PubSub: freed memory is accessed during writerGroup removal

[MichalTyndel]

PubSub: freed memory is accessed during writerGroup removal

[JohannesKauffmann]

I've checked out open62541 at cc806cb47, built the library with -DUA_ENABLE_PUBSUB=ON -DUA_ENABLE_AMALGAMATION=ON, changed #include open62541/server.h to just #include open62541.h, but can't compile your example (also without amalgamation):

$ gcc -O2 -Wall -Wextra -fsanitize=address example1.c -I /usr/local/include/  -L /usr/local/lib/ -lopen62541.a
./example1.c: In function ‘addInt32Variable’:
./example1.c:28:53: error: ‘UA_ACCESSLEVELTYPE_CURRENTREAD’ undeclared (first use in this function)
   28 |                                      .accessLevel = UA_ACCESSLEVELTYPE_CURRENTREAD | UA_ACCESSLEVELTYPE_CURRENTWRITE};
      |                                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./example1.c:28:53: note: each undeclared identifier is reported only once for each function it appears in
./example1.c:28:86: error: ‘UA_ACCESSLEVELTYPE_CURRENTWRITE’ undeclared (first use in this function)
   28 |                                      .accessLevel = UA_ACCESSLEVELTYPE_CURRENTREAD | UA_ACCESSLEVELTYPE_CURRENTWRITE};
      |                                                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[MichalTyndel]

@JohannesKauffmann sorry for late reply. Those defines should be visible in the example. They are deifined in types_generated.h, which is included by types.h, which in turn is included by server.h.
Anyway here is CMakeLists file I used to build the example:
CMakeLists.txt

[jpfr]

The fix arrives in #6284