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net: fix crashing Read/Write when passed empty slice on windows

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Fixes #921.

R=rsc
CC=golang-dev
https://golang.org/cl/1862043
This commit is contained in:
Alex Brainman 2010-07-26 12:50:03 +10:00
parent eee095399f
commit 4d87e8ab08
1 changed files with 5 additions and 1 deletions
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6
src/pkg/net/fd_windows.go
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@ -198,7 +198,11 @@ func (fd *netFD) Close() os.Error {
} }
func newWSABuf(p []byte) *syscall.WSABuf { func newWSABuf(p []byte) *syscall.WSABuf {
return &syscall.WSABuf{uint32(len(p)), (*byte)(unsafe.Pointer(&p[0]))} var p0 *byte
if len(p) > 0 {
p0 = (*byte)(unsafe.Pointer(&p[0]))
}
return &syscall.WSABuf{uint32(len(p)), p0}
} }
func (fd *netFD) Read(p []byte) (n int, err os.Error) { func (fd *netFD) Read(p []byte) (n int, err os.Error) {