2019-09-20 11:05 AEST

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IDProjectCategoryView StatusLast Update
0000155mercuryBugpublic2010-07-07 18:01
Reporterpbone 
Assigned To 
PrioritynormalSeveritymajorReproducibilityalways
StatusnewResolutionopen 
Product Version 
Target VersionFixed in Version 
Summary0000155: Mode error with impure code.
DescriptionI'm writing a failure driven loop that uses impurity to implement a branch and bound solver. The mode checker tells me that a value is 'free' when it should be (and is) 'ground'.

I will attach two programs that exhibit this error. Note that removing the switch on BestSolutionFinal and changing the type of the predicates output makes the problem go away.
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~0000275

pbone (administrator)

Test case one:

pbone@taura:/tmp$ mmc --compile-to-c bug155a
bug155a.m:060: In clause for `branch_and_bound((pred(in, out) is nondet),
bug155a.m:060: (func(in) = out is det), out)':
bug155a.m:060: in argument 2 of call to predicate `float.<'/2:
bug155a.m:060: mode error: variable `BestObjective' has instantiatedness
bug155a.m:060: `free',
bug155a.m:060: expected instantiatedness was `ground'.
For more information, recompile with `-E'.

~0000276

pbone (administrator)

Test case two:

pbone@taura:/tmp$ mmc --compile-to-c bug155b
bug155b.m:069: In clause for `branch_and_bound((pred(in, out) is nondet),
bug155b.m:069: (func(in) = out is det), out)':
bug155b.m:069: in argument 2 of call to predicate `mutvar.set_mutvar'/2:
bug155b.m:069: mode error: variable `BestSolutions' has instantiatedness
bug155b.m:069: `free',
bug155b.m:069: expected instantiatedness was `ground'.
For more information, recompile with `-E'.
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-Issue History
Date Modified Username Field Change
2010-07-07 17:51 pbone New Issue
2010-07-07 17:58 pbone File Added: bug155a.m
2010-07-07 17:59 pbone Note Added: 0000275
2010-07-07 18:01 pbone File Added: bug155b.m
2010-07-07 18:01 pbone Note Added: 0000276
+Issue History