Enabled stack-use-after-return (Linux/Darwin) and leak-detection (Linux).  
Smoke logs available at 
http://m-l.org/~perl/smoke/perl/linux/blead_clang++_sanitize=address/log393dcb6c04b49721349bf7dc3ca104cf64600045.log.gz

Automated smoke report for branch blead 5.31.5 patch 
393dcb6c04b49721349bf7dc3ca104cf64600045 v5.31.4-282-g393dcb6c04
vier.local: Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz (GenuineIntel 3702MHz) 
(x86_64/1 cpu[8 cores])
    on        linux - 5.2.7-200.fc30.x86_64 [Fedora 30 (Server Edition)]
    using     clang++ version 4.2.1 Compatible Clang 8.0.0 (Fedora 8.0.0-3.fc30)
    smoketime 3 days 22 hours 36 minutes (average 5 hours 54 minutes)

Summary: FAIL(M)

O = OK  F = Failure(s), extended report at the bottom
X = Failure(s) under TEST but not under harness
? = still running or test results not (yet) available
Build failures during:       - = unknown or N/A
c = Configure, m = make, M = make (after miniperl), t = make test-prep

v5.31.4-282-g393dcb6c04  Configuration (common) 
-Accflags="-Werror=declaration-after-statement -g -fno-omit-frame-pointer 
-fsanitize=address  -fno-common -fsanitize-blacklist=`pwd`/asan_ignore" 
-Aldflags="-fsanitize=address" -Dcc=clang++
----------- ---------------------------------------------------------
O O O O O O 
O O O O O O -Accflags=-DPERL_POISON
O O O O O O -Duse64bitall -Accflags=-DPERL_GLOBAL_STRUCT
M - - M - - -Dusemorebits -Accflags=-DPERL_GLOBAL_STRUCT_PRIVATE
O O O O O O -Duseithreads
O O O O O O -Duseithreads -Accflags=-DPERL_POISON
O O O O O O -Duseithreads -Duse64bitall -Accflags=-DPERL_GLOBAL_STRUCT
M - - M - - -Duseithreads -Dusemorebits -Accflags=-DPERL_GLOBAL_STRUCT_PRIVATE
| | | | | +- LC_ALL = en_US.utf8 -DDEBUGGING
| | | | +--- PERLIO = perlio -DDEBUGGING
| | | +----- PERLIO = stdio  -DDEBUGGING
| | +------- LC_ALL = en_US.utf8
| +--------- PERLIO = perlio
+----------- PERLIO = stdio 

