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-rw-r--r--testsuite/tests/polykinds/T13393.stderr2
1 files changed, 1 insertions, 1 deletions
diff --git a/testsuite/tests/polykinds/T13393.stderr b/testsuite/tests/polykinds/T13393.stderr
index 3836059249..8b56b12451 100644
--- a/testsuite/tests/polykinds/T13393.stderr
+++ b/testsuite/tests/polykinds/T13393.stderr
@@ -1,5 +1,5 @@
-T13393.hs:61:3: error:
+T13393.hs:61:3: error: [GHC-39999]
• Ambiguous type variable ‘t0’ arising from a use of ‘mapM’
prevents the constraint ‘(Traversable t0)’ from being solved.
Probable fix: use a type annotation to specify what ‘t0’ should be.