CID 1454593: passing negative value to memset
Coverity says:
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*** CID 1454593: Memory - illegal accesses (NO_EFFECT)
/src/test/test_util.c: 6200 in test_util_map_anon_nofork()
6194 int pipefd[2] = {-1, -1};
6195 unsigned inherit=0;
6196
6197 tor_munmap_anonymous(ptr, sz);
6198 ptr = tor_mmap_anonymous(sz, ANONMAP_NOINHERIT, &inherit);
6199 tt_ptr_op(ptr, OP_NE, 0);
>>> CID 1454593: Memory - illegal accesses (NO_EFFECT)
>>> Argument "-48" in "memset" loses precision in "memset(ptr, -48, sz)".
6200 memset(ptr, TEST_VALUE, sz);
6201
6202 tt_int_op(0, OP_EQ, pipe(pipefd));
6203 pid_t child = fork();
6204 if (child == 0) {
6205 /* We're in the child. */
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