-- running on worker skyleaf thread 1, build number 172604.
make: Entering directory '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/tests/net/slip'
rm -rf /tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/pkg-build/cmsis
rm -rf /tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/pkg-build/mpaland-printf
make: Leaving directory '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/tests/net/slip'
make: Entering directory '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/tests/net/slip'
Building application "tests_slip" for "samr21-xpro" with CPU "samd21".

Cloning into '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/pkg/cmsis'...
done.
HEAD is now at 2b7495b85 Merge branch 'develop'
Cloning into '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/pkg/mpaland-printf'...
done.
HEAD is now at 0dd4b64 test(test_suite): added support for PRINTF_DISABLE_SUPPORT_EXPONENTIAL
slipmux.c:259:45: error: invalid conversion specifier 'b' [-Werror,-Wformat-invalid-specifier]
        DEBUG("slipmux: Unknown start byte %b ignored\n", byte);
                                           ~^
../../core/lib/include/debug.h:121:57: note: expanded from macro 'DEBUG'
#define DEBUG(...) do { if (ENABLE_DEBUG) { DEBUG_PRINT(__VA_ARGS__); } } while (0)
                                                        ^~~~~~~~~~~
../../core/lib/include/debug.h:48:20: note: expanded from macro 'DEBUG_PRINT'
            printf(__VA_ARGS__); \
                   ^~~~~~~~~~~
1 error generated.
make[3]: *** [/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/Makefile.base:157: /tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/slipmux_dev/slipmux.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/Makefile.base:31: ALL--/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/drivers/slipmux_dev] Error 2
make[1]: *** [/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/Makefile.base:31: ALL--/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/drivers] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/tests/net/slip/../../../Makefile.include:743: application_tests_slip.module] Error 2
make: Leaving directory '/tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/tests/net/slip'
cat: /tmp/dwq.0.5873192833037104/a7cccb048b94b4f2a21f044cce4fcafb/build/test-input-hash.sha1: No such file or directory
{"build/": 7896}