Imgui draw cpp ошибка

diff --git a/imconfig.h b/imconfig.h
index 876cf32..28a886e 100644
--- a/imconfig.h
+++ b/imconfig.h
@@ -19,6 +19,22 @@
 //#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
 //#define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts
 
+#ifdef TRIGGER_BUG_5343
+#  define IM_ASSERT(_EXPR) NonHintingAssert(_EXPR)
+extern int runtime_value;
+int MayThrow()
+{
+  if(runtime_value)
+    return 4;
+  throw 2;
+}
+void NonHintingAssert(bool ok)
+{
+  if(!ok)
+    throw MayThrow(); // any function or constructor the may also conditionally throw
+}
+#endif
+
 //---- Define attributes of all API symbols declarations, e.g. for DLL under Windows
 // Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
 // DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 6082f10..140e571 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@@ -2512,7 +2512,9 @@ static bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
         if (src_tmp.GlyphsCount == 0)
             continue;
 
+#ifndef NO_PACK_RECTS
         stbrp_pack_rects((stbrp_context*)spc.pack_info, src_tmp.Rects, src_tmp.GlyphsCount);
+#endif
 
         // Extend texture height and mark missing glyphs as non-packed so we won't render them.
         // FIXME: We are not handling packing failure here (would happen if we got off TEX_HEIGHT_MAX or if a single if larger than TexWidth?)
@@ -2630,6 +2632,11 @@ void ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* stbrp_context_opa
     ImVector<ImFontAtlasCustomRect>& user_rects = atlas->CustomRects;
     IM_ASSERT(user_rects.Size >= 1); // We expect at least the default custom rects to be registered, else something went wrong.
 
+#ifdef WORKAROUND_BUG_5343
+    if (user_rects.Size < 1)
+        __builtin_unreachable();
+#endif
+
     ImVector<stbrp_rect> pack_rects;
     pack_rects.resize(user_rects.Size);
     memset(pack_rects.Data, 0, (size_t)pack_rects.size_in_bytes());

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/12.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++,d --enable-bootstrap --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --with-build-config=bootstrap-lto --with-linker-hash-style=gnu --with-system-zlib --enable-__cxa_atexit --enable-cet=auto --enable-checking=release --enable-clocale=gnu --enable-default-pie --enable-default-ssp --enable-gnu-indirect-function --enable-gnu-unique-object --enable-libstdcxx-backtrace --enable-link-serialization=1 --enable-linker-build-id --enable-lto --enable-multilib --enable-plugin --enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch --disable-werror
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.1 20230201 (GCC)

$ gcc -O3 -I. -DIMGUI_ENABLE_FREETYPE -c imgui_draw.cpp
# (no output)

$ gcc -O3 -I. -DIMGUI_ENABLE_FREETYPE -c imgui_draw.cpp -DTRIGGER_BUG_5343
imgui_draw.cpp: In function ‘void ImFontAtlasBuildPackCustomRects(ImFontAtlas*, void*)’:
imgui_draw.cpp:2642:11: warning: ‘void* memset(void*, int, size_t)’ specified size between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
 2642 |     memset(pack_rects.Data, 0, (size_t)pack_rects.size_in_bytes());
      |     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$ gcc -O3 -I. -DIMGUI_ENABLE_FREETYPE -c imgui_draw.cpp -DTRIGGER_BUG_5343 -DWORKAROUND_BUG_5343
# (no output)

$ gcc -O3 -DNO_PACK_RECTS -c imgui_draw.cpp
# (no output)

$ gcc -O3 -DNO_PACK_RECTS -c imgui_draw.cpp -DTRIGGER_BUG_5343
imgui_draw.cpp: In function ‘void ImFontAtlasBuildPackCustomRects(ImFontAtlas*, void*)’:
imgui_draw.cpp:2642:11: warning: ‘void* memset(void*, int, size_t)’ specified size between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
 2642 |     memset(pack_rects.Data, 0, (size_t)pack_rects.size_in_bytes());
      |     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$ gcc -O3 -DNO_PACK_RECTS -c imgui_draw.cpp -DTRIGGER_BUG_5343 -DWORKAROUND_BUG_5343
# (no output)