Qt 5.15.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Clang 13.1.6 (clang-1316.0.21.2.5) (Apple)) on "cocoa" 
OS: macOS 14.4 [darwin version 23.4.0]
Architecture: arm64; features: Neon

File selectors (increasing order of precedence):
  zh_CN unix darwin mac osx macos

2024-11-21 15:51:11.730173+0800 SimpleQtApp[32319:38291159] [qt.qpa.fonts] Populating font family aliases took 73 ms. Replace uses of missing font family "An Unexist Font" with one that exists to avoid this cost.
Process 32319 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=2, address=0x16fe00000)
    frame #0: 0x00000001005575ec QtGui`QTextEngine::shapeText(int) const + 2308
QtGui`QTextEngine::shapeText:
->  0x1005575ec <+2308>: ldrb   w12, [x10]
    0x1005575f0 <+2312>: and    w12, w12, #0xffffffc3
    0x1005575f4 <+2316>: strb   w12, [x10], #0x1
    0x1005575f8 <+2320>: subs   x11, x11, #0x1
Target 0: (SimpleQtApp) stopped.

// main.cpp
#include <QApplication>
#include <QLabel>
#include <QString>

int main(int argc, char *argv[])
{
  QApplication app(argc, argv);

  QLabel label;
  label.resize(200, 100);
  std::string style_sheet = R"(
    QLabel {
      font-family: "An unexist font";
    }
  )";
  label.setStyleSheet(QString::fromStdString(style_sheet)); // Commenting out this line will prevent the crash
  label.setText("字 ⁨");
  label.show();

  return app.exec();
}

# CMakeLists.txt
cmake_minimum_required(VERSION 3.14)

project(SimpleQtApp LANGUAGES CXX)

set(CMAKE_PREFIX_PATH "/Users/huangzhelin/Documents/Tests/Qt5.15.2")
find_package(Qt5 REQUIRED COMPONENTS Widgets)

add_executable(SimpleQtApp main.cpp)

target_link_libraries(SimpleQtApp Qt5::Widgets)