QVMEror

[daradarry]

Pre-Report Checklist

• [Yes ] I am running the latest versions of pyQuil and the Forest SDK
• [ Yes] I checked to make sure that this bug has not already been reported

Issue Description

The cell executed well as at 3 weeks but stopped last week.

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How to Reproduce

If useful, provide a numbered list of the steps that result in the error.

Otherwise, just fill out the "Code Snippet" and "Error Output" sections below.

Code Snippet

qvm.expectation(ansatz(theta), [sX(qubits[0])], None)

Include a snippet of the pyQuil code that produces the error here.

Error Output

QVMError Traceback (most recent call last)
Input In [37], in <cell line: 10>()
5 k = qvm.expectation(ansatz(alpha), hamiltonian, None)
6 return abs(k)
---> 10 expval_statevec([3.92691588, 1.50477941, 2.71497889, 4.45019336, 2.79647542, 5.49778764])

Input In [37], in expval_statevec(alpha)
3 def expval_statevec(alpha):
4 # vec = qvm.wavefunction(ansatz(alpha))
----> 5 k = qvm.expectation(ansatz(alpha), hamiltonian, None)
6 return abs(k)

File ~/Library/Python/3.10/lib/python/site-packages/pyquil/api/_wavefunction_simulator.py:148, in WavefunctionSimulator.expectation(self, prep_prog, pauli_terms, memory_map)
145 if memory_map is not None:
146 prep_prog = self.augment_program_with_memory_values(prep_prog, memory_map)
--> 148 bare_results = self._expectation(prep_prog, progs)
149 results = coeffs * bare_results
150 if is_pauli_sum:

File ~/Library/Python/3.10/lib/python/site-packages/pyquil/api/_wavefunction_simulator.py:167, in WavefunctionSimulator._expectation(self, prep_prog, operator_programs)
156 warnings.warn(
157 "You have provided a Program rather than a list of Programs. The results "
158 "from expectation will be line-wise expectation values of the "
159 "operator_programs.",
160 SyntaxWarning,
161 )
163 request = self._expectation_request(
164 prep_prog=prep_prog,
165 operator_programs=operator_programs,
166 )
--> 167 response = self._qvm_client.measure_expectation(request)
168 return np.asarray(response.expectations)

File ~/Library/Python/3.10/lib/python/site-packages/pyquil/api/_qvm_client.py:235, in QVMClient.measure_expectation(self, request)
232 if request.seed is not None:
233 payload["rng-seed"] = request.seed
--> 235 return MeasureExpectationResponse(expectations=cast(List[float], self._post_json(payload).json()))

File ~/Library/Python/3.10/lib/python/site-packages/pyquil/api/_qvm_client.py:261, in QVMClient._post_json(self, json)
259 response = http.post("/", json=json)
260 if response.status_code >= 400:
--> 261 raise self._parse_error(response)
262 return response

QVMError: The value
356811923176489970264571492362373784095686656
is not of type
(OR (MOD 4611686018427387901) CONS NULL)
when binding SB-VM::DIMENSIONS

The QVM returned the above error. This could be due to a bug in the server or a
bug in your code. If you suspect this to be a bug in pyQuil or Rigetti Forest,
then please describe the problem in a GitHub issue at:
https://github.com/rigetti/pyquil/issues

Additionally, please copy and paste the output of the above code here.

Environment Context

Operating System:

Python Version (python -V): Python 3.10.5

Quilc Version (quilc --version): 1.23.0 [e6c0939]

QVM Version (qvm --version): 1.17.1 [cf3f91f]

Python Environment Details (pip freeze or conda list):

Copy and paste the output of `pip freeze` or `conda list` here.