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Fix race downloading into a sink

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This fixes 'error 10 while decompressing xz file'.

https://hydra.nixos.org/build/78308551
This commit is contained in:
Eelco Dolstra 2018-07-31 17:26:04 +02:00
parent d9e8ab0ff2
commit 4b4adbc93d
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GPG key ID: 8170B4726D7198DE
1 changed files with 8 additions and 6 deletions
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14
src/libstore/download.cc
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@ -718,15 +718,17 @@ void Downloader::download(DownloadRequest && request, Sink & sink)
while (true) {
checkInterrupt();
if (state->quit) {
if (state->exc) std::rethrow_exception(state->exc);
break;
}
/* If no data is available, then wait for the download thread
to wake us up. */
if (state->data.empty())
if (state->data.empty()) {
if (state->quit) {
if (state->exc) std::rethrow_exception(state->exc);
break;
}
state.wait(state->avail);
}
/* If data is available, then flush it to the sink and wake up
the download thread if it's blocked on a full buffer. */