Eclipse flags C++ string literal as "Invalid Argument"

Question

After moving all my code to a new M2 MacBook, my old Eclipse 4.17 (2020-09) now flags string literal arguments as "Invalid Argument".

I've since updated to the latest Eclipse 2023-06/AArch64", installed CDT, the PDT PHP Tools and Wild Web.

The problem with string literals in C++ remains. I've read a ton of old posts (like this one) and tried rebuilding the index, freshening all files, and setting the discovery to -std=c++11 per this post.

For example, given the trivial program below, the call to test("bobo") is flagged as an invalid argument, even though std::string is bridged to literal strings and the program compiles without error.

Any suggestions?

#include <string>

void test(const std::string &s)
{ }

int main(int argc, char **argv)
{
    std::string s;
    test(s);       // OK
    test("bobo");  // Eclipse says "Invalid Argument"
}