Hi Ronald,
Can you clarify what you're trying to do, with the full example code or a
link to a patch? The error you're getting is to do with active global
handles, so the cause for the error really depends on what the rest of your
code is doing.
- Leszek
On Sat, Jun 1, 2024 at 6:43 AM 'Ronald Fenner' via v8-dev <
v8-dev@googlegroups.com> wrote:
> I'm working on code to take a snapshot of v8 isolate and context and while
> I have ogtten snapshotting working with function templates, I'm running
> into a problem with tryingt otest snapshotting a js object wrapped with a
> cpp class.
> When i snapshot the object seems to be getting CGed as the wek ref
> callback gets called and thus the object is deleted and the serializer
> function is never called for it.
>
> Not sure how to keep the obj alive for the snapshot the test js code is
>
> test('test');
> test2('test2');
> let snapObj = new TestSnapObject();
> snapObj.value = 100;
> The object does get created and i can se the value change from the cpp
> side.
>
> How would i need to keep it alive so it gets snapshotted.
>
> Another question if i hold a global the context in a class should i have
> to cleat it for snapshotting? I have tried to hold but get an error where
> as if i clear it will snapshot ok.
> When I hold i get this error
>
> global handle not serialized: 0x1248082824cd: [NativeContext] in OldSpace
> - map: 0x1248082824a5 <Map(NATIVE_CONTEXT_TYPE)>
> - type: NATIVE_CONTEXT_TYPE
> - scope_info: 0x1248080061d5 <ScopeInfo SCRIPT_SCOPE>
> - previous: 0
> - native_context: 0x1248082824cd <NativeContext[287]>
> - extension: 0x1248082936d1 <JSGlobalObject>
> - length: 287
> - elements:
> 0: 0x1248080061d5 <ScopeInfo SCRIPT_SCOPE>
> 1: 0
> 2: 0x1248082936d1 <JSGlobalObject>
> 3: 0x124808282471 <JSGlobalProxy>
> 4: 0x12480820f2a5 <Other heap object (EMBEDDER_DATA_ARRAY_TYPE)>
> 5: 0x124808000069 <undefined>
> 6: 0x12480828d929 <JSFunction next (sfi = 0x1248080f4a31)>
> 7: 0x12480828d945 <JSFunction next (sfi = 0x1248080f4a5d)>
> 8: 0x12480828b099 <JSFunction apply (sfi = 0x1248080fa93d)>
> 9: 0x12480828af49 <JSFunction construct (sfi = 0x1248080fa969)>
> 10: 0x12480828a065 <JSFunction then (sfi = 0x1248080f7161)>
> 11: 0x124808282ce9 <JSFunction apply (sfi = 0x1248080f51c1)>
> 12: 0x124808284519 <JSFunction Uint8Array (sfi = 0x1248080f9c2d)>
> 13: 0x124808284685 <JSFunction Int8Array (sfi = 0x1248080f9c59)>
> 14: 0x124808289771 <JSFunction Uint16Array (sfi =
> 0x1248080f9c85)>
> 15: 0x12480828ad1d <JSFunction Int16Array (sfi = 0x1248080f9cb1)>
> 16: 0x12480828a2d9 <JSFunction Uint32Array (sfi =
> 0x1248080f9cdd)>
> 17: 0x1248082851e1 <JSFunction Int32Array (sfi = 0x1248080f9d09)>
> 18: 0x1248082898dd <JSFunction Float32Array (sfi =
> 0x1248080f9d35)>
> 19: 0x12480828abb1 <JSFunction Float64Array (sfi =
> 0x1248080f9d61)>
