Add release note about fix to #16502.

We thought we needed to update the manual, but the fix for #16502
actually brings the implementation in line with the manual. So we
just alert users of how to update their code.
36 jobs for master in 393 minutes and 47 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint
passed #285342
lint
lint-linters

00:00:13

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lint
lint-submods-branch

00:00:30

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lint
lint-testsuite

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passed #285344
lint
typecheck-testsuite

00:00:14

 
  Quick Build
passed #285346
x86_64-linux
hadrian-ghc-in-ghci

00:18:50

 
  Build
passed #285347
x86_64-linux
validate-x86_64-linux-deb9-hadrian

02:38:54

 
  Full Build
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aarch64-linux allowed to fail
nightly-aarch64-linux-deb9

03:33:59

passed #285354
armv7-linux
nightly-armv7-linux-deb9

03:25:32

passed #285356
x86_64-linux
nightly-i386-linux-deb9

01:41:15

failed #285371
new-x86_64-windows test allowed to fail
nightly-i386-windows

00:00:45

failed #285367
new-x86_64-windows test allowed to fail
nightly-i386-windows-hadrian

00:04:26

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x86_64-freebsd allowed to fail
nightly-x86_64-freebsd

00:17:42

failed #285364
x86_64-linux allowed to fail
nightly-x86_64-linux-alpine

02:44:39

passed #285363
x86_64-linux
nightly-x86_64-linux-deb10

01:45:22

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x86_64-linux
nightly-x86_64-linux-deb9

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x86_64-linux
nightly-x86_64-linux-deb9-integer-simple

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x86_64-linux
nightly-x86_64-linux-deb9-llvm

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new-x86_64-windows test allowed to fail
nightly-x86_64-windows

00:10:36

failed #285351
aarch64-linux allowed to fail
validate-aarch64-linux-deb9

03:34:49

passed #285353
armv7-linux
validate-armv7-linux-deb9

03:24:52

passed #285355
x86_64-linux
validate-i386-linux-deb9

01:27:52

failed #285370
new-x86_64-windows test allowed to fail
validate-i386-windows

00:00:52

passed #285350
x86_64-darwin
validate-x86_64-darwin

01:09:26

passed #285358
x86_64-linux
validate-x86_64-linux-deb9-debug

01:53:51

passed #285362
x86_64-linux
validate-x86_64-linux-deb9-dwarf

01:10:38

passed #285360
x86_64-linux
validate-x86_64-linux-deb9-integer-simple

01:37:35

passed #285348
x86_64-linux
validate-x86_64-linux-deb9-unreg-hadrian

02:16:16

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x86_64-linux
validate-x86_64-linux-fedora27

00:49:03

failed #285368
new-x86_64-windows test allowed to fail
validate-x86_64-windows

03:13:13

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new-x86_64-windows test allowed to fail
validate-x86_64-windows-hadrian

00:59:53

 
  Cleanup
passed #285372
x86_64-darwin
cleanup-darwin

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  Packaging
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x86_64-linux allowed to fail
doc-tarball
 
  Testing
skipped #285374
x86_64-linux allowed to fail manual
hackage
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x86_64-linux
nightly-hackage
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x86_64-linux
perf-nofib
 
  Deploy
skipped #285377
x86_64-linux allowed to fail
pages
 
Name Stage Failure
failed
validate-aarch64-linux-deb9 Full Build
cd "libraries/unix/tests/fileexist01.run" && ./fileexist01   < 
=====> queryfdoption01(normal) 7374 of 7403 [0, 103, 8]
cd "libraries/unix/tests/queryfdoption01.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o queryfdoption01 queryfdoption01.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 unix<
cd "libraries/unix/tests/forkprocess01.run" && ./forkprocess01 <
=====> forkprocess01(threaded1_ls) 7374 of 7403 [0, 103, 8]
cd "libraries/unix/tests/forkprocess01.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o forkprocess01 forkprocess01.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 -threaded -debug -package unix<
cd "libraries/unix/tests/resourceLimit.run" && ./resourceLimit <
=====> getEnvironment01(normal) 7375 of 7403 [0, 103, 8]
cd "libraries/unix/tests/getEnvironment01.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o getEnvironment01 getEnvironment01.hs -dcore-lint -dstg-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-miss
Job's log exceeded limit of 16384000 bytes.
failed
nightly-x86_64-windows Full Build
Git branch:   12-6-stable
GO version: go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=7464 revision=ac8e767a version=12.6.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
validate-x86_64-windows Full Build
GO version:   go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=6064 revision=ac8e767a version=12.6.0
junit.xml: found 1 matching files

