AddressSanitizer:DEADLYSIGNAL
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==8798==ERROR: AddressSanitizer: SEGV on unknown address 0x62900003a558 (pc 0x55e6f23b18a9 bp 0x7ffd8602ff80 sp 0x7ffd8602fe80 T0)
==8798==The signal is caused by a READ memory access.
    #0 0x55e6f23b18a8 in Dict<BigStr*, BigStr*>::hash_and_probe(BigStr*) const (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x1a8a8)
    #1 0x55e6f23b22e2 in Dict<BigStr*, BigStr*>::find_kv_index(BigStr*) const (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x1b2e2)
    #2 0x55e6f23affc9 in Dict<BigStr*, BigStr*>::at(BigStr*) const (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x18fc9)
    #3 0x55e6f23ad483 in test_classes_gc::run_tests() (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x16483)
    #4 0x55e6f23ad780 in main (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x16780)
    #5 0x7ff7c562409a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    #6 0x55e6f23ac889 in _start (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x15889)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/home/uke/oil/_bin/cxx-asan+gcalways/mycpp/examples/test_classes_gc.mycpp+0x1a8a8) in Dict<BigStr*, BigStr*>::hash_and_probe(BigStr*) const
==8798==ABORTING