Locally applied patches:
    SMOKE393dcb6c04b49721349bf7dc3ca104cf64600045

Compiler messages(gcc):
op.c:3018:5: warning: unused typedef '_static_assertion_failed_3019' 
[-Wunused-local-typedef]
./perl.h:3638:52: note: expanded from macro 'STATIC_ASSERT_STMT'
./perl.h:3633:39: note: expanded from macro 'STATIC_ASSERT_DECL'
./perl.h:3632:41: note: expanded from macro 'STATIC_ASSERT_1'
./perl.h:3631:7: note: expanded from macro 'STATIC_ASSERT_2'
<scratch space>:96:1: note: expanded from here
op.c:3020:5: warning: unused typedef '_static_assertion_failed_3021' 
[-Wunused-local-typedef]
<scratch space>:99:1: note: expanded from here
op.c:16205:21: warning: unused typedef '_static_assertion_failed_16205' 
[-Wunused-local-typedef]
<scratch space>:117:1: note: expanded from here
toke.c:783:5: warning: unused typedef '_static_assertion_failed_784' 
[-Wunused-local-typedef]
<scratch space>:89:1: note: expanded from here
regcomp.c:14746:43: warning: result of comparison of constant 223 with 
expression of type 'char' is always false 
[-Wtautological-constant-out-of-range-compare]
./perl.h:3599:58: note: expanded from macro 'UNLIKELY'
./handy.h:111:24: note: expanded from macro 'cBOOL'
./perl.h:3578:62: note: expanded from macro 'EXPECT'
regcomp.c:15225:5: warning: unused typedef '_static_assertion_failed_15225' 
[-Wunused-local-typedef]
<scratch space>:313:1: note: expanded from here
regcomp.c:19523:21: warning: unused typedef '_static_assertion_failed_19523' 
[-Wunused-local-typedef]
regcomp.c:19524:21: warning: unused typedef '_static_assertion_failed_19524' 
[-Wunused-local-typedef]
<scratch space>:102:1: note: expanded from here
pp_hot.c:1188:9: warning: unused typedef '_static_assertion_failed_1188' 
[-Wunused-local-typedef]
<scratch space>:104:1: note: expanded from here
sv.c:12540:41: warning: adding 'int' to a string does not append to the string 
[-Wstring-plus-int]
./handy.h:538:37: note: expanded from macro 'strnEQ'
sv.c:12540:41: note: use array indexing to silence this warning
sv.c:1287:2: warning: unused typedef '_static_assertion_failed_1287' 
[-Wunused-local-typedef]
sv.c:1288:2: warning: unused typedef '_static_assertion_failed_1288' 
[-Wunused-local-typedef]
<scratch space>:92:1: note: expanded from here
sv.c:4254:5: warning: unused typedef '_static_assertion_failed_4254' 
[-Wunused-local-typedef]
<scratch space>:115:1: note: expanded from here
sv.c:4255:5: warning: unused typedef '_static_assertion_failed_4255' 
[-Wunused-local-typedef]
<scratch space>:118:1: note: expanded from here
sv.c:4340:3: warning: unused typedef '_static_assertion_failed_4340' 
[-Wunused-local-typedef]
<scratch space>:121:1: note: expanded from here
sv.c:9664:5: warning: unused typedef '_static_assertion_failed_9664' 
[-Wunused-local-typedef]
<scratch space>:126:1: note: expanded from here
sv.c:9703:5: warning: unused typedef '_static_assertion_failed_9703' 
[-Wunused-local-typedef]
<scratch space>:129:1: note: expanded from here
sv.c:9758:5: warning: unused typedef '_static_assertion_failed_9758' 
[-Wunused-local-typedef]
<scratch space>:132:1: note: expanded from here
pp.c:3121:5: warning: unused typedef '_static_assertion_failed_3121' 
[-Wunused-local-typedef]
<scratch space>:175:1: note: expanded from here
pp_sys.c:527:5: warning: unused typedef '_static_assertion_failed_527' 
[-Wunused-local-typedef]
pp_sys.c:528:5: warning: unused typedef '_static_assertion_failed_528' 
[-Wunused-local-typedef]
<scratch space>:107:1: note: expanded from here
pp_sys.c:529:5: warning: unused typedef '_static_assertion_failed_529' 
[-Wunused-local-typedef]
<scratch space>:110:1: note: expanded from here
locale.c:1740:27: warning: array subscript is of type 'char' [-Wchar-subscripts]
locale.c:1741:27: warning: array subscript is of type 'char' [-Wchar-subscripts]
DynaLoader.c:535:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
../../XSUB.h:134:29: note: expanded from macro 'XS_EXTERNAL'
B.c:3518:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
deflate.c:1240:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:1241:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:1242:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:1261:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:1262:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:1263:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
deflate.c:54:12: warning: unused variable 'deflate_copyright' 
[-Wunused-const-variable]
compress.c:190:13: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
compress.c:191:13: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
compress.c:192:13: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
compress.c:198:16: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
compress.c:360:13: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
compress.c:361:13: warning: 'register' storage class specifier is deprecated 
and incompatible with C++17 [-Wdeprecated-register]
Cwd.c:1079:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
inftrees.c:11:12: warning: unused variable 'inflate_copyright' 
[-Wunused-const-variable]
trees.c:1164:5: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
Zlib.c:3713:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Dumper.c:1930:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Bzip2.c:1669:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
MD5.c:1094:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Peek.c:840:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
SHA.c:723:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
RealPPPort.c:6610:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Fcntl.c:316:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Encode.c:1356:5: warning: unused variable 'ix' [-Wunused-variable]
../../XSUB.h:185:20: note: expanded from macro 'dXSI32'
Encode.c:1398:5: warning: unused variable 'ix' [-Wunused-variable]
Encode.c:1579:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
