Description
Describe the bug
My application crashes when calling deserializeJson - it started to happen after upgrade to version 7.2.0, in version 7.1.0 this code worked as I expected.
Environment
Here is the environment that I used:
- Microcontroller: ESP32S3
- Core/runtime: Arduino v3.0.5
- IDE: VS Code + PlatformIO
Reproduction
Here is a small snippet that reproduces the issue.
#include <Arduino.h>
#include <ArduinoJSON.h>
String getSupportedShmartFeatures()
{
JsonDocument doc;
auto config = doc.to<JsonObject>();
config["CAM"] = bool(SHMART_USE_CAMERA);
String result;
serializeJson(config, result);
return result;
}
JsonDocument shmartMcuInfoDoc;
String shmartMcuInfo;
String prepareESPInfo()
{
JsonObject obj = shmartMcuInfoDoc.to<JsonObject>();
auto features = getSupportedShmartFeatures();
auto featuresObject = obj["features"].to<JsonObject>();
deserializeJson(featuresObject, features);
serializeJson(shmartMcuInfoDoc, shmartMcuInfo);
return shmartMcuInfo;
}Compiler output
No errors during compilation
Program output
When it crash this is what is logged
assert failed: ArduinoJson::V720PB22::detail::ObjectData& ArduinoJson::V720PB22::detail::VariantData::toObject() VariantData.hpp:537 (type_ == VariantType::Null)
And here is a top stack of decoded esp32 exception:
> Backtrace: 0x403772c2:0x3fca8930 0x4037d2b5:0x3fca8950 0x403833f9:0x3fca8970 0x42003fab:0x3fca8aa0 0x42007232:0x3fca8ac0 0x420072d6:0x3fca8ae0 0x4200b746:0x3fca8b00 0x4200b7ad:0x3fca8ba0 0x4200b7cd:0x3fca8bd0 0x4200b8cd:0x3fca8bf0 0x4200c332:0x3fca8c60 0x42040095:0x3fca8ca0 0x4203f038:0x3fca8cd0 0x4203f6fa:0x3fca8d70 0x4203e3c8:0x3fca8d90 0x420c4386:0x3fca8db0 0x4203e573:0x3fca8dd0 0x4037fcb2:0x3fca8e60
> #0 0x403772c2 in panic_abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_system/panic.c:466
> #1 0x4037d2b5 in esp_system_abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_system/port/esp_system_chip.c:84
> #2 0x403833f9 in __assert_func at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/newlib/assert.c:81
> #3 0x42003fab in ArduinoJson::V720PB22::detail::VariantData::toObject() at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Variant/VariantData.hpp:537 (discriminator 1)
> #4 0x42007232 in ArduinoJson::V720PB22::DeserializationError::Code ArduinoJson::V720PB22::detail::JsonDeserializer<ArduinoJson::V720PB22::detail::Reader<String, void> >::parseVariant<ArduinoJson::V720PB22::detail::AllowAllFilter>(ArduinoJson::V720PB22::detail::VariantData&, ArduinoJson::V720PB22::detail::AllowAllFilter, ArduinoJson::V720PB22::DeserializationOption::NestingLimit) at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Json/JsonDeserializer.hpp:80
> #5 0x420072d6 in ArduinoJson::V720PB22::DeserializationError ArduinoJson::V720PB22::detail::JsonDeserializer<ArduinoJson::V720PB22::detail::Reader<String, void> >::parse<ArduinoJson::V720PB22::detail::AllowAllFilter>(ArduinoJson::V720PB22::detail::VariantData&, ArduinoJson::V720PB22::detail::AllowAllFilter, ArduinoJson::V720PB22::DeserializationOption::NestingLimit) at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Json/JsonDeserializer.hpp:35
> #6 0x4200b746 in ArduinoJson::V720PB22::DeserializationError ArduinoJson::V720PB22::detail::doDeserialize<ArduinoJson::V720PB22::detail::JsonDeserializer, ArduinoJson::V720PB22::JsonObject&, ArduinoJson::V720PB22::detail::Reader<String, void>, ArduinoJson::V720PB22::detail::DeserializationOptions<ArduinoJson::V720PB22::detail::AllowAllFilter> >(ArduinoJson::V720PB22::JsonObject&, ArduinoJson::V720PB22::detail::Reader<String, void>, ArduinoJson::V720PB22::detail::DeserializationOptions<ArduinoJson::V720PB22::detail::AllowAllFilter>) at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Deserialization/deserialize.hpp:57
> #7 0x4200b7ad in ArduinoJson::V720PB22::DeserializationError ArduinoJson::V720PB22::detail::deserialize<ArduinoJson::V720PB22::detail::JsonDeserializer, ArduinoJson::V720PB22::JsonObject&, String&, , void>(ArduinoJson::V720PB22::JsonObject&, String&) at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Deserialization/deserialize.hpp:68
> #8 0x4200b7cd in ArduinoJson::V720PB22::detail::enable_if<ArduinoJson::V720PB22::detail::is_deserialize_destination<ArduinoJson::V720PB22::JsonObject&, void>::value, ArduinoJson::V720PB22::DeserializationError>::type ArduinoJson::V720PB22::deserializeJson<ArduinoJson::V720PB22::JsonObject&, String&>(ArduinoJson::V720PB22::JsonObject&, String&) at .pio/libdeps/esp32s3cam/ArduinoJson/src/ArduinoJson/Json/JsonDeserializer.hpp:705
> #9 0x4200b8cd in prepareESPInfo() at lib/shmart/ShmartUtils.h:34
Expected output:
deserializeJson should work as it did in version 7.1.0 without throwing exception