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4ccbefc241
compiler/unused_imports.m:
As above. This fixes Mantis bug #483.
tests/valid/bug483.m:
The test case for this bug.
tests/valid/Mercury.options:
tests/valid/Mmakefile:
Enable the new test case with the right options.
19 lines
600 B
Mathematica
19 lines
600 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% With --warn-unused-imports, Versions of the compiler before 2019 sep 2
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% used to emit a warning about the list module being imported but not used,
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% even though it *is* used in the type constructor for the "empty" inst.
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% To test whether we emit this warning, this program is compiled with
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% --halt-at-warn.
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%
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:- module bug483.
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:- interface.
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:- import_module list.
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:- inst empty for list/1
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---> [].
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