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Now `latefin`'s finalizer is called. Here we # obtain a reference to `func`, which is currently # undergoing `tp_clear`. global func func = self.ref() class Cyclic(tuple): __slots__ = () # 4. The finalizers of all garbage objects are called. In # this case this is only us as `func` doesn't have a # finalizer. def __del__(self): # 5. Create a weakref to `func` now. If we had created # it earlier, it would have been cleared by the # garbage collector before calling the finalizers. self[1].ref = weakref.ref(self[0]) # 6. Drop the global reference to `latefin`. The only # remaining reference is the one we have. global latefin del latefin # 7. Now `func` is `tp_clear`-ed. This drops the last # reference to `Cyclic`, which gets `tp_dealloc`-ed. # This drops the last reference to `latefin`. latefin = LateFin() def func(): pass cyc = tuple.__new__(Cyclic, (func, latefin)) # 1. Create a reference cycle of `cyc` and `func`. func.__module__ = cyc # 2. Make the cycle unreachable, but keep the global reference # to `latefin` so that it isn't detected as garbage. This # way its finalizer will not be called immediately. del func, cyc # 3. Invoke garbage collection, # which will find `cyc` and `func` as garbage. gc.collect() # 9. Previously, this would crash because `func_qualname` # had been NULL-ed out by func_clear(). print(f"{func=}") -crs!\A\s*func=\s*\Z)r rH assertRegex assertFalse)r'codercstdoutstderrs r.test_function_tp_clear_leaves_consistent_statez6GCTests.test_function_tp_clear_leaves_consistent_statesi: x.dD99FF Q !JKKK      rcd}tj||tjddS)Nc,tj}dSr$)sys _getframe)frames rfzGCTests.test_frame..f+sMOOEEErrCrM)r'rs r test_framezGCTests.test_frame)sI $ $ $   q)))))rcLtj|tjgg}||t |}tj}tj|tjz~tjtj||ttjdtj }|t ||dSrB) rFrGrHrrEr get_debug set_debug DEBUG_SAVEALLlenpop)r'Lid_Ldebugrs r test_saveallzGCTests.test_saveall1s  R(((   !uu  UR--...   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! ! ! !rrnc^}}||_||_dSr$rv)r\rrYrns rdo_workz&GCTests.test_bug21435..do_works3A!!##AAFAFFFr)rFrG)r'rxrYrns @@r test_bug21435zGCTests.test_bug21435s          ! ! ! ! ! ! ! !         rc^ddld}fd}||dz}d|d|||dz}d|d |vpd |v|||d z}d |dS) Nraif 1: import gc import _testcapi @_testcapi.with_tp_del class X: def __init__(self, name): self.name = name def __repr__(self): return "" %% self.name def __tp_del__(self): pass x = X('first') x.x = x x.y = X('second') del x gc.set_debug(%s) c\tjdd|gjj}|\}}|j|j|j d|d|S)Nz-Wdrrrrr) Popenr executablePIPE communicatercloserrH returncode)rprrr' subprocesss r run_commandz5GCTests.test_garbage_at_shutdown..run_commands  #.%t!D!!!((A]]__NFF HNN    HNN      Q\1 - - -   VS ) ) )Mr0s=ResourceWarning: gc: 2 uncollectable objects at shutdown; uses zgc.DEBUG_UNCOLLECTABLEs8ResourceWarning: gc: 2 uncollectable objects at shutdowns[, ]s[, ]zgc.DEBUG_SAVEALLs!uncollectable objects at shutdown)rassertIn assertNotInrV)r'rrrrs` @rtest_garbage_at_shutdownz GCTests.test_garbage_at_shutdowns  $      TCZ(( '(. 