Fix VTestParser segfault

[hugary1995]

close #112

[reverendbedford]

Coverage after merging vtestparser_112 into main

90.19%

Coverage Report

File	Branches	Funcs	Lines	Uncovered Lines
include/neml2/base
CrossRef.h	100%	89.29%	100%
Factory.h	100%	11.11%	100%
NEML2Object.h	100%	33.33%	50%	50
OptionCollection.h	100%	0%	0%	40, 49
OptionSet.h	100%	43.87%	79.49%	117, 120, 123, 135, 66, 74, 78, 82
Registry.h	100%	96.34%	100%
UniqueVector.h	100%	17.86%	77.78%	117, 169, 171–172
include/neml2/drivers
Driver.h	100%	0%	0%	56
include/neml2/misc
error.h	100%	37.67%	82.35%	35–36, 38
math.h	100%	100%	100%
parser_utils.h	100%	53.13%	88%	37–38, 40
utils.h	100%	63.77%	76.27%	173, 239, 241–246, 267, 302, 304–307
include/neml2/models
BufferStore.h	100%	47.06%	58.62%	106, 108, 110–111, 113–114, 128, 130–132, 157, 161
ImplicitUpdate.h	100%	100%	100%
LabeledAxisInterface.h	100%	0%	0%	43, 45, 50, 52–53
LinearInterpolation.h	100%	14.29%	100%
Model.h	100%	23.53%	52.94%	177, 179–182, 190, 194, 196–199, 207, 209, 72, 78, 83
NonlinearParameter.h	100%	9.09%	100%
ParameterStore.h	100%	31.25%	80.77%	119, 133, 135–137
include/neml2/tensors
BatchTensorBase.h	100%	58.82%	95.35%	262, 264
BatchTensorValue.h	100%	14.93%	50%	40, 67, 69, 71
FixedDimTensor.h	100%	18.18%	100%
LabeledAxis.h	100%	0%	0%	107, 110, 113, 139, 67, 72–74
LabeledAxisAccessor.h	100%	50%	50%	59
LabeledTensor.h	100%	40.38%	87.88%	112, 47, 93, 97
Scalar.h	100%	60%	100%
Transformable.h	100%	0%	0%	44
VecBase.h	100%	75%	100%
src/neml2/base
CrossRef.cxx	100%	60.71%	100%
Factory.cxx	100%	80%	68.18%	45, 47–51, 62
HITParser.cxx	100%	100%	100%
NEML2Object.cxx	100%	100%	100%
OptionCollection.cxx	100%	100%	100%
OptionSet.cxx	100%	80%	82.76%	112, 114, 124, 126, 35
Registry.cxx	100%	100%	100%
src/neml2/drivers
Driver.cxx	100%	100%	87.50%	35
TransientDriver.cxx	100%	93.33%	81.90%	115, 149, 151–153, 156–157, 161–165, 167–172, 175–176, 46
src/neml2/drivers/solid_mechanics
SolidMechanicsDriver.cxx	100%	100%	97.37%	43
src/neml2/misc
error.cxx	100%	100%	100%
math.cxx	100%	85.71%	61.67%	110, 112–113, 116, 118, 122–123, 125, 128, 130, 132–134, 137, 139–142, 146–147, 150, 152–153
parser_utils.cxx	100%	100%	98.18%	73
utils.cxx	100%	100%	86.67%	44, 52
src/neml2/models
BackwardEulerTimeIntegration.cxx	100%	100%	97.78%	40
ComposedModel.cxx	100%	100%	97.85%	116, 295, 308, 37
Data.cxx	100%	40%	27.27%	43, 45, 47–49, 52, 54, 56–59, 61–62, 65, 67–68
ForceRate.cxx	100%	100%	98%	41
ForwardEulerTimeIntegration.cxx	100%	100%	97.62%	41
IdentityMap.cxx	100%	100%	94.74%	41
ImplicitUpdate.cxx	100%	100%	97.73%	38
Interpolation.cxx	100%	45.45%	96%	38
LabeledAxisInterface.cxx	100%	100%	100%
LinearInterpolation.cxx	100%	45.45%	100%
Model.cxx	100%	100%	95.09%	164–166, 247, 39, 51, 69, 86
NonlinearParameter.cxx	100%	59.09%	90.91%	36
ParameterStore.cxx	100%	18.18%	70.59%	37, 60, 62–63, 68
SR2Invariant.cxx	100%	100%	96.23%	110, 40
StateRate.cxx	100%	66.67%	98%	41
SumModel.cxx	100%	100%	95.83%	41
src/neml2/models/crystallography
CrystalGeometry.cxx	100%	100%	98.13%	187, 50
CubicCrystal.cxx	100%	100%	90.91%	48
MillerIndex.cxx	100%	100%	100%
crystallography.cxx	100%	100%	98.33%	107
