MERCURY_OPTIONS= --deep-random-write=25 --deep-std-name --mdb-disable-progress
gmake[3]: Entering directory '/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/tests/invalid_submodules'
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/stage2/scripts/mmc --make-short-interface --grade asm_fast.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    \
	bug584_helper_1
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/stage2/scripts/mmc --make-private-interface --grade asm_fast.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    \
	bug584_helper_1
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/stage2/scripts/mmc --make-interface --grade asm_fast.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    \
	bug584_helper_1 > bug584.err 2>&1
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/stage2/scripts/mmc -C --grade asm_fast.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    \
	bug584_helper_1 >> bug584.err 2>&1
Comparing bug584.err with bug584.err_exp*,
	results in bug584.err_res
** bug584.err did not match the expected error output
** (closest match was bug584.err_res1)
--- bug584.err_exp	2026-08-19 21:35:18.000000000 +1000
+++ bug584.err	2026-08-20 02:48:48.405760620 +1000
@@ -1,3 +1,4 @@
+Warning: cannot open `bug584_helper_1.sub2.opt'.
 bug584_helper_1.m:018: In the second argument of function symbol `struct'
 bug584_helper_1.m:018:   (field name `f2') of the type `struct'/0:
 bug584_helper_1.m:018:   the type `foo'/0 is only visible here due to an import
@@ -9,3 +10,5 @@
 bug584_helper_1.m:019:   here due to an import of `bug584_helper_1.sub2' in an
 bug584_helper_1.m:019:   ancestor module's implementation section. This
 bug584_helper_1.m:019:   behaviour is deprecated.
+Warning: cannot open `bug584_helper_1.opt'.
+Warning: cannot open `bug584_helper_1.opt'.
gmake[3]: *** [../Mmake.common:170: bug584.err_res] Error 1
gmake[3]: Target 'bug584.runtest' not remade because of errors.
gmake[3]: Leaving directory '/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-08-19/tests/invalid_submodules'