Failing test: with the only processing slot held, a request for a new
width of a cached image waits for the slot while the cached file is
rewritten; the answer must come from the rewritten file, so the request
read none of the source before it had a slot. Also a test that a fetch
whose request context ends while it waits for a connection shared by all
hosts gives its host's slot back; that one passes already.
Model: opus-5-5
Failing tests for two limits that do not exist yet. Config:
max_concurrent_processing and upstream_connections, their defaults, and
valid and invalid values from the file and the environment. Image
processor: never more images at once than its limit, waiting and then
failing with ErrTooManyImages when no slot frees, and freeing its slot on
every error. Fetcher: connections to all hosts counted together, apart
from the per-host limit, and freed on errors. Both image routes answer
503 when either wait gives up. TestEnvironmentSetsEveryKey sets the two
new variables, as it compares the whole config. The tests do not compile
until the limits exist.
Model: opus-5-5
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