MERCURY_OPTIONS= --deep-random-write=25 --deep-std-name --mdb-disable-progress
gmake[3]: Entering directory '/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/tests/invalid_submodules'
{ \
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/stage2/scripts/mmc --make-short-interface --grade hlc.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    sub_visibility_a1.m && \
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/stage2/scripts/mmc --make-private-interface --grade hlc.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    sub_visibility_a1.m && \
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/stage2/scripts/mmc --make-interface --grade hlc.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    sub_visibility_a1.m && \
/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/stage2/scripts/mmc -C --grade hlc.gc    --mercury-linkage static --flags ../TESTS_FLAGS --flags ../WS_FLAGS --color-diagnostics -O5 --intermod-opt    sub_visibility_a1.m; \
} > sub_visibility_a1.err 2>&1 || true
Comparing sub_visibility_a1.err with sub_visibility_a1.err_exp*,
	results in sub_visibility_a1.err_res
** sub_visibility_a1.err did not match the expected error output
** (closest match was sub_visibility_a1.err_res1)
--- sub_visibility_a1.err_exp	2026-07-20 22:00:32.000000000 +1000
+++ sub_visibility_a1.err	2026-07-21 00:48:41.701410901 +1000
@@ -2,3 +2,5 @@
 sub_visibility_a1.m:008:   warning: module `sub_visibility_a1.sub2' is imported
 sub_visibility_a1.m:008:   in the interface, but it is not used in the
 sub_visibility_a1.m:008:   interface.
+Warning: cannot open `sub_visibility_a1.opt'.
+Warning: cannot open `sub_visibility_a1.sub2.opt'.
gmake[3]: *** [../Mmake.common:170: sub_visibility_a1.err_res] Error 1
gmake[3]: Target 'sub_visibility_a1.runtest' not remade because of errors.
gmake[3]: Leaving directory '/home/mercury/testing/run/build/mercury-srcdist-rotd-2026-07-20/tests/invalid_submodules'