DosGlob.c:208:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Call.c:464:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Byte.c:187:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
../../../XSUB.h:134:29: note: expanded from macro 'XS_EXTERNAL'
Glob.c:706:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Util.c:720:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
FieldHash.c:718:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Langinfo.c:313:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
IO.c:991:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
SysV.c:829:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
SysV.xs:82:20: warning: unused variable 's_sysv_unimpl' [-Wunused-variable]
CN.c:192:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Base64.xs:189:2: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
Base64.xs:285:2: warning: 'register' storage class specifier is deprecated and 
incompatible with C++17 [-Wdeprecated-register]
Base64.c:728:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ListUtil.c:2184:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
EBCDIC.c:187:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Opcode.c:867:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
encoding.c:792:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
POSIX.c:5603:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
mmap.c:449:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
scalar.c:601:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
via.c:843:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
SDBM_File.c:583:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
JP.c:193:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Socket.c:1848:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
./const-xs.inc:131:42: warning: AI_IDN_ALLOW_UNASSIGNED is deprecated 
[-W#pragma-messages]
/usr/include/netdb.h:609:3: note: expanded from macro 'AI_IDN_ALLOW_UNASSIGNED'
/usr/include/sys/cdefs.h:503:3: note: expanded from macro 
'__glibc_macro_warning'
/usr/include/sys/cdefs.h:501:42: note: expanded from macro 
'__glibc_macro_warning1'
<scratch space>:107:6: note: expanded from here
./const-xs.inc:134:46: warning: AI_IDN_USE_STD3_ASCII_RULES is deprecated 
[-W#pragma-messages]
/usr/include/netdb.h:611:3: note: expanded from macro 
'AI_IDN_USE_STD3_ASCII_RULES'
<scratch space>:110:6: note: expanded from here
./const-xs.inc:386:42: warning: NI_IDN_ALLOW_UNASSIGNED is deprecated 
[-W#pragma-messages]
/usr/include/netdb.h:650:3: note: expanded from macro 'NI_IDN_ALLOW_UNASSIGNED'
<scratch space>:113:6: note: expanded from here
./const-xs.inc:389:46: warning: NI_IDN_USE_STD3_ASCII_RULES is deprecated 
[-W#pragma-messages]
/usr/include/netdb.h:652:3: note: expanded from macro 
'NI_IDN_USE_STD3_ASCII_RULES'
<scratch space>:116:6: note: expanded from here
Storable.c:8153:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
KR.c:191:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Hostname.c:243:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Symbol.c:187:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Syslog.c:532:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
NamedCapture.c:350:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Piece.c:1424:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
TW.c:190:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Collate.c:1048:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Unicode.c:704:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Typemap.c:1919:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
HiRes.c:2370:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
attributes.c:465:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
APItest.c:3273:2: warning: 'Perl_ptr_table_clear' is deprecated 
[-Wdeprecated-declarations]
../../embed.h:540:28: note: expanded from macro 'ptr_table_clear'
../../proto.h:2928:4: note: 'Perl_ptr_table_clear' has been explicitly marked 
deprecated here
../../perl.h:3506:60: note: expanded from macro '__attribute__deprecated__'
mro.c:928:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
APItest.c:13140:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
XSUB-undef-XS_VERSION.c:194:1: warning: duplicate 'extern' declaration 
specifier [-Wduplicate-decl-specifier]
XSUB-redefined-macros.c:216:1: warning: duplicate 'extern' declaration 
specifier [-Wduplicate-decl-specifier]
threads.c:2193:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
shared.c:2147:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
FastCalc.c:628:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
re_comp.c:14746:43: warning: result of comparison of constant 223 with 
expression of type 'char' is always false 
[-Wtautological-constant-out-of-range-compare]
../../perl.h:3599:58: note: expanded from macro 'UNLIKELY'
../../handy.h:111:24: note: expanded from macro 'cBOOL'
../../perl.h:3578:62: note: expanded from macro 'EXPECT'
re.c:304:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
Normalize.c:1289:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
XSTest.c:340:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
/home/perl/smoke/perl/blead_clang++_sanitize=address/build/XSUB.h:134:29: note: 
expanded from macro 'XS_EXTERNAL'
XSMore.c:525:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
XSUsage.c:301:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:660:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
../../../../XSUB.h:134:29: note: expanded from macro 'XS_EXTERNAL'
ExtTest.c:356:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:442:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:376:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:460:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:441:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]
ExtTest.c:417:1: warning: duplicate 'extern' declaration specifier 
[-Wduplicate-decl-specifier]

Non-Fatal messages(gcc):

-- 
Report by Test::Smoke v1.72 running on perl 5.28.2
(Reporter v0.053 / Smoker v0.046)

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