Fix weak_dispatch and explicit_conversion_dispatch in reference-returning overloads
#11
| Job | Run time |
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| 26s | |
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| 8m 26s | |
| 12m 19s | |
| 10m 3s | |
| 10m 51s | |
| 2m 48s | |
| 3m 7s | |
| 3m 1s | |
| 2m 43s | |
| 21s | |
| 2m 53s | |
| 1m 28s | |
| 1m 44s | |
| -1s | |
| 9m 53s | |
| 8m 26s | |
| 1m 44s | |
| 21s | |
| 10m 3s | |
| 12m 19s | |
| 6m 31s | |
| 10m 51s | |
| 2m 43s | |
| 1m 28s | |
| 2m 48s | |
| 3m 7s | |
| 2m 53s | |
| 3m 1s | |
| 19s | |
| 2h 23m 7s |