swift234

[swiftc] Add test case for crash triggered in swift::TypeChecker::checkGenericArguments(swift::DeclContext*, swift::SourceLoc, swift::SourceLoc, swift::Type, swift::GenericSignature*, llvm::ArrayRef<swift::Type>)

Stack trace:

```
swift: /path/to/llvm/include/llvm/ADT/ArrayRef.h:186: const T &llvm::ArrayRef<swift::Type>::operator[](size_t) const [T = swift::Type]: Assertion `Index < Length && "Invalid index!"' failed.
8  swift           0x0000000000e3b83b swift::TypeChecker::checkGenericArguments(swift::DeclContext*, swift::SourceLoc, swift::SourceLoc, swift::Type, swift::GenericSignature*, llvm::ArrayRef<swift::Type>) + 1371
9  swift           0x0000000000e66a1d swift::TypeChecker::applyUnboundGenericArguments(swift::UnboundGenericType*, swift::SourceLoc, swift::DeclContext*, llvm::MutableArrayRef<swift::TypeLoc>, bool, swift::GenericTypeResolver*) + 589
10 swift           0x0000000000e66680 swift::TypeChecker::applyGenericArguments(swift::Type, swift::SourceLoc, swift::DeclContext*, swift::GenericIdentTypeRepr*, bool, swift::GenericTypeResolver*) + 448
14 swift           0x0000000000e66bde swift::TypeChecker::resolveIdentifierType(swift::DeclContext*, swift::IdentTypeRepr*, swift::OptionSet<swift::TypeResolutionFlags, unsigned int>, bool, swift::GenericTypeResolver*, llvm::function_ref<bool (swift::TypeCheckRequest)>*) + 158
16 swift           0x0000000000e67b14 swift::TypeChecker::resolveType(swift::TypeRepr*, swift::DeclContext*, swift::OptionSet<swift::TypeResolutionFlags, unsigned int>, swift::GenericTypeResolver*, llvm::function_ref<bool (swift::TypeCheckRequest)>*) + 164
17 swift           0x0000000000e66aea swift::TypeChecker::validateType(swift::TypeLoc&, swift::DeclContext*, swift::OptionSet<swift::TypeResolutionFlags, unsigned int>, swift::GenericTypeResolver*, llvm::function_ref<bool (swift::TypeCheckRequest)>*) + 42
18 swift           0x0000000000e1447a swift::TypeChecker::checkInheritanceClause(swift::Decl*, swift::GenericTypeResolver*) + 4890
19 swift           0x0000000000e169d9 swift::TypeChecker::validateDecl(swift::ValueDecl*, bool) + 1833
20 swift           0x0000000000fc702a swift::ProtocolDecl::existentialTypeSupportedSlow(swift::LazyResolver*) + 186
26 swift           0x0000000001026074 swift::Type::walk(swift::TypeWalker&) const + 52
27 swift           0x00000000010159cf swift::Type::findIf(std::function<bool (swift::Type)> const&) const + 31
28 swift           0x0000000000e6c82c swift::TypeChecker::checkUnsupportedProtocolType(swift::Decl*) + 380
30 swift           0x0000000000e1bb96 swift::TypeChecker::typeCheckDecl(swift::Decl*, bool) + 150
31 swift           0x0000000000e72cf3 swift::convertStoredVarInProtocolToComputed(swift::VarDecl*, swift::TypeChecker&) + 115
38 swift           0x0000000000e1bb96 swift::TypeChecker::typeCheckDecl(swift::Decl*, bool) + 150
41 swift           0x0000000000e623fa swift::TypeChecker::typeCheckClosureBody(swift::ClosureExpr*) + 218
42 swift           0x0000000000e8c2cc swift::constraints::ConstraintSystem::applySolution(swift::constraints::Solution&, swift::Expr*, swift::Type, bool, bool, bool) + 812
43 swift           0x0000000000e00fdb swift::TypeChecker::typeCheckExpression(swift::Expr*&, swift::DeclContext*, swift::Type, swift::ContextualTypePurpose, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::ExprTypeCheckListener*) + 683
45 swift           0x0000000000e62546 swift::TypeChecker::typeCheckTopLevelCodeDecl(swift::TopLevelCodeDecl*) + 134
46 swift           0x0000000000de81ed swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int) + 1581
47 swift           0x0000000000c9f9b2 swift::CompilerInstance::performSema() + 2946
49 swift           0x0000000000764ccf frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2463
50 swift           0x000000000075f8d5 main + 2741
Stack dump:
0.	Program arguments: /path/to/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift -frontend -c -primary-file validation-test/compiler_crashers/28205-swift-typechecker-checkgenericarguments.swift -target x86_64-unknown-linux-gnu -disable-objc-interop -module-name main -o /tmp/28205-swift-typechecker-checkgenericarguments-4bb34e.o
1.	While type-checking expression at [validation-test/compiler_crashers/28205-swift-typechecker-checkgenericarguments.swift:9:2 - line:170:11] RangeText="print{{
<I
<{var d {
2.	While type-checking 'X' at validation-test/compiler_crashers/28205-swift-typechecker-checkgenericarguments.swift:11:3
3.	While type-checking getter for h at validation-test/compiler_crashers/28205-swift-typechecker-checkgenericarguments.swift:49:5
4.	While resolving type B<T> at [validation-test/compiler_crashers/28205-swift-typechecker-checkgenericarguments.swift:18:12 - line:18:15] RangeText="B<T>"
<unknown>:0: error: unable to execute command: Aborted
<unknown>:0: error: compile command failed due to signal (use -v to see invocation)
```