Skip to content

[wasm][AOT] null function or function signature mismatch - #119143

Closed
#131049
Closed
[wasm][AOT] null function or function signature mismatch -#119143
#131049
Assignees
pavelsavara
Labels
arch-wasmWebAssembly architecturearea-Codegen-AOT-monodisabled-testThe test is disabled in source code against the issueos-browserBrowser variant of arch-wasmwasm-aot-testWebAssembly AOT Test
Milestone
Future

Description

@pavelsavara
pavelsavara
opened on Aug 27, 2025

Simplest repro is AOT build of

Activator.CreateInstance(typeof(Queue), new[] { new List<Nullable<Int128>>(){0,null} });

Originally from NumberHandlingTestsDynamic.Number_AsCollectionElement_RoundTrip

runtime/src/libraries/System.Text.Json/tests/Common/NumberHandlingTests.cs

Lines 581 to 582 in 0be1d88

obj = Activator.CreateInstance(type, new[] { list });
serialized = await Serializer.SerializeWrapper(obj, s_optionReadAndWriteFromStr);

Log

[21:25:54] fail: MONO_WASM: null function or function signature mismatch
                 RuntimeError: null function or function signature mismatch
                     at aot_instances_aot_wrapper_gsharedvt_out_sig_obj_cl4c_Mono_dValueTuple_602_3cbyte_2c_20Mono_dValueTuple_602_3clong_2c_20long_3e_3e_ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[64734]:0x12547d4)
                     at corlib_System_Collections_Generic_List_1_Enumerator_T_GSHAREDVT_System_Collections_IEnumerator_get_Current (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[41067]:0xa76714)
                     at ut_corlib_System_Collections_Generic_List_1_Enumerator_T_GSHAREDVT_System_Collections_IEnumerator_get_Current (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[41068]:0xa76763)
                     at System_Collections_NonGeneric_System_Collections_Queue__ctor_System_Collections_ICollection (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[10716]:0x36f692)
                     at JsonSchema_Net_aot_wrapper_gsharedvt_out_sig_void_this_obj (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[1405]:0xe20e9)
                     at jit_call_cb (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90080]:0x187fb43)
                     at mono_llvm_cpp_catch_exception (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[93365]:0x1972bf1)
                     at mono_llvm_catch_exception (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[93417]:0x1977254)
                     at do_jit_call (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90000]:0x187c659)
                     at mono_interp_exec_method (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[89995]:0x187bb1a)
                     at interp_entry (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90074]:0x187f7cc)
                     at interp_entry_static_ret_2 (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90103]:0x1880733)
                     at aot_instances_aot_wrapper_gsharedvt_in_sig_obj_objcl40_Mono_dValueTuple_601_3cMono_dValueTuple_602_3cint_2c_20int_3e_3e_ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[64696]:0x1252fd9)
                     at corlib_wrapper_delegate_invoke__Module_invoke_object_object_Span_1_object_object_System_Span_1_object (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[41567]:0xa9241f)
                     at corlib_System_Reflection_MethodBaseInvoker_InvokeWithOneArg_object_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[36414]:0x95b605)
                     at corlib_System_Reflection_RuntimeConstructorInfo_Invoke_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[36560]:0x963d60)
                     at corlib_System_RuntimeType_CreateInstanceImpl_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[25239]:0x794d42)
                     at corlib_System_Activator_CreateInstance_System_Type_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo_object__ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[25970]:0x7b916a)
                     at corlib_System_Activator_CreateInstance_System_Type_object__ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[25971]:0x7b91af)
                     at aot_instances_aot_wrapper_gsharedvt_out_sig_obj_objobj (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[64654]:0x1252284)
                     at jit_call_cb (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90080]:0x187fb5b)
                     at mono_llvm_cpp_catch_exception (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[93365]:0x1972bf1)
                     at mono_llvm_catch_exception (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[93417]:0x1977254)
                     at do_jit_call (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90000]:0x187c659)
                     at mono_interp_exec_method (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[89995]:0x186f460)
                     at interp_entry (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90074]:0x187f7cc)
                     at interp_entry_instance_0 (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[90092]:0x188030a)
                     at aot_instances_aot_wrapper_gsharedvt_in_sig_void_this_ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[64620]:0x12503b0)
                     at corlib_System_Runtime_CompilerServices_AsyncMethodBuilderCore_Start_TStateMachine_GSHAREDVT_TStateMachine_GSHAREDVT_ (http://127.0.0.1:44947/_framework/dotnet.native.wasm:wasm-function[40516]:0xa5f42d)

