Backport reflection thread safety from 2.11 to 2.10

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Reflection (e.g. using TypeTag) is not thread safe in Scala 2.10.x (see #6240). A fix has been released for Scala 2.11.0.

It has been suggested that this fix could be backported to 2.10.

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Imported From: https://issues.scala-lang.org/browse/SI-8532?orig=1
Reporter: Carol Alexandru (shapeshifter)
Affected Versions: 2.10.4

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@xeno-by said:
How much of a blocker is this to you?

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Carol Alexandru (shapeshifter) said:
Some of the computationally intensive things in my code run in parallel and use reflection. I can't really seem to find a way around using reflection and I'm stuck with Scala 2.10 for the moment. I'm investigating how soon my dependencies can upgrade to 2.11, but until then, it's a problem. In #6240, others have wished for a back port but I'm not sure if the demand still exists.

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Carol Alexandru (shapeshifter) said:
I was in fact able to update the dependency so it works with 2.11. I don't need the backport anymore. If nobody else thinks it is necessary, this issue can be closed.

Apologies for the noise.

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@xeno-by said:
Great news! Though I think let's keep this issue open.

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@adriaanm said:
2.10.x is now in maintenance mode, so I'm going to close this. We'd consider reviewing PRs that backport features when the risk of regression is low, but otherwise, 2.11 is your best bet. Glad you were able to upgrade!