unix: assertion on uv__read_int

[saghul]

On latest master on OSX:

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[%   5|+   8|-   0]: stdio_over_pipes
`stdio_over_pipes` failed: timeout
Output from process `stdio_over_pipes`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
=============================================================
[%   5|+   8|-   1]: ipc_listen_before_write
`ipc_listen_before_write` failed: timeout
Output from process `ipc_listen_before_write`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
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[%   6|+   8|-   2]: ipc_listen_after_write
`ipc_listen_after_write` failed: timeout
Output from process `ipc_listen_after_write`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
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[%   7|+   8|-   3]: ipc_send_recv_pipe
`ipc_send_recv_pipe` failed: timeout
Output from process `ipc_send_recv_pipe`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
=============================================================
[%   7|+   8|-   4]: ipc_send_recv_tcp
`ipc_send_recv_tcp` failed: timeout
Output from process `ipc_send_recv_tcp`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
=============================================================
[%   8|+   8|-   5]: ipc_tcp_connection
`ipc_tcp_connection` failed: timeout
Output from process `ipc_tcp_connection`:
Assertion failed: (n == sizeof(val)), function uv__read_int, file src/unix/process.c, line 260.
=============================================================

[saghul]

I forgot to mention that more tests fail with the same assert, I just copied a few.

[indutny]

Related #524

[bnoordhuis]

Fixed in ac0d468. Thanks for the bug report, Saúl.

[saghul]

Does not assert anymore, thanks Ben!