Compiler crashers: Sync with https://github.com/practicalswift/swift-compiler-crashes

[practicalswift]

Add 342 compiler crashes.

[gribozavr]

Thanks! I'll run tests on Linux and OS X and merge.

[radex]

@practicalswift FWIW I think there are a bunch more test cases from swift-compiler-crashes that didn't get synced — I can't, for example, find this one: https://github.com/practicalswift/swift-compiler-crashes/blob/736d5c8bee75f676ff3750e4ad3165d81059fe03/crashes/26296-duplicate-subscript-declaration.swift

[gribozavr]

These tests don't crash on Linux and OS X, please move them to the directory for fixed crashers:

Failing Tests (4):
    Swift :: compiler_crashers/27818-swift-astvisitor.swift
    Swift :: compiler_crashers/28181-llvm-irbuilder.swift
    Swift :: compiler_crashers/28182-anonymous-namespace-favorcalloverloads.swift
    Swift :: compiler_crashers/28183-swift-typebase-isequal.swift

[stefanstefan2001]

I know this isn't the best place to ask. How do you run the test ?

[gribozavr]

@stefanstefan2001 utils/build-script -RT. More information in https://github.com/apple/swift/blob/master/docs/Testing.rst.

[stefanstefan2001]

@gribozavr Thank you.

[practicalswift]

@gribozavr Let me know if any further adjustments are needed :-)

[jtbandes]

I think it's quite possible that my PRs #253, #266, and #272 will fix some of these, so might want to wait for them to be merged, then re-run the tests. (Or I could rebase, but I'd have to do it 3 times 😳)

[lattner]

Nice! Thank you @practicalswift , you continue to be awesome!

[gribozavr]

@practicalswift One more thing: these two tests are actually valid programs, so they don't need not in their RUN line:

Failing Tests (2):
    Swift :: compiler_crashers_fixed/27818-swift-astvisitor.swift
    Swift :: compiler_crashers_fixed/28181-llvm-irbuilder.swift

[practicalswift]

@gribozavr Fixed! Sorry about this - still trying to grasp all aspects of the RUN annotations used in the project :-)

[practicalswift]

@radex Thanks for notifying! Your test case 26296-duplicate-subscript-declaration.swift is added as part of #294 :-)

[radex]

:)