Shell status code not always correctly set. (Test08 fails)

[paulhankin]

Test08 fails, in that it returns a non-zero shell status code (1 on my machine).

The main() function calls std::exit(0), so the status code should be 0. (Just as a note -- the call to std::exit(0) is redundant in the test, since dropping off the end of main is the same as returning 0, which is the same as exit(0)).

dbt run "//libsupcxx/tests/Test08" cc-toolchain=linux-x86_64-libsupcxx

Running libsupcxx/tests/Test08:
Constructing global object
glibcxx datestamp: 20180726
glibcxx release: 8
sizeof(std::size_t): 8
float eval method: 0
ULLONG_MAX: 18446744073709551615
__alignas_is_defined: 1
printArgs(5, 1, 2, 3, 4, 5)
__bool_true_false_are_defined: 1
sizeof(std::uint8_t): 1
At exit function called
Destructing global object
FAILED: libsupcxx/tests/Test08#run