Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 8.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo) Running command: "" <> buildModelFMU(Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Utilities_IO_Python36_Functions_Examples_ExchangeWithPassPythonObject",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Utilities_IO_Python36_Functions_Examples_ExchangeWithPassPythonObject",fmuType="me",version="2.0",platforms={"static"}) [:1:1-1:32:writable] Error: Class GC_set_max_heap_size not found in scope (looking for a function or record). Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo): time 1.44/1.44, allocations: 285.5 MB / 292.8 MB, free: 10.47 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001048/0.001047, allocations: 191.4 kB / 361.1 MB, free: 7.109 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.261/1.261, allocations: 205.2 MB / 0.6195 GB, free: 10.33 MB / 474.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0008564/0.0008564, allocations: 86.44 kB / 0.7325 GB, free: 44.25 MB / 0.5105 GB Notification: Performance of FrontEnd - loaded program: time 0.2148/0.2157, allocations: 121.5 MB / 0.8512 GB, free: 2.887 MB / 0.5886 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5042/0.7199, allocations: 115.3 MB / 0.9638 GB, free: 78.38 MB / 0.6667 GB Notification: Performance of FrontEnd - scodeFlatten: time 0.1479/0.8679, allocations: 138.7 MB / 1.099 GB, free: 1.293 MB / 0.698 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0002344/0.8682, allocations: 83.94 kB / 1.099 GB, free: 1.211 MB / 0.698 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2 * Number of variables: 2 Notification: Performance of Generate backend data structure: time 0.01618/0.8844, allocations: 5.991 MB / 1.105 GB, free: 11.26 MB / 0.7136 GB Notification: Performance of prepare preOptimizeDAE: time 3.751e-05/0.8845, allocations: 8.5 kB / 1.105 GB, free: 11.25 MB / 0.7136 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 3.61e-05/0.8845, allocations: 0 / 1.105 GB, free: 11.25 MB / 0.7136 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0001272/0.8846, allocations: 171.7 kB / 1.105 GB, free: 11.05 MB / 0.7136 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.06e-05/0.8847, allocations: 3.938 kB / 1.105 GB, free: 11.05 MB / 0.7136 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.646e-06/0.8847, allocations: 4 kB / 1.105 GB, free: 11.04 MB / 0.7136 GB Notification: Performance of preOpt removeEqualFunctionCalls (simulation): time 5.598e-05/0.8847, allocations: 4 kB / 1.105 GB, free: 11.04 MB / 0.7136 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0001243/0.8849, allocations: 37.69 kB / 1.105 GB, free: 11 MB / 0.7136 GB Notification: Performance of preOpt findStateOrder (simulation): time 7.414e-06/0.8849, allocations: 0 / 1.105 GB, free: 11 MB / 0.7136 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.477e-05/0.8849, allocations: 5.5 kB / 1.105 GB, free: 10.99 MB / 0.7136 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.562e-06/0.8849, allocations: 0 / 1.105 GB, free: 10.99 MB / 0.7136 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.000191/0.8851, allocations: 140 kB / 1.106 GB, free: 10.82 MB / 0.7136 GB Notification: Performance of preOpt comSubExp (simulation): time 5.728e-05/0.8852, allocations: 30.59 kB / 1.106 GB, free: 10.78 MB / 0.7136 GB Notification: Performance of preOpt resolveLoops (simulation): time 2.404e-05/0.8852, allocations: 13.95 kB / 1.106 GB, free: 10.77 MB / 0.7136 GB Notification: Performance of preOpt evalFunc (simulation): time 2.919e-05/0.8852, allocations: 4.594 kB / 1.106 GB, free: 10.76 MB / 0.7136 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.203e-05/0.8853, allocations: 35.09 kB / 1.106 GB, free: 10.72 MB / 0.7136 GB Notification: Performance of pre-optimization done (n=2): time 1.082e-06/0.8853, allocations: 0.8438 kB / 1.106 GB, free: 10.72 MB / 0.7136 GB Notification: Performance of matching and sorting (n=2): time 0.0002108/0.8855, allocations: 54.8 kB / 1.106 GB, free: 10.66 MB / 0.7136 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.597e-05/0.8855, allocations: 51.41 kB / 1.106 GB, free: 10.6 MB / 0.7136 