> 20: 0x1248082843ad <JSFunction Uint8ClampedArray (sfi =
> 0x1248080f9d8d)>
> 21: 0x124808284aa1 <JSFunction BigUint64Array (sfi =
> 0x1248080f9db9)>
> 22: 0x12480828aa45 <JSFunction BigInt64Array (sfi =
> 0x1248080f9de5)>
> 23: 0x124808000069 <undefined>
> 24: 0x12480828d961 <Map[72](RAB_GSAB_UINT8ELEMENTS)>
> 25: 0x12480828d989 <Map[72](RAB_GSAB_INT8ELEMENTS)>
> 26: 0x12480828d9b1 <Map[72](RAB_GSAB_UINT16ELEMENTS)>
> 27: 0x12480828d9d9 <Map[72](RAB_GSAB_INT16ELEMENTS)>
> 28: 0x12480828da01 <Map[72](RAB_GSAB_UINT32ELEMENTS)>
> 29: 0x12480828da29 <Map[72](RAB_GSAB_INT32ELEMENTS)>
> 30: 0x12480828da51 <Map[72](RAB_GSAB_FLOAT32ELEMENTS)>
> 31: 0x12480828da79 <Map[72](RAB_GSAB_FLOAT64ELEMENTS)>
> 32: 0x12480828daa1 <Map[72](RAB_GSAB_UINT8_CLAMPEDELEMENTS)>
> 33: 0x12480828dac9 <Map[72](RAB_GSAB_BIGUINT64ELEMENTS)>
> 34: 0x12480828daf1 <Map[72](RAB_GSAB_BIGINT64ELEMENTS)>
> 35: 0x124808000069 <undefined>
> 36: 0x12480828db19 <Map[28](HOLEY_ELEMENTS)>
> 37: 0x124808000069 <undefined>
> 38: 0x12480828a861 <JSFunction ArrayBuffer (sfi =
> 0x1248080f9185)>
> 39: 0x12480828a8b1 <Map[68](HOLEY_ELEMENTS)>
> 40: 0x12480828db81 <JSFunction
> arrayBufferConstructor_DoNotInitialize (sfi = 0x1248080f9261)>
> 41: 0x12480828ce75 <JSFunction Array (sfi = 0x1248080f529d)>
> 42-43: 0x124808000069 <undefined>
> 44: 0x12480828db9d <Map[20](HOLEY_ELEMENTS)>
> 45: 0x12480828dd81 <JSFunction AsyncFunction (sfi =
> 0x1248080fad31)>
> 46: 0x12480828de8d <Map[44](HOLEY_ELEMENTS)>
> 47: 0x12480828df1d <JSFunction AsyncGeneratorFunction (sfi =
> 0x1248080facad)>
> 48: 0x124808284c19 <JSFunction BigInt (sfi = 0x1248080fa441)>
> 49: 0x1248082888c5 <JSFunction Boolean (sfi = 0x1248080f5c69)>
> 50: 0x12480828e139 <Map[24](HOLEY_ELEMENTS)>
> 51: 0x12480828e189 <Map[24](HOLEY_ELEMENTS)>
> 52: 0x12480828e1d9 <JSFunction (sfi = 0x1248080fac55)>
> 53: 0x12480828e1f5 <JSFunction (sfi = 0x1248080fac29)>
> 54: 0x12480828e211 <JSFunction CallSite (sfi = 0x1248080fad5d)>
> 55: 0x12480828e6a1 <JSFunction (sfi = 0x12480820df21)>
> 56: 0x12480828e765 <Map[28](HOLEY_ELEMENTS)>
> 57: 0x124808288171 <JSFunction DataView (sfi = 0x1248080f9e11)>
> 58: 0x124808288db9 <JSFunction Date (sfi = 0x1248080f6769)>
> 59: 0x124808000069 <undefined>
> 60: 0x124808282b4d <JSFunction (sfi = 0x124808209569)>
> 61-62: 0x124808000069 <undefined>
> 63: 0
> 64: 0x12480828e829 <Object map = 0x12480828e7cd>
> 65: 0x12480828e87d <Map[20](FAST_SLOPPY_ARGUMENTS_ELEMENTS)>
> 66: 0x12480828e955 <FixedArray[1024]>
> 67: 0x124808282bf1 <JSFunction Function (sfi = 0x1248080f5195)>
> 68: 0x124808282b4d <JSFunction (sfi = 0x124808209569)>
> 69: 0x1248082902b9 <JSFunction GeneratorFunction (sfi =
> 0x1248080fac81)>
> 70: 0x12480829056d <Map[12](HOLEY_ELEMENTS)>
> 71: 0x124808290595 <Map[12](HOLEY_ELEMENTS)>
> 72: 0x1248082905bd <Map[24](HOLEY_ELEMENTS)>
> 73: 0x124808290651 <Object map = 0x1248082905e5>
