hs: rend_client_send_introduction v0 string truncation warning
x86_64-w64-mingw32-gcc -DHAVE_CONFIG_H -I. -I.. -I../src/ext -Isrc/ext -I../src/ext/trunnel -I../src/trunnel -I../src/common -Isrc/common -I../src/ext/trunnel -I../src/trunnel -I../src/or -Isrc/or -DSHARE_DATADIR="\"/mingw64/share\"" -DLOCALSTATEDIR="\"/mingw64/var\"" -DBINDIR="\"/mingw64/bin\"" -I../src -I../src/common -I/c/OpenSSL-Win64/include -IC:/msys64/mingw64/include -g -O2 -fasynchronous-unwind-tables -Wall -fno-strict-aliasing -Waddress -Warray-bounds -Wdate-time -Wdouble-promotion -Wduplicate-decl-specifier -Wduplicated-cond -Wextra -Wfloat-conversion -Wignored-attributes -Wimplicit-fallthrough -Winit-self -Wlogical-op -Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn -Wnormalized=nfkc -Wnull-dereference -Woverlength-strings -Woverride-init -Wshadow -Wshift-count-negative -Wshift-count-overflow -Wshift-negative-value -Wshift-overflow=2 -Wsizeof-array-argument -Wstrict-overflow=1 -Wsuggest-attribute=format -Wsuggest-attribute=noreturn -Wswitch-bool -Wsync-nand -Wtrampolines -Wunused-but-set-parameter -Wunused-but-set-variable -Wunused-const-variable=2 -Wunused-local-typedefs -Wvariadic-macros -W -Wfloat-equal -Wundef -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2 -Wwrite-strings -Wnested-externs -Wbad-function-cast -Wswitch-enum -Waggregate-return -Wpacked -Wunused -Wunused-parameter -Wold-style-definition -Wmissing-declarations -Werror -MT src/or/rendclient.o -MD -MP -MF $depbase.Tpo -c -o src/or/rendclient.o ../src/or/rendclient.c ...
bash.exe : ../src/or/rendclient.c: In function 'rend_client_send_introduction':
At line:2 char:5
+ & $commandPath $args 2>&1
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (../src/or/rendc..._introduction'::String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
../src/or/rendclient.c:243:5: error: 'strncpy' output may be truncated copying 20 bytes from a string of length 41 [-Werror=stringop-truncation]
strncpy(tmp, rendcirc->build_state->chosen_exit->nickname,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(MAX_NICKNAME_LEN+1)); /* nul pads */
~~~~~~~~~~~~~~~~~~~~~
https://ci.appveyor.com/project/teor2345/tor/build/1.0.149/job/yttwj9fom8k0jh5c#L1253