#0  __GI_getenv (name=name@entry=0x7f55ea11b12c "FONTCONFIG_SYSROOT") at getenv.c:31
        ep = 0x55f15d21f238
        len = 18
#1  0x00007f55ea0f0257 in IA__FcConfigCreate () at ../fontconfig/src/fccfg.c:200
        set = (unknown: 0x2)
        config = 0x55f15d4b37a0
        k = FcMatchKindEnd
        err = 0
#2  0x00007f55ea0fc1d5 in FcInitLoadOwnConfig (config=0x0) at ../fontconfig/src/fcinit.c:82
#3  0x00007f55ea0f715d in FcInitLoadOwnConfigAndFonts (config=0x0) at ../fontconfig/src/fcinit.c:170
        config = <optimized out>
#4  IA__FcInitLoadConfigAndFonts () at ../fontconfig/src/fcinit.c:184
        config = <optimized out>
#5  FcConfigEnsure () at ../fontconfig/src/fccfg.c:96
        config = <optimized out>
#6  0x00007f55ea0fc48d in FcConfigInit () at ../fontconfig/src/fccfg.c:122
#7  IA__FcInit () at ../fontconfig/src/fcinit.c:193
#8  0x00007f55ea13e412 in init_in_thread (task_data=<optimized out>) at ../pango/pango/pangofc-fontmap.c:1369
#9  0x00007f55ed3669a5 in g_thread_proxy (data=0x55f15d505000) at ../glib/glib/gthread.c:831
        thread = 0x55f15d505000
        __func__ = "g_thread_proxy"
#10 0x00007f55ecaaa9eb in start_thread (arg=<optimized out>) at pthread_create.c:444
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140007019554576, 4472423351473050783, -120, 11, 140723383244720, 140006756007936, -4559182423501925217, -4559080971993705313}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#11 0x00007f55ecb2e7cc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78