From @coke

$ make test
...
t/04-nativecall/02-simple-args.t ..... Dubious, test returned 2 (wstat
512, 0x200)
Failed 2/12 subtests
...

$ ./perl6 t/04-nativecall/02-simple-args.t
1..12
ok 1 - passed int 42
ok 2 - passed two shorts
ok 3 - passed an int32, int16 and int8
ok 4 - passed a double
ok 5 - passed a float
ok 6 - passed a string
ok 7 - checked previously passed string
ok 8 - wrapped sub
ok 9 - passed int64 0xFFFFFFFFFF
not ok 10 - passed uint8 0xFE

# Failed test 'passed uint8 0xFE'
# at t/04-nativecall/02-simple-args.t line 50
# expected​: '10'
# got​: '0'
not ok 11 - passed uint8 0xFFFE

# Failed test 'passed uint8 0xFFFE'
# at t/04-nativecall/02-simple-args.t line 51
# expected​: '11'
# got​: '0'
ok 12 - passed uint8 0xFFFFFFFE
# Looks like you failed 2 tests of 12

$ sw_vers
ProductName​: Mac OS X
ProductVersion​: 10.10.3
BuildVersion​: 14D136

$ gcc --version
Configured with​:
--prefix=/Applications/Xcode.app/Contents/Developer/usr
--with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
Target​: x86_64-apple-darwin14.3.0
Thread model​: posix

--
Will "Coke" Coleda

From @Util

Also encountered as only `make test` failure on OS X Mavericks.

$ sw_vers
ProductName​: Mac OS X
ProductVersion​: 10.9.5
BuildVersion​: 13F1077

gcc --version
Configured with​: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
Target​: x86_64-apple-darwin13.4.0
Thread model​: posix

bg​:~/Perl/Parrot/Git/Rakudo/rakudo $ install/bin/perl6-m t/04-nativecall/02-simple-args.t
1..12
ok 1 - passed int 42
ok 2 - passed two shorts
ok 3 - passed an int32, int16 and int8
ok 4 - passed a double
ok 5 - passed a float
ok 6 - passed a string
ok 7 - checked previously passed string
ok 8 - wrapped sub
ok 9 - passed int64 0xFFFFFFFFFF
not ok 10 - passed uint8 0xFE

# Failed test 'passed uint8 0xFE'
# at t/04-nativecall/02-simple-args.t line 50
# expected​: '10'
# got​: '0'
not ok 11 - passed uint8 0xFFFE

# Failed test 'passed uint8 0xFFFE'
# at t/04-nativecall/02-simple-args.t line 51
# expected​: '11'
# got​: '0'
ok 12 - passed uint8 0xFFFFFFFE
# Looks like you failed 2 tests of 12

From @coke

Current failure modes​:

$ prove -v -e ./perl6 t/04-nativecall/16-rt125408.t t/04-nativecall/11-cpp.t t/04-nativecall/13-cpp-mangling.t
t/04-nativecall/16-rt125408.t ......
1..1
not ok 1 - RT#​125408 stayed fixed

# Failed test 'RT#​125408 stayed fixed'
# at t/04-nativecall/16-rt125408.t line 15
# Wrong kind of access to numeric CArray
# Looks like you failed 1 test of 1
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests
t/04-nativecall/11-cpp.t ...........
1..21
Don't know how to mangle symbol 'SizeofDerived1' for library './11-cpp.dylib'
  in sub guess-name-mangler at lib/NativeCall.pm​:207
  in method CALL-ME at lib/NativeCall.pm​:222
  in block <unit> at t/04-nativecall/11-cpp.t​:50

# Looks like you planned 21 tests, but ran 0
Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 21/21 subtests
t/04-nativecall/13-cpp-mangling.t ..
1..20
Don't know how to mangle symbol 'Foo​::new' for library './13-cpp-mangling.dylib'
  in sub guess-name-mangler at lib/NativeCall.pm​:200
  in method CALL-ME at lib/NativeCall.pm​:222
  in block <unit> at t/04-nativecall/13-cpp-mangling.t​:49

# Looks like you planned 20 tests, but ran 0
Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 20/20 subtests

Test Summary Report

t/04-nativecall/16-rt125408.t (Wstat​: 256 Tests​: 1 Failed​: 1)
  Failed test​: 1
  Non-zero exit status​: 1
t/04-nativecall/11-cpp.t (Wstat​: 65280 Tests​: 0 Failed​: 0)
  Non-zero exit status​: 255
  Parse errors​: Bad plan. You planned 21 tests but ran 0.
t/04-nativecall/13-cpp-mangling.t (Wstat​: 65280 Tests​: 0 Failed​: 0)
  Non-zero exit status​: 255
  Parse errors​: Bad plan. You planned 20 tests but ran 0.
Files=3, Tests=1, 4 wallclock secs ( 0.02 usr 0.01 sys + 4.27 cusr 0.33 csys = 4.63 CPU)
Result​: FAIL

--
Will "Coke" Coleda

From @coke

On Wed Sep 16 10​:47​:50 2015, coke wrote​:

Current failure modes​:

$ prove -v -e ./perl6 t/04-nativecall/16-rt125408.t t/04-
nativecall/11-cpp.t t/04-nativecall/13-cpp-mangling.t
t/04-nativecall/16-rt125408.t ......
1..1
not ok 1 - RT#​125408 stayed fixed

# Failed test 'RT#​125408 stayed fixed'
# at t/04-nativecall/16-rt125408.t line 15
# Wrong kind of access to numeric CArray
# Looks like you failed 1 test of 1
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests
t/04-nativecall/11-cpp.t ...........
1..21
Don't know how to mangle symbol 'SizeofDerived1' for library './11-
cpp.dylib'
in sub guess-name-mangler at lib/NativeCall.pm​:207
in method CALL-ME at lib/NativeCall.pm​:222
in block <unit> at t/04-nativecall/11-cpp.t​:50

# Looks like you planned 21 tests, but ran 0
Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 21/21 subtests
t/04-nativecall/13-cpp-mangling.t ..
1..20
Don't know how to mangle symbol 'Foo​::new' for library './13-cpp-
mangling.dylib'
in sub guess-name-mangler at lib/NativeCall.pm​:200
in method CALL-ME at lib/NativeCall.pm​:222
in block <unit> at t/04-nativecall/13-cpp-mangling.t​:49

# Looks like you planned 20 tests, but ran 0
Dubious, test returned 255 (wstat 65280, 0xff00)
Failed 20/20 subtests

Test Summary Report
-------------------
t/04-nativecall/16-rt125408.t (Wstat​: 256 Tests​: 1 Failed​: 1)
Failed test​: 1
Non-zero exit status​: 1
t/04-nativecall/11-cpp.t (Wstat​: 65280 Tests​: 0 Failed​: 0)
Non-zero exit status​: 255
Parse errors​: Bad plan. You planned 21 tests but ran 0.
t/04-nativecall/13-cpp-mangling.t (Wstat​: 65280 Tests​: 0 Failed​: 0)
Non-zero exit status​: 255
Parse errors​: Bad plan. You planned 20 tests but ran 0.
Files=3, Tests=1, 4 wallclock secs ( 0.02 usr 0.01 sys + 4.27 cusr
0.33 csys = 4.63 CPU)
Result​: FAIL

Double checked after a chat with FROGGS++

The only test still failing now is 16-rt125408.t, which has its own ticket.

Resolving.
--
Will "Coke" Coleda

@coke - Status changed from 'new' to 'resolved'