make check fails two tests related to cloexec

I just downloaded the current version of blink, and after configure and make, it fails two of the tests in 'make check'.

The tests are the test/libc/calls/closefrom_test.c on line 62, where fcntl returns 1 instead of 0 and the test/libc/calls/dup_test.c on line 81, where the messages says dup_clearsCloexecFlag doesn't happen.

I just deleted those lines from the comsmopolitan libc test makefile, and everything else works.

But this seems problematic.

Does blink deliberately violate the spec on dup clearing the cloexec flag? I presume cosmopolitan libc is not where the bug is.

I could do a fix if I know what the right fix is.