Xcodeだと"わいわい"出てくるぞ わいわい Playground execution failed: error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT). The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation. * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x00007fffaba7c64e libobjc.A.dylib`_object_remove_assocations + 24 frame #1: 0x00007fffaba7c603 libobjc.A.dylib`objc_destructInstance + 105 frame #2: 0x000000011048e398 libswiftCore.dylib`swift_deallocClassInstance + 24 frame #3: 0x000000011048e2f0 libswiftCore.dylib`_swift_release_dealloc + 16 frame #4: 0x000000010e437012 PlaygroundLogger`function signature specialization <Arg[0] = Dead> of static PlaygroundLogger.LoggingPolicyStack.get() -> PlaygroundLogger.LoggingPolicyStack + 162 frame #5: 0x000000010e430f22 PlaygroundLogger`function signature specialization <Arg[1] = Owned To Guaranteed and Exploded> of playground_log_hidden + 98 frame #6: 0x000000010e43065b PlaygroundLogger`playground_log_hidden + 27 frame #7: 0x000000010e4680af $__lldb_expr160`Never.init(nilLiteral=() @ scalar) at MyPlayground.playground:4
