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[release/10.0-rc2] Fix ResourceUpdater.Dispose() - #120269
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sbomer
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Backport of #120029 to release/10.0-rc2
The apphost ResourceUpdater doesn't dispose of the PEReader when leaveOpen is true, but the leaveOpen should only apply to the FileStream passed to the constructor. The PEReader is not accessible from the creator and cannot be disposed of elsewhere. This led to some race conditions in the SDK which caused the bundler to later fail to open the apphost.
Context: dotnet/sdk#50784
Customer Impact
Found in SDK tests.
Regression
[If yes, specify when the regression was introduced. Provide the PR or commit if known.]
Testing
There is a unit test to verify the disposal behavior. The race condition appeared in a few sdk tests after updates to host writer.
Risk
Low. This fixes a simple Dispose bug in a codepath that wasn't exercised until recently (no code previously constructed the type with
leaveOpen).IMPORTANT: If this backport is for a servicing release, please verify that:
release/X.0-staging, notrelease/X.0.