> 74: 0x12480828d17d <JSArray[0]>
> 75: 0x124808285471 <Object map = 0x1248082853ed>
> 76: 0x1248082904b5 <Object map = 0x1248082903a9>
> 77: 0x12480828dc31 <Object map = 0x12480828dbed>
> 78: 0x12480828e081 <Object map = 0x12480828e00d>
> 79: 0x124808290431 <Object map = 0x1248082903d1>
> 80: 0x124808290715 <Object map = 0x1248082906a9>
> 81: 0x124808284ecd <Map[28](HOLEY_ELEMENTS)>
> 82: 0x12480828336d <Object map = 0x1248082829a9>
> 83: 0x1248082907b9 <Object map = 0x12480829074d>
> 84: 0x124808287fe9 <Object map = 0x124808287edd>
> 85: 0x124808287edd <Map[28](HOLEY_ELEMENTS)>
> 86: 0x1248082907f1 <Map[20](HOLEY_ELEMENTS)>
> 87: 0x124808290885 <Object map = 0x124808290819>
> 88: 0x124808287755 <Object map = 0x1248082874a1 value =
> 0x1248080000a1 <String[0]: #>>
> 89: 0x124808287209 <Map[28](HOLEY_ELEMENTS)>
> 90: 0x124808284905 <Map[28](HOLEY_ELEMENTS)>
> 91: 0x12480828b4b5 <JSFunction Collator (sfi = 0x1248080f8761)>
> 92: 0x12480828c825 <JSFunction DateTimeFormat (sfi =
> 0x1248080f84f9)>
> 93: 0x12480828c465 <JSFunction DisplayNames (sfi =
> 0x1248080f8fa1)>
> 94: 0x124808000069 <undefined>
> 95: 0x12480828b259 <JSFunction NumberFormat (sfi =
> 0x1248080f862d)>
> 96: 0x12480828bf0d <JSFunction Locale (sfi = 0x1248080f8c05)>
> 97: 0x12480828bd19 <JSFunction ListFormat (sfi = 0x1248080f8b29)>
> 98: 0x12480828b919 <JSFunction PluralRules (sfi =
> 0x1248080f8971)>
> 99: 0x12480828bb19 <JSFunction RelativeTimeFormat (sfi =
> 0x1248080f8a4d)>
> 100: 0x12480828c629 <JSFunction Segmenter (sfi = 0x1248080f9051)>
> 101: 0x1248082908dd <Map[28](HOLEY_ELEMENTS)>
> 102: 0x1248082909e5 <Map[28](HOLEY_ELEMENTS)>
> 103-109: 0x124808000069 <undefined>
> 110: 0x124808290ad1 <Map[20](HOLEY_ELEMENTS)>
> 111: 0x12480828cf09 <Map[16](PACKED_SMI_ELEMENTS)>
> 112: 0x12480828d7c9 <Map[16](HOLEY_SMI_ELEMENTS)>
> 113: 0x12480828d889 <Map[16](PACKED_ELEMENTS)>
> 114: 0x12480828d8c9 <Map[16](HOLEY_ELEMENTS)>
> 115: 0x12480828d809 <Map[16](PACKED_DOUBLE_ELEMENTS)>
> 116: 0x12480828d849 <Map[16](HOLEY_DOUBLE_ELEMENTS)>
> 117: 0x124808290b71 <Map[28](PACKED_FROZEN_ELEMENTS)>
> 118: 0x124808284e71 <JSFunction Map (sfi = 0x1248080fa231)>
> 119: 0x124808284ea5 <Map[16](HOLEY_ELEMENTS)>
> 120: 0x124808290bd9 <Map[20](HOLEY_ELEMENTS)>
> 121: 0x124808000069 <undefined>
> 122: 0x124808287e81 <JSFunction Set (sfi = 0x1248080fa549)>
> 123: 0x124808287eb5 <Map[16](HOLEY_ELEMENTS)>
> 124: 0x1248082871ad <JSFunction WeakMap (sfi = 0x1248080fa701)>
> 125: 0x1248082848a9 <JSFunction WeakSet (sfi = 0x1248080fa7dd)>
> 126: 0x12480828870d <JSFunction WeakRef (sfi = 0x1248080fabd1)>
> 127: 0x12480828cab9 <JSFunction FinalizationRegistry (sfi =
> 0x1248080fab21)>
> 128-137: 0x124808000069 <undefined>
> 138: 0x1248082847d9 <Object map = 0x12480828477d>
> 139-142: 0x124808000069 <undefined>
> 143: 0x12480828247d <MetaMap (0x1248082824cd