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 6.634e-05/0.8856, allocations: 97.75 kB / 1.106 GB, free: 10.5 MB / 0.7136 GB Notification: Performance of collectPreVariables (initialization): time 1.697e-05/0.8856, allocations: 25.7 kB / 1.106 GB, free: 10.46 MB / 0.7136 GB Notification: Performance of collectInitialEqns (initialization): time 3.758e-05/0.8857, allocations: 81.14 kB / 1.106 GB, free: 10.38 MB / 0.7136 GB Notification: Performance of collectInitialBindings (initialization): time 2.127e-05/0.8857, allocations: 3.938 kB / 1.106 GB, free: 10.38 MB / 0.7136 GB Notification: Performance of simplifyInitialFunctions (initialization): time 3.847e-06/0.8857, allocations: 0.7188 kB / 1.106 GB, free: 10.38 MB / 0.7136 GB Notification: Performance of setup shared object (initialization): time 0.0001034/0.8858, allocations: 324.4 kB / 1.106 GB, free: 10.05 MB / 0.7136 GB Notification: Performance of preBalanceInitialSystem (initialization): time 1.666e-05/0.8858, allocations: 4.75 kB / 1.106 GB, free: 10.05 MB / 0.7136 GB Notification: Performance of partitionIndependentBlocks (initialization): time 1.367e-05/0.8859, allocations: 8 kB / 1.106 GB, free: 10.04 MB / 0.7136 GB Notification: Performance of analyzeInitialSystem (initialization): time 5.923e-05/0.8859, allocations: 16.8 kB / 1.106 GB, free: 10.03 MB / 0.7136 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.533e-06/0.8859, allocations: 0.5625 kB / 1.106 GB, free: 10.03 MB / 0.7136 GB Notification: Performance of matching and sorting (n=2) (initialization): time 0.0001078/0.886, allocations: 54.16 kB / 1.106 GB, free: 9.969 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 1.072e-05/0.8861, allocations: 4 kB / 1.106 GB, free: 9.965 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.615e-05/0.8861, allocations: 8.484 kB / 1.106 GB, free: 9.957 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.086e-05/0.8861, allocations: 0.5625 kB / 1.106 GB, free: 9.957 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 6.61e-07/0.8861, allocations: 0.5 kB / 1.106 GB, free: 9.957 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.216e-06/0.8861, allocations: 0 / 1.106 GB, free: 9.957 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 1.566e-05/0.8861, allocations: 5.219 kB / 1.106 GB, free: 9.953 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.796e-05/0.8862, allocations: 4 kB / 1.106 GB, free: 9.949 MB / 0.7136 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (2): * Single equations (assignments): 0 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 6.027e-05/0.8862, allocations: 105.2 kB / 1.106 GB, free: 9.84 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 1.137e-05/0.8863, allocations: 4 kB / 1.106 GB, free: 9.836 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001699/0.8864, allocations: 76.41 kB / 1.107 GB, free: 9.754 MB / 0.7136 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.555e-06/0.8864, allocations: 1.438 kB / 1.107 GB, free: 9.754 MB / 0.7136 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.163e-06/0.8864, allocations: 0.8438 kB / 1.107 GB, free: 9.754 MB / 0.7136 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.596e-06/0.8865, allocations: 7.922 kB / 1.107 GB, free: 9.746 MB / 0.7136 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001019/0.8866, allocations: 134.2 kB / 1.107 GB, free: 9.578 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.003e-06/0.8866, allocations: 3.984 kB / 1.107 GB, free: 9.574 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 4.41e-07/0.8866, allocations: 4.031 kB / 1.107 GB, free: 9.57 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.232e-06/0.8866, allocations: 0 / 1.107 GB, free: 9.57 MB / 0.7136 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.903e-06/0.8866, allocations: 0 / 1.107 GB, free: 9.57 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.134e-06/0.8866, allocations: 4 kB / 1.107 GB, free: 9.566 MB / 0.7136 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.368e-06/0.8866, allocations: 3.906 kB / 1.107 GB, free: 9.562 MB / 0.7136 GB Notification: Performance of postOpt detectJacobianSparsePattern (simulation): time 9.123e-05/0.8867, allocations: 