Upgrade to upstream WebKit 23b0720b40

.wkdev-sdk-version

@@ -1 +1 @@
-2.55-v1-a95eaf2
+2.55-v3-a507ffd

CLAUDE.md

@@ -158,7 +158,7 @@ Custom event loop implementation for Bun's runtime requirements
 ```
 
 ### When a test fails, and after an upstream sync
-`JSTests/`, `LayoutTests/js` and the PerformanceTests collections are upstream's tests, and this fork has changed 121 of them. `JSTests/BUN-TEST-DIFFERENCES.md` lists every one by reason: the behaviors the fork has on purpose (with the fork code behind each and the files whose expectations follow it), the tests narrowed to the modes or builds they can pass in, and the ones skipped with `TODO(bun)` for a known gap. Read it before changing a test's expectation or skipping one: a failure that matches an entry there means the test is what to change; one that matches none is a regression in the engine. Its last section is the procedure for sorting a new failure. When a test is changed, add it to that file, and put a `// Bun:` or `// TODO(bun):` comment on the changed line saying what upstream expects. `JSTests/CLAUDE.md` and `JSTests/README.md` are upstream's files: leave them as they are.
+`JSTests/`, `LayoutTests/js` and the PerformanceTests collections are upstream's tests, and this fork has changed 122 of them. `JSTests/BUN-TEST-DIFFERENCES.md` lists every one by reason: the behaviors the fork has on purpose (with the fork code behind each and the files whose expectations follow it), the tests narrowed to the modes or builds they can pass in, and the ones skipped with `TODO(bun)` for a known gap. Read it before changing a test's expectation or skipping one: a failure that matches an entry there means the test is what to change; one that matches none is a regression in the engine. Its last section is the procedure for sorting a new failure. When a test is changed, add it to that file, and put a `// Bun:` or `// TODO(bun):` comment on the changed line saying what upstream expects. `JSTests/CLAUDE.md` and `JSTests/README.md` are upstream's files: leave them as they are.
 
 ## Development Tips
 

Configurations/CommonBase.xcconfig

@@ -133,7 +133,7 @@ SWIFT_OPTIMIZATION_LEVEL[config=Debug] = -Onone;
 WK_SWIFT_MEMORY_SAFETY_FLAGS = -strict-memory-safety -enable-experimental-feature Lifetimes -enable-experimental-feature LifetimeDependence -enable-experimental-feature ImportNonPublicCxxMembers;
 
 // Treat memory safety warnings as errors.
-WK_SWIFT_MEMORY_SAFETY_ERROR_FLAGS = -Werror StrictMemorySafety -Werror ForeignReferenceType;
+WK_SWIFT_MEMORY_SAFETY_ERROR_FLAGS = -Werror StrictMemorySafety -Werror ForeignReferenceType -Werror RegionIsolation;
 // rdar://164903024: Work around false positives in some SDK versions.
 WK_SWIFT_MEMORY_SAFETY_ERROR_FLAGS[sdk=*26.3*] = ;
 
@@ -144,6 +144,7 @@ WK_SWIFT_CLANG_DEPLOYMENT_TARGET = $(WK_SWIFT_CLANG_DEPLOYMENT_TARGET_$(WK_PLATF
 WK_SWIFT_CLANG_DEPLOYMENT_TARGET_macosx = -clang-target $(CURRENT_ARCH)-apple-macos$(MACOSX_DEPLOYMENT_TARGET);
 
 // rdar://170129992: remove -track-system-dependencies when resolved
-OTHER_SWIFT_FLAGS = $(inherited) $(WK_AVAILABILITY_OVERLAY_SWIFT_FLAGS) -Xcc -fvisibility=hidden -Werror ExistentialAny -Werror NoUseUnstructuredThrowingTask -Werror NoUsage -enable-upcoming-feature ExistentialAny $(WK_SWIFT_MEMORY_SAFETY_FLAGS) $(WK_SWIFT_MEMORY_SAFETY_ERROR_FLAGS) $(WK_SWIFT_CLANG_DEPLOYMENT_TARGET) $(WK_SANITIZER_OTHER_SWIFT_FLAGS) -enable-upcoming-feature InternalImportsByDefault -enable-upcoming-feature MemberImportVisibility -track-system-dependencies -enable-experimental-feature ImportCxxMembersLazily -enable-experimental-feature SuppressedAssociatedTypes -enable-experimental-feature SuppressedAssociatedTypesWithDefaults -enable-experimental-feature ForeignReferenceTypeInheritance;
+// FIXME(rdar://189511928, rdar://189512247): remove -disable-round-trip-debug-types when both are resolved
+OTHER_SWIFT_FLAGS = $(inherited) $(WK_AVAILABILITY_OVERLAY_SWIFT_FLAGS) -Xcc -fvisibility=hidden -Werror ExistentialAny -Werror NoUseUnstructuredThrowingTask -Werror NoUsage -enable-upcoming-feature ExistentialAny $(WK_SWIFT_MEMORY_SAFETY_FLAGS) $(WK_SWIFT_MEMORY_SAFETY_ERROR_FLAGS) $(WK_SWIFT_CLANG_DEPLOYMENT_TARGET) $(WK_SANITIZER_OTHER_SWIFT_FLAGS) -enable-upcoming-feature InternalImportsByDefault -enable-upcoming-feature MemberImportVisibility -track-system-dependencies -enable-experimental-feature ImportCxxMembersLazily -enable-experimental-feature SuppressedAssociatedTypes -enable-experimental-feature SuppressedAssociatedTypesWithDefaults -enable-experimental-feature ForeignReferenceTypeInheritance -Xfrontend -disable-round-trip-debug-types -enable-experimental-feature SafeInteropWrappers;
 
 OTHER_LIBTOOLFLAGS = -no_warning_for_no_symbols;