Use the AddressSanitizer (ASAN)

$ $CC -fsanitize=address $CFLAGS ...

$ meson compile -Db_sanitize=address ...

The Address Sanitizer, in short ASAN is useful to detect memory access errors like buffer under-/overflows, use after free or double free in C and C++ during debugging. It can be activated during compile-time with a command-line switch.