0 0 0 000T$<<== "#) + + +  +v 5 7 +v 5 @ @ @ T$6677 =vFFFFFrcd}td|\}}}||ddS)Nzif 1: class C: def __del__(self): print('__del__ called') l = [C()] l.append(l) r__del__ called)r rHstrip)r'rrouterrs rtest_gc_main_module_at_shutdownz'GCTests.test_gc_main_module_at_shutdown sE(d33 C &788888rct5}d}d|d}t|d|td|\}}}||dddddS#1swxYwYdS)Nzif 1: class C: def __del__(self): print('__del__ called') l = [C()] l.append(l) zDif 1: import sys sys.path.insert(0, z0) import gctest gctestrr)rr r rHr)r' script_dirmodulerrrrs r#test_gc_ordinary_module_at_shutdownz+GCTests.test_gc_ordinary_module_at_shutdowns ZZ =:FF"zz $D  Hf 5 5 5+D$77LBS   SYY[[*; < < < = = = = = = = = = = = = = = = = = =sAA22A69A6cRd}|ttttdd5}||dddn #1swxYwYt t\}}}||ddS)Nzif 1: class ClassWithDel: def __del__(self): print('__del__ called') a = ClassWithDel() a.link = a raise SystemExit(0)wzutf-8)encodingr) addCleanupr r openwriter rHr)r'rscriptrrrs rtest_global_del_SystemExitz"GCTests.test_global_del_SystemExit-s# ''' &# 0 0 0 F LL                  '// C &788888sAA #A c*tj}|t|d|D]}||t |t |hd||dd||dd||ddtjr2| tj tj tj}tj dtj}||dd|dddz||dd|dd||dd|ddtj dtj}||dd|dddz||dd|dd||dd|dddzdS) Nr2> collected collections uncollectablerrrrrCrR) rF get_statsrHrassertIsInstancedictrWassertGreaterEqual isenabledrrrrG)r'statsstoldnews rtest_get_statszGCTests.test_get_stats;s:  UQ''' < >  OOBI & & & JLLLlnn 1 lnn Q .A}0E0IJJJ Q .A}0EFFF Q .A}0EFFF 1 lnn Q .A}0E0IJJJ Q .A}0EFFF Q .A}0E0IJJJJJrctj|tjdtj|tjddSr)rFfreezerget_freeze_countunfreezerHr:s r test_freezezGCTests.test_freezeUs\  2.00!444  ,..22222rctjg|t fdtjdD|t fdtjdD|t fdtjdDtjd|t fdtjdD|t fd tjdD|t fd tjdDtjd|t fd tjdD|t fd tjdD|t fd tjdDtjd|t fdtjdD|t fdtjdD|t fdtjdDtjdS)Nc3 K|]}|uV dSr$rreelementrJs r z+GCTests.test_get_objects..`'MMWALMMMMMMrr generationc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..c'NNWALNNNNNNrrCc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..frrrRc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..jrrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..mrrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..prrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..trrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..wrrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..zrrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..~rrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..rrc3 K|]}|uV dSr$rrs rrz+GCTests.test_get_objects..rr)rFrGrErVany get_objectsrrIs @rtest_get_objectszGCTests.test_get_objects[s    MMMM!0L0L0LMMMMM    NNNN11M1M1MNNNNN    MMMM!0L0L0LMMMMM    a     MMMM!0L0L0LMMMMM    NNNN11M1M1MNNNNN    MMMM!0L0L0LMMMMM    a     MMMM!0L0L0LMMMMM    NNNN11M1M1MNNNNN    MMMM!0L0L0LMMMMM    a     MMMM!0L0L0LMMMMM    NNNN11M1M1MNNNNN    MMMM!0L0L0LMMMMM     rctj|ttjttjd|t tjd|t tjd|ttjd|ttjddS)Nrii1gX9v?)rFrGrHrr assertRaises ValueErrorrr:s rtest_get_objects_argumentsz"GCTests.test_get_objects_argumentss  R^--..R^t<<<== ? ? ? *bnd;;; *bne<<< )R^S999 )R^U;;;;;rcpGdd}Gfdd|tjtj}|jd~tj|jd|t jdj|jdtj|jdtjdS)NceZdZdZdS)AGCTests.test_resurrection_only_happens_once_per_object..Ac||_dSr$mer:s rr(zJGCTests.test_resurrection_only_happens_once_per_object..A.__init__ rNr)rrrrYr#     rrYc"eZdZdZgZfdZdS)GGCTests.test_resurrection_only_happens_once_per_object..Lazarusrc\xjdz c_j|dSrB) resurrectedresurrected_instancesrEr'r^s rrzOGCTests.test_resurrection_only_happens_once_per_object..Lazarus.__del__s4##q(##-44T:::::rN)rrrrrrr^srr^rs9K$& ! 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!!] 3 3 3 3   111   7 7Atv~~Q4D   T+. 