IPv6 bootstrap string triggers ASAN check

cbc get -U couchbase://::1/default?ipv6=allow foo

Heap-buffer-overflow on address 0x602000018535 at pc 0x00000045351d bp 0x7ffd83d06a10 sp 0x7ffd83d061d8

READ of size 6 at 0x602000018535 thread T0

  at 0x45351c strlen

  at 0x7fa9482dd762 replace_hoststr (vbucket.c:786)

  at 0x7fa9482dd47d lcbvb_replace_host (vbucket.c:824)

  at 0x7fa948384e2c CccpProvider::update(char const*, char const*) (bc_cccp.cc:226)

  at 0x7fa948386fce CccpProvider::on_io_read() (bc_cccp.cc:431)

  at 0x7fa948387d90 io_read_handler(lcbio_CTX*, unsigned int) (bc_cccp.cc:378)

  at 0x7fa948330ffd invoke_read_cb(lcbio_CTX*, unsigned int) (ctx.cc:251)

  at 0x7fa9483304dd E_handler(int, short, void*) (ctx.cc:278)

  at 0x7fa9482cea42 run_loop (plugin-select.c:309)

  at 0x7fa9482ccf6f sel_run_loop (plugin-select.c:318)

  at 0x7fa9485fa5e7 lcb_wait (wait.cc:108)

  at 0x58ff2b cbc::Handler::run() (cbc.cc:764)

  at 0x5906f8 cbc::GetHandler::run() (cbc.cc:810)

  at 0x58f8db cbc::Handler::execute(int, char**) (cbc.cc:737)

  at 0x5b7707 main (cbc.cc:2547)

  at 0x7fa947649b49 __libc_start_call_main

  at 0x7fa947649c0a __libc_start_main@GLIBC_2.2.5

  at 0x43cb84 _start

Allocated by thread T0 here:

  at 0x4d790c __interceptor_calloc

  at 0x7fa9482dd1af lcbvb_replace_host (vbucket.c:807)

  at 0x7fa948384e2c CccpProvider::update(char const*, char const*) (bc_cccp.cc:226)

  at 0x7fa948386fce CccpProvider::on_io_read() (bc_cccp.cc:431)

  at 0x7fa948387d90 io_read_handler(lcbio_CTX*, unsigned int) (bc_cccp.cc:378)

  at 0x7fa948330ffd invoke_read_cb(lcbio_CTX*, unsigned int) (ctx.cc:251)

  at 0x7fa9483304dd E_handler(int, short, void*) (ctx.cc:278)

  at 0x7fa9482cea42 run_loop (plugin-select.c:309)

  at 0x7fa9482ccf6f sel_run_loop (plugin-select.c:318)

  at 0x7fa9485fa5e7 lcb_wait (wait.cc:108)

  at 0x58ff2b cbc::Handler::run() (cbc.cc:764)

  at 0x5906f8 cbc::GetHandler::run() (cbc.cc:810)

  at 0x58f8db cbc::Handler::execute(int, char**) (cbc.cc:737)

  at 0x5b7707 main (cbc.cc:2547)

  at 0x7fa947649b49 __libc_start_call_main

  at 0x7fa947649c0a __libc_start_main@GLIBC_2.2.5

  at 0x43cb84 _start