Bug#925781: mozjs52: ftbfs with GCC-9

[Simon McVittie]

On Wed, 27 Mar 2019 at 19:47:11 +0000, Matthias Klose wrote:
> The last lines of the build log

... don't look particularly relevant. The error seems to be:

/<<PKGBUILDDIR>>/js/src/jsapi-tests/testPrintf.cpp: In member function 'virtual bool cls_testPrintf::run(JS::HandleObject)':
/<<PKGBUILDDIR>>/js/src/jsapi-tests/testPrintf.cpp:58:20: error: '%s' directive argument is null [-Werror=format-overflow=]
   58 |     CHECK(print_one("(null)", "%s", zero()));

    smcv