Re: [PATCH] test-lib: have SANITIZE=leak imply TEST_NO_MALLOC_CHECK

> Since 131b94a10a7 (test-lib.sh: Use GLIBC_TUNABLES instead of
> MALLOC_CHECK_ on glibc >= 2.34, 2022-03-04) compiling with
> SANITIZE=leak has missed reporting some leaks. The old MALLOC_CHECK
> method used before glibc 2.34 seems to have been (mostly?) compatible
> with it, but after 131b94a10a7 e.g. running:
> 
> 	TEST_NO_MALLOC_CHECK=1 make SANITIZE=leak test T=t6437-submodule-merge.sh
> 
> Would report a leak in builtin/commit.c, but this would not:
> 
> 	TEST_NO_MALLOC_CHECK= make SANITIZE=leak test T=t6437-submodule-merge.sh
> 
> Since the interaction is clearly breaking the SANITIZE=leak mode,
> let's mark them as explicitly incompatible.
> 
> A related regression for SANITIZE=address was fixed in
> 067109a5e7d (tests: make SANITIZE=address imply TEST_NO_MALLOC_CHECK,
> 2022-04-09).

>   # Add libc MALLOC and MALLOC_PERTURB test only if we are not executing
> -# the test with valgrind and have not compiled with SANITIZE=address.
> +# the test with valgrind and have not compiled with conflict SANITIZE
> +# options.
>   if test -n "$valgrind" ||
> +   test -n "$SANITIZE_LEAK" ||
>      test -n "$SANITIZE_ADDRESS" ||
>      test -n "$TEST_NO_MALLOC_CHECK"