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20e0e7da9b
The new test tests the libpq fallback behavior on an early error, which was fixed in the previous commit. This adds an IS_INJECTION_POINT_ATTACHED() macro, to allow writing injected test code alongside the normal source code. In principle, the new test could've been implemented by an extra test module with a callback that sets the FrontendProtocol global variable, but I think it's more clear to have the test code right where the injection point is, because it has pretty intimate knowledge of the surrounding context it runs in. Reviewed-by: Michael Paquier Discussion: https://www.postgresql.org/message-id/CAOYmi%2Bnwvu21mJ4DYKUa98HdfM_KZJi7B1MhyXtnsyOO-PB6Ww%40mail.gmail.com