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-rw-r--r--win32/win32sck.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/win32/win32sck.c b/win32/win32sck.c
index 8019cc3986..14d2e6a45f 100644
--- a/win32/win32sck.c
+++ b/win32/win32sck.c
@@ -269,6 +269,14 @@ win32_select(int nfds, Perl_fd_set* rd, Perl_fd_set* wr, Perl_fd_set* ex, const
int i, fd, bit, offset;
FD_SET nrd, nwr, nex, *prd, *pwr, *pex;
+ /* winsock seems incapable of dealing with all three null fd_sets,
+ * so do the (millisecond) sleep as a special case
+ */
+ if (!(rd || wr || ex)) {
+ Sleep(timeout->tv_sec * 1000 +
+ timeout->tv_usec / 1000); /* do the best we can */
+ return 0;
+ }
StartSockets();
PERL_FD_ZERO(&dummy);
if (!rd)