main: don't mutate compile options in Test#5468
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eliasnaur
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| optionsCopy := *options | ||
| options = &optionsCopy |
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This fix works, but leaves the footgun. If it weren't for its size, compileopts.Options should be passed by value.
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It probably wouldn't be a big deal to just make it a value arg; either way it's going to get copied...
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This function modifies TestConfig, but Test is called from multiple places, so can cause a data race. (and in the presence of races, all behavior bets are off).