[Bug 4177] "read" not working since 1.19.x

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=4177

--- Comment #4 from Oliver Metz <oliver.metz at gmx.de>  ---
I can confirm the behaviour. 1.18.5 worked. 1.19.2 hangs.

# strace sh -c read a b c d e < /proc/mounts
execve("/bin/sh", ["sh", "-c", "read", "a", "b", "c", "d", "e"], [/* 235 vars
*/]) = 0
...
wait4(-1, 0x7fe928f8, WNOHANG, NULL)    = -1 ECHILD (No child processes)
poll([{fd=0, events=POLLIN}], 1, -1^C <unfinished ...>

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