Remove Assert in Method.MakeGeneric on Invalid Args #2153
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The call to mono_class_inflate_generic_method_checked will set error
when there are invalid types (e.g. typeof(void)/typeof(int*)) passed
in. This should not be an assert, we should all to the "Invalid
generic arguments" message below. This does loose the error returned
by mono_class_inflate_generic_method_checked but that error isn't user
friendly. It would report be something like:
"MVAR 1 cannot be expanded with type 0x1"
We can just report the more readable error to the user.
Note I also had to remove the "typeArguments" message from the error.
When this error is freed Mono will attempt to deallocate that value, but
since it's not a allocated value our allocator will crash (In Unity we
replace Mono's allocators with our own).
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joncham
approved these changes
Jun 18, 2025
UnityAlex
approved these changes
Jun 18, 2025
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The call to
mono_class_inflate_generic_method_checkedwill set error when there are invalid types (e.g.typeof(void)/typeof(int*))passed in. This should not be an assert, we should all to the "Invalid generic arguments" message below. This does loose the error returned bymono_class_inflate_generic_method_checkedbut that error isn't userfriendly. It would report be something like:
We can just report the more readable error to the user.
Note I also had to remove the
"typeArguments"message from the error. When this error is freed Mono will attempt to deallocate that value, but since it's not a allocated value our allocator will crash (In Unity we replace Mono's allocators with our own).Upstream issue: dotnet/runtime#71339
Upstream PR: dotnet/runtime#116788
Reviewers: please consider these questions as well! ❤️
Release notes
Fixed UUM-109251 @scott-ferguson-unity:
Mono: Prevent crash when Method.MakeGenericMethod is called with invalid generic argument types