qasm marco return nothing

[contra-bit]

Good Day,

Will working on #14 I have not been able to convert qasm into YaoBlocks.
I have tried the qasm"""""" and the @qasm_string marco.

In my pull request #14 I have written tests, which reproduce this error. The PR is for testing the functionality of blocks.jl in #9 branch.

Here is an example, which works I expect to work, but fail because circuit1 is nothing.

using YaoBlocksQASM
 circuit1 = qasm"""OPENQASM 2.0;
        include "qelib1.inc";
        qreg q[3];
        creg c1[3];
        h q[0];
        CX q[1],q[2];
        cy q[1],q[0];
        cz q[0],q[2];
        x q[0];
        swap q[1],q[2];
        id q[0];
        t q[1];
        rz(0.7) q[2];
        z q[0];
        p(0.7) q[1];
        ry(0.7) q[2];
        y q[0];
        rx(0.7) q[1];
        measure q[0] -> c1[0];
        measure q[1] -> c1[1];
        measure q[2] -> c1[2];    
             """
typeof(circuit1) != nothing