diff options
Diffstat (limited to 'testsuite/tests/patsyn/should_fail/unidir.stderr')
| -rw-r--r-- | testsuite/tests/patsyn/should_fail/unidir.stderr | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/testsuite/tests/patsyn/should_fail/unidir.stderr b/testsuite/tests/patsyn/should_fail/unidir.stderr index 39193dffd1..ba3799d201 100644 --- a/testsuite/tests/patsyn/should_fail/unidir.stderr +++ b/testsuite/tests/patsyn/should_fail/unidir.stderr @@ -1,5 +1,7 @@ unidir.hs:4:18: error: Invalid right-hand side of bidirectional pattern synonym ‘Head’: - pattern ‘_’ is not invertible + Pattern ‘_’ is not invertible + Suggestion: instead use an explicitly bidirectional pattern synonym, e.g. + pattern Head x <- x : _ where Head x = ... RHS pattern: x : _ |