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Fix a bug where .write([]) would always fail. #3912

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Merged
merged 1 commit into from
Nov 3, 2012
Merged

Fix a bug where .write([]) would always fail. #3912

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12 changes: 9 additions & 3 deletions src/libcore/io.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -377,9 +377,8 @@ impl<T: Writer, C> {base: T, cleanup: C}: Writer {
impl *libc::FILE: Writer {
fn write(v: &[const u8]) {
do vec::as_const_buf(v) |vbuf, len| {
let nout = libc::fwrite(vbuf as *c_void, len as size_t,
1u as size_t, self);
if nout < 1 as size_t {
let nout = libc::fwrite(vbuf as *c_void, 1, len as size_t, self);
if nout != len as size_t {
error!("error writing buffer");
log(error, os::last_os_error());
fail;
Expand Down Expand Up @@ -959,6 +958,13 @@ mod tests {
}
}

#[test]
fn test_write_empty() {
let file = io::file_writer(&Path("tmp/lib-io-test-write-empty.tmp"),
[io::Create]).get();
file.write([]);
}

#[test]
fn file_writer_bad_name() {
match io::file_writer(&Path("?/?"), ~[]) {
Expand Down