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Description
Exceptions constructed from an std::string bypass catch handlers and terminate the program. The same exception constructed from a string literal behaves normally. The following program compiled with Clang 14 catches both exceptions. However, on Clang 18 the "dynamic" version terminates the program with the following message:
libc++abi: terminating due to uncaught exception of type std::runtime_error: dynamic
// clang++ -std=c++20
#include <iostream>
#include <stdexcept>
#include <string>
void literal() {
throw std::runtime_error("literal");
}
void dynamic() {
throw std::runtime_error(std::string("dynamic"));
}
int main() {
for (auto f : {literal, dynamic}) {
try {
f();
} catch (std::runtime_error e) {
std::cerr << "caught: " << e.what() << std::endl;
}
}
}
Working compiler:
- Apple clang version 14.0.3 (clang-1403.0.22.14.1)
- Target: arm64-apple-darwin22.5.0
- Thread model: posix
Compiler that fails:
- Homebrew clang version 18.1.6
- Target: arm64-apple-darwin22.5.0
- Thread model: posix