
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:862:26: error: 'handle' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  862 |     BaseType_t core_id = xTaskGetAffinity(handle);
      |                          ^~~~~~~~~~~~~~~~~~~~~~~~
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:860:18: note: 'handle' was declared here
  860 |     TaskHandle_t handle;
      |                  ^~~~~~
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:853:18: error: 'handle' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  853 |         result = eTaskGetState(handle);
      |                  ^~~~~~~~~~~~~~~~~~~~~
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:850:18: note: 'handle' was declared here
  850 |     TaskHandle_t handle;
      |                  ^~~~~~
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c: In function 'getActiveTaskNum':
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:853:18: error: 'handle' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  853 |         result = eTaskGetState(handle);
      |                  ^~~~~~~~~~~~~~~~~~~~~
/usr/src/mcu/esp32/esp-idf/components/esp_gdbstub/src/gdbstub.c:850:18: note: 'handle' was declared here
  850 |     TaskHandle_t handle;
      |                  ^~~~~~
cc1: some warnings being treated as errors
[611/867] Building C object esp-idf/http_parser/CMakeFiles/__idf_http_parser.dir/http_parser.c.objninja: build stopped: subcommand failed.
ninja failed with exit code 1, output of the command is in the /usr/src/mcu/esp32/projects/gdbstub/build/log/idf_py_stderr_output_163541 and /usr/src/mcu/esp32/projects/gdbstub/build/log/idf_py_stdout_output_163541

### More Information.

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