#66220 may be related

Activity

  1. pavelsavara
    added this to the 11.0.0 milestone on Aug 27, 2025
  2. pavelsavara
    self-assigned this
    on Aug 27, 2025
  3. pavelsavara
    added
    arch-wasmWebAssembly architecture
    wasm-aot-testWebAssembly AOT Test
    os-browserBrowser variant of arch-wasm
    on Aug 27, 2025

  4. dotnet-policy-service commented on Aug 27, 2025

    @dotnet-policy-service
    dotnet-policy-servicebot
    on Aug 27, 2025 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to 'arch-wasm': @lewing
    See info in area-owners.md if you want to be subscribed.

  5. github-actions
    added
    needs-area-labelAn area label is needed to ensure this gets routed to the appropriate area owners
    on Aug 27, 2025
  6. pavelsavara
    added
    area-Codegen-AOT-mono
    and removed
    needs-area-labelAn area label is needed to ensure this gets routed to the appropriate area owners
    on Aug 27, 2025

  7. pavelsavara commented on Aug 27, 2025

    @pavelsavara
    pavelsavara
    on Aug 27, 2025
    MemberAuthor
    [MONO] AOT: FOUND method System.RuntimeType:GetConstructors (System.Reflection.BindingFlags) [0x1276 - 0x1277 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Buffer:Memmove<T> (T&,T&,uintptr) [0x1169 - 0x116a 0x106f98]
dotnet.runtime.js:1415 [MONO] Running class .cctor for System.Collections.Generic.List`1<System.Reflection.MethodBase> from 'System.Private.CoreLib.dll'
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1:.cctor () [0x3832 - 0x3833 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.RuntimeType:IsArrayImpl () [0x12f2 - 0x12f3 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.DefaultBinder:BindToMethod (System.Reflection.BindingFlags,System.Reflection.MethodBase[],object[]&,System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,string[],object&) [0x1762 - 0x1763 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Array:Clone () [0x114e - 0x114f 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.RuntimeType:IsPrimitiveImpl () [0x12f6 - 0x12f7 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.RuntimeType:GetTypeCodeImpl () [0x12f0 - 0x12f1 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Reflection.RuntimeConstructorInfo:Invoke (System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) [0x2f2b - 0x2f2c 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.RuntimeType:IsInstanceOfType (object) [0x1280 - 0x1281 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1<T_GSHAREDVT>:get_Count () [0x3a43 - 0x3a44 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1<T_GSHAREDVT>:System.Collections.IEnumerable.GetEnumerator () [0x3a4a - 0x3a4b 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT NOT FOUND: System.Collections.Generic.List`1<System.Nullable`1<System.Int128>>:System.Collections.Generic.IEnumerable<T>.GetEnumerator ().
dotnet.runtime.js:1415 [MONO] AOT: FOUND method (wrapper other) object:gsharedvt_in_sig (intptr) [0x508d - 0x508e 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT NOT FOUND: System.Collections.Generic.List`1<System.Nullable`1<System.Int128>>:GetEnumerator ().
dotnet.runtime.js:1415 [MONO] AOT: FOUND method (wrapper other) object:gsharedvt_out_sig (intptr,intptr) [0x5053 - 0x5054 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1/Enumerator<T_GSHAREDVT>:.ctor (System.Collections.Generic.List`1<T_GSHAREDVT>) [0x3a50 - 0x3a51 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method string:bzero (byte*,int) [0x1338 - 0x1339 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1/Enumerator<T_GSHAREDVT>:MoveNext () [0x3a52 - 0x3a53 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method string:memcpy (byte*,byte*,int) [0x1337 - 0x1338 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT: FOUND method System.Collections.Generic.List`1/Enumerator<T_GSHAREDVT>:System.Collections.IEnumerator.get_Current () [0x3a53 - 0x3a54 0x106f98]
dotnet.runtime.js:1415 [MONO] AOT NOT FOUND: System.Nullable`1<System.Int128>:Box (System.Nullable`1<System.Int128>).
dotnet.runtime.js:1415 [MONO] AOT NOT FOUND: (wrapper other) object:gsharedvt_out_sig (intptr,Mono.ValueTuple`2<byte, Mono.ValueTuple`2<long, long>>&,intptr).