63.75 kB / 1.107 GB, free: 9.484 MB / 0.7136 GB Notification: Performance of postOpt generateSymbolicLinearization (simulation): time 0.0001802/0.8869, allocations: 457.5 kB / 1.107 GB, free: 9.016 MB / 0.7136 GB Notification: Performance of postOpt removeConstants (simulation): time 9.709e-05/0.887, allocations: 85.03 kB / 1.107 GB, free: 8.914 MB / 0.7136 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.232e-05/0.887, allocations: 0 / 1.107 GB, free: 8.914 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 5.326e-05/0.8871, allocations: 4 kB / 1.107 GB, free: 8.91 MB / 0.7136 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 1.553e-05/0.8871, allocations: 4 kB / 1.107 GB, free: 8.906 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.755e-06/0.8871, allocations: 4.844 kB / 1.107 GB, free: 8.902 MB / 0.7136 GB Notification: Performance of sort global known variables: time 3.465e-05/0.8872, allocations: 79.28 kB / 1.107 GB, free: 8.824 MB / 0.7136 GB Notification: Performance of remove unused functions: time 0.0008266/0.888, allocations: 91.86 kB / 1.107 GB, free: 8.734 MB / 0.7136 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (1): * Single equations (assignments): 0 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Utilities/IO/Python36/Functions/BaseClasses/exchange.mo:2:1-81:13:writable] Warning: Could not find library python3.6m in either of: /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.so /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.so [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Utilities/IO/Python36/Functions/BaseClasses/PythonObject.mo:5:5-46:20:writable] Warning: Could not find library python3.6m in either of: /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.so /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.so [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Utilities/IO/Python36/Functions/BaseClasses/PythonObject.mo:48:3-78:17:writable] Warning: Could not find library python3.6m in either of: /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib/x86_64-linux-gnu/omc/libpython3.6m.so /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.a /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OMCompiler/build/lib//libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/binaries/Buildings/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/x86_64-linux/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/linux64/libpython3.6m.so /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.a /home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/Resources/Library/libpython3.6m.so Notification: Performance of Backend phase and start with SimCode phase: time 0.0007325/0.8887, allocations: 347.8 kB / 1.108 GB, free: 8.484 MB / 0.7136 GB Notification: Performance of simCode: created initialization part: time 0.0001082/0.8889, allocations: 67.39 kB / 1.108 GB, free: 8.406 MB / 0.7136 GB Notification: Performance of simCode: created event and clocks part: time 2.474e-06/0.8889, allocations: 0 / 1.108 GB, free: 8.406 MB / 0.7136 GB Notification: Performance of simCode: created simulation system equations: time 2.412e-05/0.8889, allocations: 45.69 kB / 1.108 GB, free: 8.355 MB / 0.7136 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 9.633e-05/0.889, allocations: 0 / 1.108 GB, free: 8.355 MB / 0.7136 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0005072/0.8895, allocations: 183.1 kB / 1.108 GB, free: 8.156 MB / 0.7136 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002062/0.8898, allocations: 0.6849 MB / 1.109 GB, free: 7.445 MB / 0.7136 GB Notification: Performance of SimCode: time 3.01e-07/0.8898, allocations: 0 / 1.109 GB, free: 7.445 MB / 0.7136 GB (rm -f Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.pipe >> ../files/Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_maint_8_0_x_Buildings_Utilities_IO_Python36_Functions_Examples_ExchangeWithPassPythonObject_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_maint_8_0_x_Buildings_Utilities_IO_Python36_Functions_Examples_ExchangeWithPassPythonObject.fmu > Buildings_maint.8.0.x_Buildings.Utilities.IO.Python36.Functions.Examples.ExchangeWithPassPythonObject.pipe 2>&1)