[Bug] Basic sweeper would behavior wrong with value type dict #3106
Description
🐛 Bug
Description
# python main.py -m +a={x:1},{x:2} +a={y:10},{y:20}
import hydra
@hydra.main(version_base="1.3", config_path=None, config_name=None)
def main(cfg) -> None:
print(cfg)
if __name__ == "__main__":
main()would only run with
[2025-12-20 18:18:03,320][HYDRA] Launching 2 jobs locally
[2025-12-20 18:18:03,320][HYDRA] #0 : +a={y:10}
{'a': {'y': 10}}
[2025-12-20 18:18:03,348][HYDRA] #1 : +a={y:20}
{'a': {'y': 20}}
It should be run 4 jobs
[2025-12-20 18:18:03,320][HYDRA] Launching 4 jobs locally
[2025-12-20 18:18:03,320][HYDRA] #0 : +a={x:1} +a={y:10}
{'a': {'x': 1, 'y': 10}}
[2025-12-20 18:18:03,348][HYDRA] #1 : +a={x:1} +a={y:20}
{'a': {'x': 1, 'y': 20}}
[2025-12-20 18:18:03,373][HYDRA] #2 : +a={x:2} +a={y:10}
{'a': {'x': 2, 'y': 10}}
[2025-12-20 18:18:03,399][HYDRA] #3 : +a={x:2} +a={y:20}
{'a': {'x': 2, 'y': 20}}
Checklist
- I checked on the latest version of Hydra
- I created a minimal repro (See this for tips).
To reproduce
see above
Expected Behavior
Works the same way without -m
System information
- Hydra Version :
- Python version :
- Virtual environment type and version :
- Operating system :
Additional context
The basic_sweeper would only take last key into account.