  8. pavelsavara commented on Aug 27, 2025

    @pavelsavara
    pavelsavara
    on Aug 27, 2025
    MemberAuthor
    $mini_get_gsharedvt_wrapper	@	mini-generic-sharing.c:2114
$mini_llvmonly_add_method_wrappers	@	llvmonly-runtime.c:213
$class_type_info	@	mini-generic-sharing.c:1082
$instantiate_info	@	mini-generic-sharing.c:2244
$instantiate_info	@	mini-generic-sharing.c:2661
$mini_instantiate_gshared_info	@	mini-generic-sharing.c:2760
$mini_init_method_rgctx	@	jit-icalls.c:1743
$corlib_System_Collections_Generic_List_1_Enumerator_T_GSHAREDVT_System_Collections_IEnumerator_get_Current
$ut_corlib_System_Collections_Generic_List_1_Enumerator_T_GSHAREDVT_System_Collections_IEnumerator_get_Current
$System_Collections_NonGeneric_System_Collections_Queue__ctor_System_Collections_ICollection
  9. pavelsavara
    added a commit that references this issue on Aug 27, 2025

    active issue dotnet#119143

    5e3e42e

  10. pavelsavara commented on Aug 27, 2025

    @pavelsavara
    pavelsavara
    on Aug 27, 2025
    MemberAuthor

    I though that this is because AOT doesn't have visibility for the call, because we use reflection to call the constructor.

    So I prefixed it direct call, to make sure it's not trimmed and it's AOT generated. But it didn't help.

    var q = new Queue(new List<Nullable<Int128>>() { 42, null });

    This doesn't reproduce it either.

    List<Nullable<Int128>> n = new List<Nullable<Int128>>() { 42, null };
foreach (object item in n)
{
}

    Right now I think we need something like code below, but for combination of generic and non-generic collections/enumerables.

    runtime/src/mono/mono/mini/aot-compiler.c

    Lines 5824 to 5828 in 0be1d88

    if (in_corlib && !strcmp (klass_name_space, "System.Collections.Generic") &&
    (!strcmp(klass_name, "ICollection`1") || !strcmp (klass_name, "IEnumerable`1") || !strcmp (klass_name, "IList`1") || !strcmp (klass_name, "IEnumerator`1") || !strcmp (klass_name, "IReadOnlyList`1"))) {
    MonoClass *tclass = mono_class_from_mono_type_internal (mono_class_get_generic_class (klass)->context.class_inst->type_argv [0]);
    MonoClass *array_class = mono_class_create_bounded_array (tclass, 1, FALSE);
    char *name_prefix;

  11. pavelsavara
    added
    disabled-testThe test is disabled in source code against the issue
    on Aug 28, 2025
  12. pavelsavara
    modified the milestones: 11.0.0, Future on Sep 17, 2025
  13. lewing
    added 2 commits that reference this issue on Jul 20, 2026

    Re-enable the #119143 browser regression test

    8a6e7f7

    [mono][wasm][AOT] Generate gsharedvt out-sig wrappers for Nullable<T>…

    7ffec08
  14. lewing
    closed this as completedin #131049on Jul 23, 2026
  15. hez2010
    added a commit that references this issue on Jul 26, 2026

    [mono][wasm][AOT] Generate gsharedvt out-sig wrappers for Nullable<T>…

    d756731
  16. github-actions
    locked and limited conversation to collaborators on Aug 23, 2026
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

Labels

arch-wasmWebAssembly architecturearea-Codegen-AOT-monodisabled-testThe test is disabled in source code against the issueos-browserBrowser variant of arch-wasmwasm-aot-testWebAssembly AOT Test

Type

No type

Projects

No projects

    Milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions