diff options
Diffstat (limited to 'lib/dialyzer/test')
4 files changed, 32 insertions, 3 deletions
diff --git a/lib/dialyzer/test/small_SUITE_data/results/higher_order_discrepancy b/lib/dialyzer/test/small_SUITE_data/results/higher_order_discrepancy index 7ce440a60d..11b9ecade6 100644 --- a/lib/dialyzer/test/small_SUITE_data/results/higher_order_discrepancy +++ b/lib/dialyzer/test/small_SUITE_data/results/higher_order_discrepancy @@ -1,4 +1,3 @@ -higher_order_discrepancy.erl:11: The call higher_order_discrepancy:g('foo') will never return since it differs in the 1st argument from the success typing arguments: ('bar') -higher_order_discrepancy.erl:14: Function g/1 has no local return -higher_order_discrepancy.erl:14: The pattern 'bar' can never match the type 'foo' +higher_order_discrepancy.erl:19: Function g/1 has no local return +higher_order_discrepancy.erl:19: The pattern 'bar' can never match the type 'foo' diff --git a/lib/dialyzer/test/small_SUITE_data/src/higher_order_discrepancy.erl b/lib/dialyzer/test/small_SUITE_data/src/higher_order_discrepancy.erl index ff5ee6bac4..f9547d4929 100644 --- a/lib/dialyzer/test/small_SUITE_data/src/higher_order_discrepancy.erl +++ b/lib/dialyzer/test/small_SUITE_data/src/higher_order_discrepancy.erl @@ -1,3 +1,8 @@ +%% With the patch introduced to avoid false warnings in +%% user_SUITE_data/src/wpc_hlines.erl we can unfortunately no longer precisely +%% catch problems like this one... The refinement procedure is still enough to +%% keep some of the details, nevertheless. + -module(higher_order_discrepancy). -export([test/1]). diff --git a/lib/dialyzer/test/user_SUITE_data/results/wpc_hlines b/lib/dialyzer/test/user_SUITE_data/results/wpc_hlines new file mode 100644 index 0000000000..d6e3f29ab9 --- /dev/null +++ b/lib/dialyzer/test/user_SUITE_data/results/wpc_hlines @@ -0,0 +1,3 @@ + +wpc_hlines.erl:22: Function bad/1 has no local return +wpc_hlines.erl:22: The pattern 'false' can never match the type 'true' diff --git a/lib/dialyzer/test/user_SUITE_data/src/wpc_hlines.erl b/lib/dialyzer/test/user_SUITE_data/src/wpc_hlines.erl new file mode 100644 index 0000000000..8c205a8247 --- /dev/null +++ b/lib/dialyzer/test/user_SUITE_data/src/wpc_hlines.erl @@ -0,0 +1,22 @@ +%% Bug reported by Dan Gudmundsson, test shrunk down by Magnus Lång. + +%% The problem is that dialyzer_dep generates edges from the fun +%% application to both of the functions, and then during the warning pass +%% dialyzer_dataflow:handle_apply_or_call generates warnings for any such +%% edge that won't return. + +%% Since dialyzer_dep is currently supposed to overapproximate rather than +%% underapproximate, the fix was to modify handle_apply_or_call to not generate +%% warnings if some of the possible funs can succeed. + +-module(wpc_hlines). + +-export([do_export/0]). + +do_export() -> + {Proj, _} = % The culprit seems to be putting the funs in a tuple + {fun good/1, fun bad/1}, + Proj(true). + +good(_) -> ok. +bad(false) -> ok. |