Now deepcopy(::AbstractModel) calls error #2079
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…t copying the underlying solver and, if this is not done, then deepcopy does not behave as would be expected).
mlubin
reviewed
Oct 11, 2019
…or Model, not AbstractModel. Added more info to the error message.
Codecov Report
@@ Coverage Diff @@
## master #2079 +/- ##
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- Coverage 91.1% 91.08% -0.03%
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Files 38 38
Lines 4318 4319 +1
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Hits 3934 3934
- Misses 384 385 +1
Continue to review full report at Codecov.
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blegat
reviewed
Oct 11, 2019
blegat
reviewed
Oct 13, 2019
blegat
approved these changes
Oct 13, 2019
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There is no plan to support copying the underlying solver and, if this is not done, then the object returned by deepcopy does not behave as would be expected (both copy and original edit the same underlying model).
This has been a source of frustration before:
https://discourse.julialang.org/t/jump-gurobi-bug-value-of-variable-in-solved-model-changes-after-deleting-another-variable/29619/7
https://discourse.julialang.org/t/strange-behavior-with-deepcopy/23342/3
https://discourse.julialang.org/t/workaround-for-modifying-coefficients-in-constraints-in-jump/27123/9