> <NativeContext[287]>)>
> 144: 0x124808290c1d <Map(FUNCTION_CONTEXT_TYPE)>
> 145: 0x124808290c45 <Map(MODULE_CONTEXT_TYPE)>
> 146: 0x124808290c6d <Map(EVAL_CONTEXT_TYPE)>
> 147: 0x124808290c95 <Map(SCRIPT_CONTEXT_TYPE)>
> 148: 0x124808290cbd <Map(AWAIT_CONTEXT_TYPE)>
> 149: 0x124808290ce5 <Map(BLOCK_CONTEXT_TYPE)>
> 150: 0x124808290d0d <Map(CATCH_CONTEXT_TYPE)>
> 151: 0x124808290d35 <Map(WITH_CONTEXT_TYPE)>
> 152: 0x124808290d5d <Map(DEBUG_EVALUATE_CONTEXT_TYPE)>
> 153: 0x124808290d85 <Map[60](HOLEY_ELEMENTS)>
> 154: 0x124808290dad <Other heap object (WEAK_FIXED_ARRAY_TYPE)>
> 155: 0x124808290fb5 <Map[20](HOLEY_ELEMENTS)>
> 156: 0x124808290ffd <Map[20](HOLEY_ELEMENTS)>
> 157: 0x124808291025 <Map[20](HOLEY_ELEMENTS)>
> 158: 0
> 159: 0x12480829104d <ByteArray[16]>
> 160: 0x124808291065 <FixedDoubleArray[64]>
> 161: 0x12480829126d <Other heap object (WEAK_FIXED_ARRAY_TYPE)>
> 162: 0x12480828a511 <JSFunction Number (sfi = 0x1248080f5a2d)>
> 163: 0x124808282eb1 <JSFunction Object (sfi = 0x1248080f4955)>
> 164: 0x12480828336d <Object map = 0x1248082829a9>
> 165: 0x1248082829a9 <Map[28](HOLEY_ELEMENTS)>
> 166-169: 0x124808000069 <undefined>
> 170: 0x124808291375 <Map[16](JS_PROXY_TYPE)>
> 171: 0x12480829139d <Map[16](JS_PROXY_TYPE)>
> 172: 0x124808289a45 <JSFunction Proxy (sfi = 0x1248080fa88d)>
> 173: 0x1248082913c5 <Map[16](JS_PROXY_TYPE)>
> 174: 0x1248082913ed <Map[20](HOLEY_ELEMENTS)>
> 175: 0x12480828a019 <Object map = 0x124808289f89>
> 176: 0x124808000069 <undefined>
> 177: 0x124808286ec1 <JSFunction exec (sfi = 0x1248080f7211)>
> 178: 0x124808286ae1 <JSFunction RegExp (sfi = 0x1248080f71e5)>
> 179: 0x12480829143d <Other heap object (REG_EXP_MATCH_INFO_TYPE)>
> 180: 0x124808286e51 <JSFunction [Symbol.matchAll] (sfi =
> 0x1248080f7479)>
> 181: 0x124808286e35 <JSFunction [Symbol.match] (sfi =
> 0x1248080f744d)>
> 182: 0x124808286ddd <Object map = 0x124808286b3d>
> 183: 0x124808286b3d <Map[28](HOLEY_ELEMENTS)>
> 184: 0x124808286e6d <JSFunction [Symbol.replace] (sfi =
> 0x1248080f74a5)>
> 185: 0x124808291469 <Map[40](HOLEY_ELEMENTS)>
> 186: 0x1248082914f5 <Map[44](HOLEY_ELEMENTS)>
> 187: 0x12480829158d <Map[20](HOLEY_ELEMENTS)>
> 188: 0x124808286e89 <JSFunction [Symbol.search] (sfi =
> 0x1248080f74d1)>
> 189: 0x124808286ea5 <JSFunction [Symbol.split] (sfi =
> 0x1248080f74fd)>
> 190: 0x1248082915dd <Map[24](HOLEY_ELEMENTS)>
> 191: 0x1248082916c9 <ScriptContextTable[16]>
> 192: 0x124808000069 <undefined>
> 193: 0x12480820f2b5 <String[36]:
> "d34eb7dc-8045-4301-930f-0cc982e1753e">
> 194: 0x1248080006fd <FixedArray[0]>
> 195: 0x124808291851 <Map[20](HOLEY_ELEMENTS)>
> 196: 0x124808291899 <Map[20](HOLEY_ELEMENTS)>
> 197: 0x12480829195d <JSFunction SharedArrayBuffer (sfi =
> 0x1248080f928d)>
> 198: 0x12480828e8c5 <Map[20](PACKED_ELEMENTS)>
> 199: 0x124808291a9d <Map[20](SLOW_SLOPPY_ARGUMENTS_ELEMENTS)>
