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| author | Zandra Hird <[email protected]> | 2015-05-08 13:31:57 +0200 |
|---|---|---|
| committer | Zandra Hird <[email protected]> | 2015-05-08 13:31:57 +0200 |
| commit | b9c2f04a51ee20e49b74dcdb160ca102a217edc5 (patch) | |
| tree | 42228dd3233c30246bbc8fec363fd4f8ed485c3f /lib/dialyzer/test | |
| parent | 6b15e5e613c4688c5fbd7bc409a011971b699dc3 (diff) | |
| parent | 00ff3b3776a62402e7977fd9172a926ad62ea449 (diff) | |
| download | otp-b9c2f04a51ee20e49b74dcdb160ca102a217edc5.tar.gz otp-b9c2f04a51ee20e49b74dcdb160ca102a217edc5.tar.bz2 otp-b9c2f04a51ee20e49b74dcdb160ca102a217edc5.zip | |
Merge branch 'aronisstav/dialyzer-inv-mult'
* aronisstav/dialyzer-inv-mult:
Fix a bug related to constraints generated for erlang:'*'/2
OTP-12725
Diffstat (limited to 'lib/dialyzer/test')
| -rw-r--r-- | lib/dialyzer/test/small_SUITE_data/src/inv_mult.erl | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/dialyzer/test/small_SUITE_data/src/inv_mult.erl b/lib/dialyzer/test/small_SUITE_data/src/inv_mult.erl new file mode 100644 index 0000000000..3413556813 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/inv_mult.erl @@ -0,0 +1,15 @@ +%% Dialyzer was too constraining when checking the relation between the +%% arguments and result of a multiplication. We should not constrain an argument +%% if the other operand *may* be zero. +%% +%% Bug found by Kostis Sagonas, fixed by Stavros Aronis + +-module(inv_mult). +-compile(export_all). + +main(L) -> + N = -1 * length(L), + fact(N). + +fact(0) -> 1; +fact(N) -> N * fact(N-1). |