Hello, I built haproxy using gcc-9
make CC=gcc V=1 TARGET=linux2628 USE_ZLIB=1 USE_PCRE=1 USE_PCRE_JIT=1 USE_LUA=1 USE_OPENSSL=1 DEBUG_CFLAGS="-g -fsanitize=address" LDFLAGS="-lasan" finding is: *** h1 0.1 debug|==8326==ERROR: LeakSanitizer: detected memory leaks *** h1 0.1 debug| *** h1 0.1 debug|Direct leak of 24 byte(s) in 1 object(s) allocated from: *** h1 0.1 debug| #0 0x7f33138ec1a8 in __interceptor_malloc (/lib64/libasan.so.5+0x10e1a8) *** h1 0.1 debug| #1 0x7f33136f3b1b (/lib64/libssl.so.1.1+0x33b1b) *** h1 0.1 debug| *** h1 0.1 debug|Direct leak of 1 byte(s) in 1 object(s) allocated from: *** h1 0.1 debug| #0 0x7f33138749dd in strdup (/lib64/libasan.so.5+0x969dd) *** h1 0.1 debug| #1 0x817241 in mworker_env_to_proc_list src/mworker.c:167 *** h1 0.1 debug| *** h1 0.1 debug|SUMMARY: AddressSanitizer: 25 byte(s) leaked in 2 allocation(s).