> 200: 0x124808291af9 <Map[16](PACKED_ELEMENTS)>
> 201: 0x124808291b61 <Map[12](HOLEY_ELEMENTS)>
> 202: 0x124808291b89 <Map[12](HOLEY_ELEMENTS)>
> 203: 0x124808291bb1 <SimpleNumberDictionary[1027]>
> 204: 0x124808292bc5 <OrderedHashSet[13]>
> 205: 0x1248080006fd <FixedArray[0]>
> 206: 0x124808292c01 <PropertyCell name=0x1248080000a1 <String[0]:
> #> value=1>
> 207: 0x124808282c25 <Map[32](HOLEY_ELEMENTS)>
> 208: 0x124808292c15 <Map[36](HOLEY_ELEMENTS)>
> 209: 0x124808292c89 <Map[28](HOLEY_ELEMENTS)>
> 210: 0x12480828fb49 <Map[32](HOLEY_ELEMENTS)>
> 211: 0x124808283505 <Map[32](HOLEY_ELEMENTS)>
> 212: 0x124808292cf1 <Map[36](HOLEY_ELEMENTS)>
> 213: 0x12480828328d <Map[32](HOLEY_ELEMENTS)>
> 214: 0x124808282c99 <Map[28](HOLEY_ELEMENTS)>
> 215: 0x124808292d4d <Map[32](HOLEY_ELEMENTS)>
> 216: 0x12480828ddb5 <Map[28](HOLEY_ELEMENTS)>
> 217: 0x124808292d9d <Map[32](HOLEY_ELEMENTS)>
> 218: 0x1248082902ed <Map[32](HOLEY_ELEMENTS)>
> 219: 0x124808292ded <Map[36](HOLEY_ELEMENTS)>
> 220: 0x12480828df51 <Map[32](HOLEY_ELEMENTS)>
> 221: 0x124808292e49 <Map[36](HOLEY_ELEMENTS)>
> 222: 0x124808292ea5 <Map[32](HOLEY_ELEMENTS)>
> 223: 0x1248082873e5 <JSFunction String (sfi = 0x1248080f5ced)>
> 224: 0x1248082874a1 <Map[16](FAST_STRING_WRAPPER_ELEMENTS)>
> 225: 0x1248082838f9 <JSFunction Symbol (sfi = 0x1248080f6635)>
> 226: 0
> 227: 0x124808293161 <WebAssembly map = 0x124808292ef5>
> 228: 0x124808292c89 <Map[28](HOLEY_ELEMENTS)>
> 229: 0x124808290071 <JSFunction Tag (sfi = 0x12480820e9f5)>
> 230: 0x124808290125 <JSFunction Exception (sfi = 0x12480820eabd)>
> 231: 0x12480828ff45 <JSFunction Global (sfi = 0x12480820e7f1)>
> 232: 0x12480828fbd9 <JSFunction Instance (sfi = 0x12480820e2b5)>
> 233: 0x1248082931b1 <Tag map = 0x124808290091>
> 234: 0x12480828fe35 <JSFunction Memory (sfi = 0x12480820e655)>
> 235: 0x12480828fa49 <JSFunction Module (sfi = 0x12480820e1e9)>
> 236: 0x12480828fcc1 <JSFunction Table (sfi = 0x12480820e3e9)>
> 237-238: 0x124808000069 <undefined>
> 239: 0x124808283be9 <JSFunction TypedArray (sfi = 0x1248080f9579)>
> 240: 0x124808283f61 <Object map = 0x124808283c7d>
> 241: 0x12480828d489 <JSFunction entries (sfi = 0x1248080f5715)>
> 242: 0x12480828d4c1 <JSFunction forEach (sfi = 0x1248080f576d)>
> 243: 0x12480828d46d <JSFunction keys (sfi = 0x1248080f56e9)>
> 244: 0x12480828d4a5 <JSFunction values (sfi = 0x1248080f5741)>
> 245: 0x124808285375 <JSFunction Error (sfi = 0x1248080f7c09)>
> 246: 0x12480828548d <JSFunction toString (sfi = 0x1248080f7c61)>
> 247: 0x124808288bf5 <JSFunction EvalError (sfi = 0x1248080f7cb9)>
> 248: 0x124808286fdd <JSFunction AggregateError (sfi =
> 0x1248080f7c8d)>
> 249: 0x124808289aa5 <JSFunction eval (sfi = 0x1248080fb259)>
> 250: 0x124808286411 <JSFunction parseFloat (sfi = 0x1248080f5c11)>
> 251: 0x12480828882d <JSFunction parseInt (sfi = 0x1248080f5c3d)>
