Duplicated output

gistfile1.bash

> ./hadrian/build-stack -c -j --flavour=quick test --only=package08e
[...]
--- "/tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run/package08e.stderr.normalised"	2020-04-30 17:00:20.518628015 +0200
+++ "/tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run/package08e.comp.stderr.normalised"	2020-04-30 17:00:20.518628015 +0200
@@ -3,6 +3,7 @@
     Could not find module ‘GHC.Hs.MyTypes’
     Perhaps you meant
       GHC.Hs.Types (needs flag -package-key ghc-<VERSION>)
+      GHC.Hs.Types (needs flag -package-key ghc-<VERSION>)
       GHC.Tc.Types (needs flag -package-key ghc-<VERSION>)
     Use -v (or `:set -v` in ghci) to see a list of the files searched for.
 
@@ -11,6 +12,9 @@
     It is a member of the hidden package ‘ghc-<VERSION>’.
     You can run ‘:set -package ghc’ to expose it.
     (Note: this unloads all the modules in the current scope.)
+    It is a member of the hidden package ‘ghc-<VERSION>’.
+    You can run ‘:set -package ghc’ to expose it.
+    (Note: this unloads all the modules in the current scope.)
     Use -v (or `:set -v` in ghci) to see a list of the files searched for.
 
 package08e.hs:4:1:
@@ -18,6 +22,9 @@
     It is a member of the hidden package ‘ghc-<VERSION>’.
     You can run ‘:set -package ghc’ to expose it.
     (Note: this unloads all the modules in the current scope.)
+    It is a member of the hidden package ‘ghc-<VERSION>’.
+    You can run ‘:set -package ghc’ to expose it.
+    (Note: this unloads all the modules in the current scope.)
     Use -v (or `:set -v` in ghci) to see a list of the files searched for.
 
 package08e.hs:5:1:
@@ -25,4 +32,7 @@
     It is a member of the hidden package ‘ghc-<VERSION>’.
     You can run ‘:set -package ghc’ to expose it.
     (Note: this unloads all the modules in the current scope.)
+    It is a member of the hidden package ‘ghc-<VERSION>’.
+    You can run ‘:set -package ghc’ to expose it.
+    (Note: this unloads all the modules in the current scope.)
     Use -v (or `:set -v` in ghci) to see a list of the files searched for.

====> Scanning libraries/base/tests/Numeric/all.T
====> Scanning libraries/base/tests/System/all.T
====> Scanning libraries/base/tests/Text.Printf/all.T
====> Scanning libraries/ghc-compact/tests/all.T
====> Scanning libraries/process/tests/all.T
====> Scanning libraries/process/tests/T9775/all.T
====> Scanning libraries/stm/tests/all.T
====> Scanning libraries/unix/tests/all.T
====> Scanning libraries/unix/tests/libposix/all.T
=====> package08e(normal) 1 of 1 [0, 0, 0]
cd "/tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run" &&  "/home/hsyl20/projects/ghc/dynflags/_build/stage1/bin/ghc" -c package08e.hs -dcore-lint -dstg-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-missed-specialisations -fshow-warning-groups -fdiagnostics-color=never -fno-diagnostics-show-caret -Werror=compat -dno-debug-output  -package "ghc (GHC.Hs.Types as GHC.Hs.MyTypes, GHC.Hs.Utils)" -hide-package ghc < 
Actual stderr output differs from expected:
diff -uw "/tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run/package08e.stderr.normalised" "/tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run/package08e.comp.stderr.normalised"< 
*** unexpected failure for package08e(normal)

Performance Metrics (test environment: local):


None collected.


Unexpected results from:
TEST="package08e"

SUMMARY for test run started at Thu Apr 30 17:00:20 2020 
0:00:00.312585 spent to go through
       1 total tests, which gave rise to
       1 test cases, of which
       0 were skipped

       0 had missing libraries
       0 expected passes
       0 expected failures

       0 caused framework failures
       0 caused framework warnings
       0 unexpected passes
       1 unexpected failures
       0 unexpected stat failures
       0 fragile tests

Unexpected failures:
   /tmp/ghctest-2jazcfzv/test   spaces/testsuite/tests/package/package08e.run  package08e [stderr mismatch] (normal)