Poorly formatted logs for logs of size > 1 MB

Buildkite agent version >= 3.28.1 produces poorly formatted logs(size > 1MB) for builds with non zero exit codes .This seems to happen when the build commands are run through Buildkite.

This is also causing some builds that were working on older versions of the agent to break so it may be a symptom of an underlying issue as this

This is also causing builds that were working for older version of agent to fail

No source files, tests, or entry points are named. Start by reproducing the behavior with Buildkite agent version 3.28.1 or newer using a build command that emits more than 1 MB and exits nonzero, then compare its formatting and success behavior with an older agent version. Done means the large failing build log is correctly formatted and does not cause previously working builds to fail.

Written by the indexing model from the issue text.