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[GH-ISSUE #2738] Writing a large dictionary to GITHUB_OUTPUT doesn't set an output value #1237
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Originally created by @barneysowood on GitHub (Apr 23, 2025).
Original GitHub issue: https://github.com/nektos/act/issues/2738
Bug report info
Command used with act
Describe issue
I have an issue where a large dictionary is written to GITHUB_OUTPUT. Below a certain size this works fine, above a certain size, the expected variable doesn't get set (with
::set-output::).The linked repo has simple demonstration of this. With 2822 kv pairs in the dict, it works as expected, with 2823, the var is not set.
Test script looks like this:
For 2822 items:
For 2823 items:
Link to GitHub repository
https://github.com/barneysowood/act-test-repo
Workflow content
Relevant log output
Additional information
I also tried with just strings of various sizes and couldn't replicate the issue.
@barneysowood commented on GitHub (Apr 23, 2025):
I'm going to close this - further investigation indicates the dictionary in the actual repo I'm seeing the issue in isn't this big - something else is happening. Will open a new issue once I've worked out what I'm actually seeing.