src/neml2/models/crystallography/user_tensors
FillMillerIndex.cxx	100%	100%	91.67%	40
SymmetryFromOrbifold.cxx	100%	100%	87.50%	41
src/neml2/models/solid_mechanics
AssociativeIsotropicPlasticHardening.cxx	100%	100%	96.43%	39
AssociativeKinematicPlasticHardening.cxx	100%	100%	96.67%	40
AssociativePlasticFlow.cxx	100%	100%	96.43%	39
ChabochePlasticHardening.cxx	100%	100%	97.62%	43
ElasticStrain.cxx	100%	100%	96.67%	43
Elasticity.cxx	100%	100%	94.12%	40
FlowRule.cxx	100%	100%	88.89%	35
IsotropicHardening.cxx	100%	100%	91.67%	36
IsotropicMandelStress.cxx	100%	100%	100%
KinematicHardening.cxx	100%	100%	90.91%	36
LinearIsotropicElasticity.cxx	100%	100%	96.15%	39
LinearIsotropicHardening.cxx	100%	100%	92.86%	37
LinearKinematicHardening.cxx	100%	100%	93.75%	38
MandelStress.cxx	100%	100%	90.91%	38
Normality.cxx	100%	100%	97.67%	41
OverStress.cxx	100%	100%	96%	40
PerzynaPlasticFlowRate.cxx	100%	100%	92.31%	38, 71
PlasticFlowRate.cxx	100%	100%	90.91%	36
RateIndependentPlasticFlowConstraint.cxx	100%	100%	97.22%	40
TotalStrain.cxx	100%	100%	96.30%	43
VoceIsotropicHardening.cxx	100%	100%	95.45%	38
YieldFunction.cxx	100%	100%	97.06%	40
src/neml2/solvers
NewtonNonlinearSolver.cxx	100%	100%	92%	49, 73
NonlinearSolver.cxx	100%	100%	91.67%	37
NonlinearSystem.cxx	100%	100%	90.48%	36, 46
Solver.cxx	100%	100%	87.50%	35
src/neml2/tensors
BatchTensor.cxx	100%	100%	100%
BatchTensorBase.cxx	100%	31.83%	94.26%	211, 354, 376, 378, 59, 61, 63
FixedDimTensor.cxx	100%	58.44%	100%
LabeledAxis.cxx	100%	92.86%	82.17%	104, 107, 109, 129, 188, 195, 205, 209–210, 212, 235, 323, 325–329, 337, 387, 392, 394, 400, 402–404, 406–407, 410, 412–413, 415, 417–422, 424–426, 92
LabeledAxisAccessor.cxx	100%	100%	100%
LabeledMatrix.cxx	100%	60%	56%	42, 44–49, 77, 79, 82–83
LabeledTensor.cxx	100%	55.56%	83.10%	116, 118, 178, 180, 206, 208, 59–61, 63, 94, 96
LabeledTensor3D.cxx	100%	66.67%	66.67%	33, 35–43
LabeledVector.cxx	100%	60%	59.09%	37, 39–42, 53, 55–56, 65
Quaternion.cxx	100%	100%	100%
R2.cxx	100%	100%	100%
R2Base.cxx	100%	100%	100%
R3.cxx	100%	100%	100%
R4.cxx	100%	100%	100%
Rot.cxx	100%	87.50%	90%	36–37, 39
SR2.cxx	100%	100%	100%
SSR4.cxx	100%	81.25%	89.47%	124, 126, 130, 132, 136, 138
Scalar.cxx	100%	100%	100%
Transformable.cxx	100%	83.33%	83.33%	57, 59
Vec.cxx	100%	100%	100%
VecBase.cxx	100%	62.50%	95.65%	95
WR2.cxx	100%	100%	100%
src/neml2/tensors/user_tensors
EmptyBatchTensor.cxx	100%	100%	88.89%	38
EmptyFixedDimTensor.cxx	100%	100%	87.50%	38
Fill3DVec.cxx	100%	100%	91.67%	37
FillR2.cxx	100%	100%	85.71%	37, 65, 67, 70
FillSR2.cxx	100%	100%	77.78%	37, 55–56, 58
FullBatchTensor.cxx	100%	100%	90.91%	39
FullFixedDimTensor.cxx	100%	100%	90%	39
IdentityBatchTensor.cxx	100%	100%	90%	38
LinspaceBatchTensor.cxx	100%	100%	93.33%	41
LinspaceFixedDimTensor.cxx	100%	100%	93.33%	41
LogspaceBatchTensor.cxx	100%	100%	94.12%	42
LogspaceFixedDimTensor.cxx	100%	100%	94.12%	42
OnesBatchTensor.cxx	100%	100%	88.89%	38
OnesFixedDimTensor.cxx	100%	100%	87.50%	38
UserBatchTensor.cxx	100%	100%	95%	39
UserFixedDimTensor.cxx	100%	100%	73.68%	39, 53, 55, 57, 59
ZerosBatchTensor.cxx	100%	100%	88.89%	38
ZerosFixedDimTensor.cxx	100%	100%	87.50%	38