Compile errors occured at Linux

[master-q]

On my Debian GNU/Linux PC, this code causes following compile errors:

$ git clone git@github.com:microsoft/checkedc-clang.git
$ cd checkedc-parson/llvm/projects/checkedc-wrapper
$ git clone git@github.com:microsoft/checkedc.git
$ cd ../../../..
$ mkdir checkedc-clang-build
$ cd checkedc-clang-build
$ cmake -G Ninja -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_ENABLE_PROJECTS=clang ../checkedc-clang/llvm
$ ninja clang
$ ./bin/clang --version
clang version 9.0.0 (git@github.com:microsoft/checkedc-clang.git 07c6082412d73d07676014a78651af56d327acc8)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/kiwamu/src/checkedc/checkedc-clang-build/./bin
$ git clone git@github.com:microsoft/checkedc-parson.git
$ ls
checkedc-clang/  checkedc-clang-build/  checkedc-parson/  parson/
$ cd checkedc-parson
$ git diff
diff --git a/Makefile b/Makefile
index 3972877..7cb6519 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CC = clang
+CC = ../checkedc-clang-build/bin/clang
 CFLAGS = -O0 -g -Wall -Wextra -std=c99 -pedantic-errors
 
 all: test
diff --git a/tests.c b/tests.c
index 76c1611..f067a92 100644
--- a/tests.c
+++ b/tests.c
@@ -68,10 +68,12 @@ static int tests_passed;
 static int tests_failed;
 
 int main() {
+    int i;
     /* Example functions from readme file:      */
     /* print_commits_info("torvalds", "linux"); */
     /* serialization_example(); */
     /* persistence_example(); */
+    for (i = 0; i < 1000; i++) {
     json_set_allocation_functions(counted_malloc, counted_free);
     test_suite_1();
     test_suite_2_no_comments();
@@ -88,6 +90,7 @@ int main() {
 
     printf("Tests failed: %d\n", tests_failed);
     printf("Tests passed: %d\n", tests_passed);
+    }
     return 0;
 }
$ make compile |& grep -A 6 error
../checkedc-clang-build/bin/clang -O0 -g -Wall -Wextra -std=c99 -pedantic-errors -o test tests.c parson.c
parson.c:78:29: error: static variable 'parson_malloc' has a type that uses a type variable bound in an enclosing scope (type is 'JSON_Malloc_Function' and type variable is 'T')
static JSON_Malloc_Function parson_malloc;
                            ^
./parson.h:63:24: note: type variable 'T' declared here
typedef _Itype_for_any(T) void * tmp_malloc_fun(size_t s) : byte_count(s) itype(_Array_ptr<T>);
                       ^
parson.c:79:27: error: static variable 'parson_free' has a type that uses a type variable bound in an enclosing scope (type is 'JSON_Free_Function' and type variable is 'T')
static JSON_Free_Function parson_free;
                          ^
./parson.h:64:24: note: type variable 'T' declared here
typedef _Itype_for_any(T) void tmp_free_fun(void * : byte_count(0) itype(_Array_ptr<T>));
                       ^
parson.c:292:35: warning: cannot prove argument meets declared bounds for 1st parameter [-Wcheck-bounds-decls-checked-scope]
--
44 warnings and 2 errors generated.
make: *** [Makefile:12: compile] Error 1

How to fix them?