[release/9.0-preview7] Fix throwing exception when calling RunClassConstructor on a generic type with a static constructor #105535
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Backport of #105513 to release/9.0-preview7
/cc @steveisok
Customer Impact
Customers who use
RuntimeHelpers.RunClassConstructoron a generic type with a static constructor are currently getting an exception because the runtime was no longer assuming it was already initialized.First reported in #103891, but also failed app compat testing in https://devdiv.visualstudio.com/DevDiv/_workitems/edit/2106458. DevExpress also indicated they were hitting this with their WPF controls.
Regression
#99183 introduced the regression.
Testing
A test was added to invoke the static constructor on a generic type and it did not throw an exception.
Risk
Low - this is a targeted fix
IMPORTANT: If this backport is for a servicing release, please verify that:
The PR target branch is
release/X.0-staging, notrelease/X.0.If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.