size_t readBytes() marked 'override', but does not override on ESP32

[charmesal]

I'm trying to get this to work to debug another part of my code but it won't compile.

I'm using Platformio and these dependencies: ArduinoJson@~6.17.1 Adafruit GFX Library@~1.6.1 Timezone@~1.2.2 AsyncMqttClient@~0.8.2 ESP Async WebServer@~1.2.0 NTPClient@~3.1.0 PathVariableHandlers@~2.0.0 RichHttpServer@~2.0.0 DNSServer@~1.1.0 Bleeper@~1.0.4 ArduinoMSGraph@^0.2.0 StreamUtils@^1.4.1 AsyncTCP@~1.1.1 BatteryLevel=https://github.com/dobrishinov/18650CL.git Time=https://github.com/xoseperez/Time#ecb2bb1 WiFiManager=https://github.com/sidoh/WiFiManager#async_support GxEPD2=https://github.com/ZinggJM/GxEPD2#1.3.8

During compilation I get the following error: In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/HammingClient.hpp:11:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:5, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp: In instantiation of 'class StreamUtils::ClientProxy<StreamUtils::ReadLoggingPolicy, StreamUtils::WriteLoggingPolicy, StreamUtils::ConnectForwardingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/LoggingClient.hpp:14:24: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:69:10: error: 'size_t StreamUtils::ClientProxy<ReadPolicy, WritePolicy, ConnectPolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadLoggingPolicy; WritePolicy = StreamUtils::WriteLoggingPolicy; ConnectPolicy = StreamUtils::ConnectForwardingPolicy; size_t = unsigned int]' marked 'override', but does not override size_t readBytes(char *buffer, size_t size) override { ^ .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp: In instantiation of 'class StreamUtils::ClientProxy<StreamUtils::ReadLoggingPolicy, StreamUtils::WriteForwardingPolicy, StreamUtils::ConnectForwardingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ReadLoggingClient.hpp:14:28: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:69:10: error: 'size_t StreamUtils::ClientProxy<ReadPolicy, WritePolicy, ConnectPolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadLoggingPolicy; WritePolicy = StreamUtils::WriteForwardingPolicy; ConnectPolicy = StreamUtils::ConnectForwardingPolicy; size_t = unsigned int]' marked 'override', but does not override .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp: In instantiation of 'class StreamUtils::ClientProxy<StreamUtils::ReadForwardingPolicy, StreamUtils::WriteLoggingPolicy, StreamUtils::ConnectForwardingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/WriteLoggingClient.hpp:15:7: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:69:10: error: 'size_t StreamUtils::ClientProxy<ReadPolicy, WritePolicy, ConnectPolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadForwardingPolicy; WritePolicy = StreamUtils::WriteLoggingPolicy; ConnectPolicy = StreamUtils::ConnectForwardingPolicy; size_t = unsigned int]' marked 'override', but does not override In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:10:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/HammingClient.hpp:11, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:5, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp: In instantiation of 'class StreamUtils::StreamProxy<StreamUtils::ReadLoggingPolicy, StreamUtils::WriteLoggingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/LoggingStream.hpp:13:24: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp:62:10: error: 'size_t StreamUtils::StreamProxy<ReadPolicy, WritePolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadLoggingPolicy; WritePolicy = StreamUtils::WriteLoggingPolicy; size_t = unsigned int]' marked 'override', but does not override size_t readBytes(char *buffer, size_t size) override { ^ In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:22:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/ProgmemStream.hpp:35:10: error: 'size_t StreamUtils::ProgmemStream::readBytes(char*, size_t)' marked 'override', but does not override size_t readBytes(char* buffer, size_t size) override { ^ In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:10:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/HammingClient.hpp:11, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:5, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp: In instantiation of 'class StreamUtils::StreamProxy<StreamUtils::ReadLoggingPolicy, StreamUtils::WriteForwardingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/ReadLoggingStream.hpp:14:7: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp:62:10: error: 'size_t StreamUtils::StreamProxy<ReadPolicy, WritePolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadLoggingPolicy; WritePolicy = StreamUtils::WriteForwardingPolicy; size_t = unsigned int]' marked 'override', but does not override size_t readBytes(char *buffer, size_t size) override { ^ In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:26:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, Compiling .pio\build\esp32\lib334\GxEPD2\epd3c\GxEPD2_213c.cpp.o from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/StringStream.hpp:64:10: error: 'size_t StreamUtils::StringStream::readBytes(char*, size_t)' marked 'override', but does not override size_t readBytes(char* buffer, size_t length) override { ^ In file included from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/ClientProxy.hpp:10:0, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/HammingClient.hpp:11, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.hpp:5, from .pio/libdeps/esp32/StreamUtils/src/StreamUtils.h:5, from .pio/libdeps/esp32/ArduinoMSGraph/src/ArduinoMSGraph.cpp:14: .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp: In instantiation of 'class StreamUtils::StreamProxy<StreamUtils::ReadForwardingPolicy, StreamUtils::WriteLoggingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/WriteLoggingStream.hpp:14:7: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp:62:10: error: 'size_t StreamUtils::StreamProxy<ReadPolicy, WritePolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadForwardingPolicy; WritePolicy = StreamUtils::WriteLoggingPolicy; size_t = unsigned int]' marked 'override', but does not override size_t readBytes(char *buffer, size_t size) override { ^ .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp: In instantiation of 'class StreamUtils::StreamProxy<StreamUtils::ReadForwardingPolicy, StreamUtils::WriteWaitingPolicy>': .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Streams/WriteWaitingStream.hpp:14:7: required from here .pio/libdeps/esp32/StreamUtils/src/StreamUtils/Clients/../Streams/StreamProxy.hpp:62:10: error: 'size_t StreamUtils::StreamProxy<ReadPolicy, WritePolicy>::readBytes(char*, size_t) [with ReadPolicy = StreamUtils::ReadForwardingPolicy; WritePolicy = StreamUtils::WriteWaitingPolicy; size_t = unsigned int]' marked 'override', but does not override *** [.pio\build\esp32\libe7b\ArduinoMSGraph\ArduinoMSGraph.cpp.o] Error 1

I'm only using it here. ReadLoggingStream loggingStream(https.getStream(), Serial); DeserializationError error = deserializeJson(responseDoc, loggingStream);

If you need any more information let me know.

[bblanchon]

Hi @charmesal,

Thank you for reporting this error. Stream::readBytes() has been virtual for 4 years! Please make sure the ESP32 is up to date.

Best regards, Benoit

[charmesal]

Thank you for your quick reply.

That would explain a lot! Sadly I'm using a legacy codebase that won't let me update the framework past 1.9.0. I'm running out of heap space and other issues after upgrading. Is there a way to work around this issue?

[bblanchon]

Please try:

#define STREAMUTILS_STREAM_READBYTES_IS_VIRTUAL 0
#include <StreamUtils.h>

[charmesal]

That seems to fix the compile issue. But it won't print to Serial. Perhaps thats a different problem entirely, if so I'll make a new issue. The code below provides no output to Serial. A normal Serial.print() works just fine. ReadLoggingStream loggingStream(https.getStream(), Serial); DeserializationError error = deserializeJson(responseDoc, loggingStream);

[bblanchon]

Did you try the ArduinoJson Troubleshooter?

[charmesal]

I have not done so. I got put on another project for the time being. I will check it out once I contiue. Thanks alot for your help. I appreciate it!