WARNING: Failed to load system CertPool: crypto/x509: system root pool is not available on Windows
Uploading artifacts to coordinator... ok
id=285368 responseStatus=201 Created token=sp5sz7vX
ERROR: Job failed: exit status 1
failed
nightly-x86_64-linux-deb9-llvm Full Build
Uploading artifacts...
WARNING: ./ghc-x86_64-deb9-linux.tar.xz: no matching files
WARNING: junit.xml: no matching files
WARNING: performance-metrics.tsv: no matching files
ERROR: No files to upload
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WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1
failed
nightly-i386-windows-hadrian Full Build
Git branch:   12-6-stable
GO version: go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=652 revision=ac8e767a version=12.6.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
validate-x86_64-windows-hadrian Full Build
Git branch:   12-6-stable
GO version: go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=1408 revision=ac8e767a version=12.6.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
nightly-x86_64-freebsd Full Build
WARNING: ghc-x86_64-portbld-freebsd.tar.xz: no matching files 
WARNING: junit.xml: no matching files
WARNING: performance-metrics.tsv: no matching files
ERROR: No files to upload
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Runtime platform
arch=amd64 os=freebsd pid=38569 revision=58272c27 version=12.7.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
nightly-x86_64-linux-deb9-integer-simple Full Build
Uploading artifacts...
./ghc-x86_64-deb9-linux.tar.xz: found 1 matching files
junit.xml: found 1 matching files

performance-metrics.tsv: found 1 matching files

Uploading artifacts to coordinator... ok
id=285361 responseStatus=201 Created token=RTmLjMfs
Uploading artifacts...
junit.xml: found 1 matching files

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id=285361 responseStatus=201 Created token=RTmLjMfs
ERROR: Job failed: exit code 1
failed
nightly-x86_64-linux-alpine Full Build
Running rm -Rf _build...
Uploading artifacts...
ghc.tar.xz: found 1 matching files
junit.xml: found 1 matching files

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id=285364 responseStatus=201 Created token=u_Cj9aRF
Uploading artifacts...
junit.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=285364 responseStatus=201 Created token=u_Cj9aRF
ERROR: Job failed: exit code 1
failed
nightly-aarch64-linux-deb9 Full Build
cd "libraries/unix/tests/resourceLimit.run" && ./resourceLimit   < 
=====> getEnvironment01(normal) 7375 of 7403 [0, 103, 8]
cd "libraries/unix/tests/getEnvironment01.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o getEnvironment01 getEnvironment01.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 unix<
cd "libraries/unix/tests/user001.run" && ./user001 <
cd "libraries/unix/tests/queryfdoption01.run" && ./queryfdoption01 < queryfdoption01.stdin
=====> getEnvironment02(normal) 7376 of 7403 [0, 103, 8]
cd "libraries/unix/tests/getEnvironment02.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o getEnvironment02 getEnvironment02.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 unix<
=====> getGroupEntryForName(normal) 7377 of 7403 [0, 103, 8]
cd "libraries/unix/tests/getGroupEntryForName.run" && "/builds/ghc/ghc/inplace/bin/ghc-stage2" -o getGroupEntryForName getGroupEntryForName.hs -dcore-lint -dstg-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-missed-specialisations -fshow-warning-groups -fdiagnostics-color=ne
Job's log exceeded limit of 16384000 bytes.
failed
validate-i386-windows Full Build
Git branch:   12-6-stable
GO version: go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=7604 revision=ac8e767a version=12.6.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
nightly-i386-windows Full Build
Git branch:   12-6-stable
GO version: go1.13.4
Built: 2019-12-22T11:55:34+0000
OS/Arch: windows/amd64
Uploading artifacts...
Runtime platform
arch=amd64 os=windows pid=3812 revision=ac8e767a version=12.6.0
WARNING: junit.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1