2 2 2   T/2A 6 6 6 6 RZ!,,,,,rzbuilt with -NDEBUGc|tdddl}tjd}|t jd|g|j|j}| \}}|j |j | |d| |dd}| |d |z| |d | |d |z| |d | |d dS)Nctypesra from test.support import gc_collect, SuppressCrashReport a = [1, 2, 3] b = [a] # Avoid coredump when Py_FatalError() calls abort() SuppressCrashReport().__enter__() # Simulate the refcount of "a" being too low (compared to the # references held on it by live data), but keeping it above zero # (to avoid deallocating it): import ctypes ctypes.pythonapi.Py_DecRef(ctypes.py_object(a)) # The garbage collector should now have a fatal error # when it reaches the broken object gc_collect() rr|sGgcmodule\.c:[0-9]+: gc_decref: Assertion "gc_get_refs\(g\) > 0" failed.srefcount is too smalls [0-9a-fA-Fx]+sobject address : sobject refcount : 1sobject type : sobject type name: listsobject repr : \[1, 2, 3\])rrrtextwrapdedentr}rr~rrrrrr)r'rrrrr address_regexs rtest_refcount_errorsz$GCCallbackTests.test_refcount_errorss  h   &   cndD9$.O$.O  5 5    W Y Y Y  % ' ' '*   "] 2 4 4 4  # % % %  "] 2 4 4 4  & ( ( (  - / / / / /rN)rrrrrrrrr4r6rr8rr BUILD_WITH_NDEBUGr>rrrr r Xs"222!!!5556444 - -\ -FX_&)++2/2/++2/2/2/rr c&eZdZdZdZdZdZdS)GCTogglingTestsc,tjdSr$)rFrr:s rrzGCTogglingTests.setUp s rc,tjdSr$)rFrr:s rrzGCTogglingTests.tearDown s rcv td}tjtd}||_|`td}t j| g fd}t j||}dx}x}}g}d}t}|js_|dz }|dkr| d| t d| g|j_| t d D]} | | ddS)NrrCrRc(gdd<dSr$r)r/c2wrrhs rriz2GCTogglingTests.test_bug1055820c..callbackstvvhDGGGr''gc didn't happen after 10000 iterations) r"rFrG keep_c0_aliver&r2r3r+r.rrHrrE) r'c0c1c2ric0wrjunkr%detectorrrFrhs @@rtest_bug1055820cz GCTogglingTests.test_bug1055820csaa[[ a[[ G a[[{2      {2x((R"@ ==&  FA5yy CDDD   SYY * * * KKOOO &  TA&&& & &A   Q % % % % & &rcd g G fddt}|d}tjtd}||_|`td}t j| dx}x}}t}g}d}|js_|dz }|dkr| d| t d| g|j_| t d D]}| |ddS)NceZdZfdZdS)+GCTogglingTests.test_bug1055820d..Dc(gdd<dSr$r)r'rFrhs rrz3GCTogglingTests.test_bug1055820d..D.__del__\s466(QQQrNr)rFrhsrDrS[s3 # # # # # # # #rrUrrCrRrGrH) r"rFrG keep_d0_aliver&r2r3r+r.rrHrrE) r'rUd0rKrLrOrNr%rrFrhs @@rtest_bug1055820dz GCTogglingTests.test_bug1055820dUsl  # # # # # # # # # # #QqTT a[[ G a[[{2R"<== &  FA5yy CDDD   SYY * * * KKOOO &  TA&&& & &A   Q % % % % & &rN)rrrrrrPrXrrrrArAsYD&D&D&LA&A&A&A&A&rrAceZdZdZdS)PythonFinalizationTestscNtjd}td|dS)Na  import ast import codecs # Small AST tree to keep their AST types alive tree = ast.parse("def f(x, y): return 2*x-y") x = [tree] x.append(x) # Put the cycle somewhere to survive until the last GC collection. # Codec search functions are only cleared at the end of # interpreter_clear(). def search_func(encoding): return None search_func.a = x codecs.register(search_func) r)r;r<r )r'rs r test_ast_finiz%PythonFinalizationTests.test_ast_finis2    " t$$$$$rN)rrrr\rrrrZrZs#%%%%%rrZctjatjtjatjt tjztjdSr$) rFrrrrrr DEBUG_LEAKrGrrr setUpModuler_sKlnnGJLLL LNNEL"-'(((JLLLLLrctjttrt dtjt stjdSdS)Nzrestoring automatic collection)rFrrrprintrrrrrrtearDownModulerbsUL0 .///IKKK  r__main__)-r unittest.mock test.supportrrrrtest.support.import_helperrtest.support.os_helperrr r test.support.script_helperr r r rFr sysconfigr;rrr2 _testcapir ImportErrorr rr"r+r6get_config_varsgetr?rTestCaser@r rArZr_rbrmainrrrrpsz============444444;;;;;;;;;;DDDDDDDD))))))  %%%%%%%'''''''MMMv : : : : :& : : :       F      9"";33?#'@y'@'B'B;'OO %WS*<=== hD m/m/m/m/m/h'm/m/m/`N&N&N&N&N&h'N&N&N&b%%%%%h/%%%6    zHMOOOOOs$AA"!A"&A--A76A7