diff options
Diffstat (limited to 'src/libstore/filetransfer.cc')
| -rw-r--r-- | src/libstore/filetransfer.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libstore/filetransfer.cc b/src/libstore/filetransfer.cc index 6fe1f9a05..34b92148e 100644 --- a/src/libstore/filetransfer.cc +++ b/src/libstore/filetransfer.cc @@ -6,6 +6,7 @@ #include "signals.hh" #include "compression.hh" #include "strings.hh" +#include <cstddef> #if ENABLE_S3 #include <aws/core/client/ClientConfiguration.h> @@ -784,8 +785,10 @@ struct curlFileTransfer : public FileTransfer size_t read(char * data, size_t len) override { - auto readPartial = [this](char * data, size_t len) { + auto readPartial = [this](char * data, size_t len) -> size_t { const auto available = std::min(len, buffered.size()); + if (available == 0u) return 0u; + memcpy(data, buffered.data(), available); buffered.remove_prefix(available); return available; |