bumping swift version number to 5.2 rdar://problem/56622958

CMakeLists.txt

@@ -127,7 +127,7 @@ set(SWIFT_ANALYZE_CODE_COVERAGE FALSE CACHE STRING
 # SWIFT_VERSION is deliberately /not/ cached so that an existing build directory
 # can be reused when a new version of Swift comes out (assuming the user hasn't
 # manually set it as part of their own CMake configuration).
-set(SWIFT_VERSION "5.1.2")
+set(SWIFT_VERSION "5.2")
 
 set(SWIFT_VENDOR "" CACHE STRING
     "The vendor name of the Swift compiler")

test/Serialization/Recovery/types-5-to-4.swift

@@ -16,8 +16,8 @@ import Lib
 func requiresConformance(_: B_RequiresConformance<B_ConformsToProto>) {}
 func requiresConformance(_: B_RequiresConformance<C_RelyOnConformanceImpl.Assoc>) {}
 
-class Sub: Base {} // expected-error {{cannot inherit from class 'Base' (compiled with Swift 5.1.2) because it has overridable members that could not be loaded in Swift 4.1.50}}
-class Impl: Proto {} // expected-error {{type 'Impl' cannot conform to protocol 'Proto' (compiled with Swift 5.1.2) because it has requirements that could not be loaded in Swift 4.1.50}}
+class Sub: Base {} // expected-error {{cannot inherit from class 'Base' (compiled with Swift 5.2) because it has overridable members that could not be loaded in Swift 4.1.50}}
+class Impl: Proto {} // expected-error {{type 'Impl' cannot conform to protocol 'Proto' (compiled with Swift 5.2) because it has requirements that could not be loaded in Swift 4.1.50}}
 
 #else // TEST
 

utils/build_swift/defaults.py

@@ -40,7 +40,7 @@ BUILD_VARIANT = 'Debug'
 CMAKE_GENERATOR = 'Ninja'
 
 COMPILER_VENDOR = 'none'
-SWIFT_USER_VISIBLE_VERSION = CompilerVersion('5.1.2')
+SWIFT_USER_VISIBLE_VERSION = CompilerVersion('5.2')
 CLANG_USER_VISIBLE_VERSION = CompilerVersion('7.0.0')
 SWIFT_ANALYZE_CODE_COVERAGE = 'false'