Crash when deselecting readonly InputTextMultiline

[TheBlueBurger]

Version/Branch of Dear ImGui:

Version: 5a2b1e8
Branch: master
Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_glfw.cpp + imgui_impl_vulkan.cpp
Compiler: v12.2.1-gcc
Operating System: Arch Linux

My Issue/Question:

I get a segmentation fault whenever I select a readonly InputTextMultiline and then deselect it. I ran a git bisect and 5a2b1e8 is the first broken commit. I use imgui_stdlib but it seems to be broken without it too. This is a backtrace:

(gdb) bt
#0  __memcpy_evex_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:318
#1  0x0000555555643a77 in ImGui::InputTextDeactivateHook (id=2670150314) at /home/blueburgers/Documents/Dev/C++/thing/imgui/imgui_widgets.cpp:4039
#2  0x00005555555a00c7 in ImGui::SetActiveID (id=0, window=0x0) at /home/blueburgers/Documents/Dev/C++/thing/imgui/imgui.cpp:3781
#3  0x00005555555a02bf in ImGui::ClearActiveID () at /home/blueburgers/Documents/Dev/C++/thing/imgui/imgui.cpp:3822
#4  0x0000555555646f92 in ImGui::InputTextEx (label=0x55555568c15d "##itm", hint=0x0, buf=0x555555715090 <logs[abi:cxx11]+16> "", buf_size=16, size_arg=..., flags=67387392, 
    callback=0x555555666b87 <InputTextCallback(ImGuiInputTextCallbackData*)>, callback_user_data=0x7fffffffa780) at /home/blueburgers/Documents/Dev/C++/thing/imgui/imgui_widgets.cpp:4734
#5  0x000055555563fc8e in ImGui::InputTextMultiline (label=0x55555568c15d "##itm", buf=0x555555715090 <logs[abi:cxx11]+16> "", buf_size=16, size=..., flags=278528, 
    callback=0x555555666b87 <InputTextCallback(ImGuiInputTextCallbackData*)>, user_data=0x7fffffffa780) at /home/blueburgers/Documents/Dev/C++/thing/imgui/imgui_widgets.cpp:3613
#6  0x0000555555666e0a in ImGui::InputTextMultiline (label=0x55555568c15d "##itm", str=0x555555715080 <logs[abi:cxx11]>, size=..., flags=278528, callback=0x0, user_data=0x0)
    at /home/blueburgers/Documents/Dev/C++/thing/imgui/misc/cpp/imgui_stdlib.cpp:62
#7  0x00005555555637ea in main () at /home/blueburgers/Documents/Dev/C++/thing/src/main.cpp:671

Screenshots/Video

XXX (you can drag files here)

Standalone, minimal, complete and verifiable example: (see #2261)

std::string someString;
// Here's some code anyone can copy and paste to reproduce your issue
ImGui::Begin("Example Bug");
ImGui::InputTextMultiline("##itm", &someString, ImVec2(0, 0), ImGuiInputTextFlags_ReadOnly);
ImGui::End();

[ocornut]

Indeed this was caused by change made for #4714 two weeks ago.
Pushed a fix e8206db
Thanks a lot !