> 252: 0x124808293735 <JSFunction (sfi = 0x124808293709)>
> 253: 0x124808285049 <JSFunction delete (sfi = 0x1248080fa2e1)>
> 254: 0x1248082850f1 <JSFunction get (sfi = 0x1248080fa25d)>
> 255: 0x12480828502d <JSFunction has (sfi = 0x1248080fa2b5)>
> 256: 0x12480828510d <JSFunction set (sfi = 0x1248080fa289)>
> 257: 0x1248082935f1 <JSFunction cleanupSome (sfi =
> 0x1248080faba5)>
> 258: 0x124808282d59 <JSFunction [Symbol.hasInstance] (sfi =
> 0x1248080f5271)>
> 259: 0x124808282d3d <JSFunction toString (sfi = 0x1248080f5245)>
> 260: 0x124808283425 <JSFunction toString (sfi = 0x1248080f50b9)>
> 261: 0x124808283441 <JSFunction valueOf (sfi = 0x1248080f50e5)>
> 262: 0x124808289eb9 <JSFunction all (sfi = 0x1248080f7059)>
> 263: 0x124808289ed5 <JSFunction allSettled (sfi = 0x1248080f7085)>
> 264: 0x124808289ef1 <JSFunction any (sfi = 0x1248080f70b1)>
> 265: 0x124808289e6d <JSFunction Promise (sfi = 0x1248080f7001)>
> 266: 0x12480828a12d <JSFunction RangeError (sfi = 0x1248080f7ce5)>
> 267: 0x124808288a55 <JSFunction ReferenceError (sfi =
> 0x1248080f7d11)>
> 268: 0x1248082880d9 <JSFunction add (sfi = 0x1248080fa5a1)>
> 269: 0x124808288031 <JSFunction delete (sfi = 0x1248080fa5cd)>
> 270: 0x1248082880bd <JSFunction has (sfi = 0x1248080fa575)>
> 271-272: 0x124808000069 <undefined>
> 273: 0x12480828cc7d <JSFunction SyntaxError (sfi =
> 0x1248080f7d3d)>
> 274: 0x124808285bdd <JSFunction TypeError (sfi = 0x1248080f7d69)>
> 275: 0x12480828551d <JSFunction URIError (sfi = 0x1248080f7d95)>
> 276: 0x1248082931dd <JSFunction CompileError (sfi =
> 0x1248080f7dc1)>
> 277: 0x124808293301 <JSFunction LinkError (sfi = 0x1248080f7ded)>
> 278: 0x124808293425 <JSFunction RuntimeError (sfi =
> 0x1248080f7e19)>
> 279: 0x124808287329 <JSFunction set (sfi = 0x1248080fa785)>
> 280: 0x12480828730d <JSFunction get (sfi = 0x1248080fa759)>
> 281: 0x1248082872f1 <JSFunction delete (sfi = 0x1248080fa72d)>
> 282: 0x1248082849fd <JSFunction add (sfi = 0x1248080fa861)>
> 283: 0x124808000069 <undefined>
> 284: 0x12480800070d <Other heap object (WEAK_ARRAY_LIST_TYPE)>
> 285-286: 0x124808000069 <undefined>
> - microtask_queue: 0x138005990
>
> global handle not serialized: 0x12480820f2fd: [[api object] 0] in OldSpace
> - map: 0x124808294315 <Map[28](HOLEY_ELEMENTS)> [FastProperties]
> - prototype: 0x12480820f171 <Object map = 0x124808294381>
> - elements: 0x1248080006fd <FixedArray[0]> [HOLEY_ELEMENTS]
> - embedder fields: 2
> - properties: 0x1248080006fd <FixedArray[0]>
> - All own properties (excluding elements): {
> 0x124808000ddd: [String] in ReadOnlySpace: #value: 0x124808294309
> <AccessorPair> (const accessor descriptor), location: descriptor
> }
> - embedder fields = {
> 45850764, aligned pointer: 0x105774118
> 469786088, aligned pointer: 0x13800bbd0
> }
> Thanks for any pointers
>
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