proto: fix self-merging

While odd, it is possible to merge a message into itself.
In such a situation, the material impact is that repeated
and unknown fields are duplicated. The previous logic would
inifinite loop since the list iteration logic uses the current
length, but since the current length is ever growing, this loop
will never terminate. Instead, record the list length once
and iterate exactly that many times.

Change-Id: Ief98afa1b20bd950a9c2422d4462b170dbe6fa11
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/196857
Reviewed-by: Damien Neil <dneil@google.com>
2 files changed
tree: 126cabec1b9719b1d6be305e8f2f3e4ff678dbd9
  1. benchmarks/
  2. cmd/
  3. compiler/
  4. encoding/
  5. internal/
  6. proto/
  7. reflect/
  8. runtime/
  9. testing/
  10. types/
  11. .gitignore
  12. .travis.yml
  13. AUTHORS
  14. CONTRIBUTING.md
  15. CONTRIBUTORS
  16. go.mod
  17. go.sum
  18. integration_test.go
  19. LICENSE
  20. PATENTS
  21. README.md
  22. regenerate.bash
  23. release.bash
  24. test.bash
README.md

Next Generation Go Protocol Buffers

WARNING: This repository is in active development. There are no guarantees about API stability. Breaking changes will occur until a stable release is made and announced.

This repository is for the development of the next major Go implementation of protocol buffers. This library makes breaking API changes relative to the existing Go protobuf library. Of particular note, this API aims to make protobuf reflection a first-class feature of the API and implements the protobuf ecosystem in terms of reflection.

Design Documents

List of relevant design documents:

Contributing

We appreciate community contributions. See CONTRIBUTING.md.

Reporting Issues

Issues regarding the new API can be filed at github.com/golang/protobuf. Please use a APIv2: prefix in the title to make it clear that the issue is regarding the new API work.