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July 28, 2015 06:00 pm
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/AQfCVbF_tOw/net-46-optimizer-bug-causes-methods-to-get-wrong-parameters
.NET 4.6 Optimizer Bug Causes Methods To Get Wrong Parameters
tobiasly writes: A serious bug in the just-released .NET 4.6 runtime causes the JIT compiler to generate incorrectly-optimized code which results in methods getting called with different parameters than what were passed in. Nick Craver of Stack Exchange has an excellent write-up of the technical details and temporary workarounds; Microsoft has acknowledged the problem and submitted an as-yet unreleased patch. This problem is compounded by Microsoft's policy of replacing the existing .NET runtime, as opposed to the side-by-side runtimes which were possible until .NET 2.0. This means that even if your project targets .NET 4.5, it will get the 4.6 runtime if it was installed on that machine. Since it's not possible to install the just-released Visual Studio 2015 without .NET 4.6, this means developers must make the difficult choice between using the latest tools or risking crippling bugs such as this one.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/AQfCVbF_tOw/net-46-optimizer-bug-causes-methods-to-get-wrong-parameters
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