pragma pack(push, 1) will crash

[atomburg]

Description

use different pack, e.g. 1 for source1.cpp and other for source2.cpp, will crash the second json instance.

Reproduction steps

#pragma pack(push, 1)
json j1;

#pragma pack(push,4)
json j2;// crashed on contains(...) call.

Expected vs. actual results

crash

Minimal code example

Error messages

Compiler and operating system

msvc2022

Library version

3.11.3

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[nlohmann]

Please provide a complete code example.

[gregmarr]

As @nlohmann says, we would need to see a complete code example, but this seems like it's going to be a One Definition Rule violation.