This fixes a serious issue as `try' goals are not properly written to
.opt files, so when read back would not actually catch any exceptions.
Bug #420.
At the point where we are to create the .opt file, the pieces of a `try'
goal exist in a "pre-transformed" hlds_goal. Teasing apart the pieces to
resemble the original `try' goal would be non-trivial.
compiler/intermod.m:
Do not export any predicate or function with a clause containing a
`try' goal.
library/exception.m
Throw an exception if the dummy predicate
`magic_exception_result/1' is ever called.
tests/hard_coded/Mercury.options:
tests/hard_coded/Mmakefile:
tests/hard_coded/intermod_try_goal.exp:
tests/hard_coded/intermod_try_goal.m:
tests/hard_coded/intermod_try_goal2.m:
Add test case.
NEWS:
Announce change.
