Bus error when Catch2 tries catching an exception when using Clang 19

Describe the bug When Catch2 catches an exception thrown by test code in Clang 19.1 (at least the version I have installed using homebrew on my Mac), it results in a Bus error: 10. This occurs regardless of whether or not the exception is raised inside a REQUIRE macro, so long as the exception is caught by Catch2. (If I set up a try block to catch the exception myself before any Catch2 code sees it, it doesn't seem to cause a problem.)

Expected behavior Catch2 should catch the exception and produce some kind of reasonable output. If in a REQUIRE_THROWS macro where an appropriate exception is raised, the test should pass.

Reproduction steps This test file was enough to trigger the problem for me:

#define CATCH_CONFIG_MAIN
#include "catch2/catch_test_macros.hpp"

TEST_CASE( "blah", "blah" ) {

  SECTION( "blah" ) {
    throw(std::runtime_error("Hi"));
  }

}

I typically get output like this:

Randomness seeded to: 638767569
Bus error: 10

Platform information:

OS: macOS 15
Compiler+version: Clang 19.1 (from homebrew)
Catch version: v3.7.1 (compiled from source with same version of Clang)

catchorg / Catch2

Bus error when Catch2 tries catching an exception when using Clang 19 #2913