Commits on Oct 17, 2024

1. Fix OpenQASM 2 gate definitions following a shadowed built-in gate …

   Previously, when given an OpenQASM 2 program such as
   
       OPENQASM 2.0;
       gate builtin a { U(0, 0, 0) a; }
       gate not_builtin a { U(pi, pi, pi) a; }
       qreg q[1];
   
       not_builtin q[0];
   
   and a set of `custom_instructions` including a `builtin=True` definition
   for `builtin` (but not for `not_builtin`), the Rust and Python sides
   would get themselves out-of-sync and output a gate that matched a prior
   definition, rather than `not_builtin`.
   
   This was because the Rust side was still issuing `DefineGate` bytecode
   instructions, even for gates whose OpenQASM 2 definitions should have
   been ignored, so Python-space thought there were more gates than
   Rust-space thought there were.

   

   jakelishman committed Oct 17, 2024
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