ERROR: AddressSanitizer: stack-use-after-return on address

xcodebuild test -project CouchbaseLite.xcodeproj -scheme "CBL_ObjC" -configuration Debug -sdk macosx -only-testing:CBL_ObjC_Tests/ArrayTest/testAddMethodsIndividually

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==71695==ERROR: AddressSanitizer: stack-use-after-return on address 0x00010fca4458 at pc 0x00010b785a7a bp 0x7ffee44ab440 sp 0x7ffee44aac00

READ of size 62 at 0x00010fca4458 thread T0

    #0 0x10b785a79 in wrap_memmove+0x169 (libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x1da79)

    #1 0x7fff6ce32c1f in std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(char const*, unsigned long)+0x61 (libc++.1.dylib:x86_64+0x37c1f)

    #2 0x11828bab6 in std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string<fleece::slice, void>(fleece::slice const&) string:1997

    #3 0x1182674dc in std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string<fleece::slice, void>(fleece::slice const&) string:1995

    #4 0x116bf7819 in ensureConfigDirExists(C4DatabaseConfig2 const*, C4Error*) c4Database.cc:69

    #5 0x116bf6fb6 in c4db_openNamed c4Database.cc:116

    #6 0x11678697f in -[CBLDatabase open:] CBLDatabase.mm:777

    #7 0x11676f545 in -[CBLDatabase initWithName:config:error:] CBLDatabase.mm:114

    #8 0x115d149b7 in -[CBLTestCase openDBNamed:error:] CBLTestCase.m:112

    #9 0x115d1507d in -[CBLTestCase openDB] CBLTestCase.m:118

    #10 0x115d122d9 in -[CBLTestCase setUp] CBLTestCase.m:55