Unexpected EndOfFile Error When Running iter_messages

[kwesiRutledge-aescape]

Description

• Version: 0.15.2
• Platform: Linux (VS Code Devcontainer inside of Linux)

We've previously used the client to analyze some TriangleMesh data from our robot via this API. The script we were using was working a month or so ago, but I returned yesterday to see that the part of the code that extracts TriangleMesh messages is now breaking for a reason that I can't seem to understand.

Steps To Reproduce
Here is the problematic code block:

# Setup
msgs_found = []

for _, _, _, decoded_message in client.iter_messages(
    device_id=coverage["device_id"],
    start=coverage["start"],
    end=coverage["end"],
    topics=["/topic/containing/triangle/meshes"],
):
    msgs_found += [decoded_message]

whenever the iter_messages() method is run, we now receive this error:

for _, _, _, decoded_message in client.iter_messages(
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/reader.py", line 191, in iter_decoded_messages
    for schema, channel, message in message_iterator:
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/reader.py", line 494, in iter_messages
    for t in sorted(
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/reader.py", line 508, in _iter_messages_internal
    for record in self._stream_reader.records:
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/stream_reader.py", line 156, in records
    opcode = self._stream.read1()
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/data_stream.py", line 41, in read1
    [value] = struct.unpack("<B", self.read(1))
  File "/home/ros/.local/lib/python3.10/site-packages/mcap/data_stream.py", line 31, in read
    raise EndOfFile()
mcap.exceptions.EndOfFile

I'm not sure why this is now occurring. Doing some digging, I can see that at some point the following header is read

ipdb> record
Header(profile='', library='mcap go v1.4.1; fg-data-platform-daf59710')

I'm not familiar with the message that has that Header, but the empty profile might be what's causing this strange EndOfFile exception?

Expected Behavior

I had previously designed a script so that we could extract some Triangle Mesh data data from our Foxglove sessions, but it looks like that script has recently broken and I can't seem to figure out why.

[defunctzombie]

Internal tracking issue: https://linear.app/foxglove/issue/FG-9222/unexpected-error-when-running-iter-messages