Re: 2.17.6: assertion failed with \glissando

[Werner LEMBERG]

>   ../flower/include/interval.hh:226:
>     T Interval_t<T>::center() const [with T = double]:
>     Assertion `!is_empty ()' failed.

BTW, here is a full backtrace (of the first 32 frames).


    Werner

======================================================================

#0  Interval_t<double>::center (this=0xbfff96ec) at 
../flower/include/interval.hh:226
        __PRETTY_FUNCTION__ = "T Interval_t<T>::center() const [with T = 
double]"
#1  0x082d9cdd in Note_head::get_stem_attachment (fm=0x8602ec8, key=...) at 
note-head.cc:181
        a = X_AXIS
        v = {<Drul_array<double>> = {array_ = {-0, 1.3899839999999997}}, <No 
data fields>}
        i = 0
        b = {interval_a_ = {{<Drul_array<double>> = {array_ = {-0, 
1.3899839999999997}}, <No data fields>}, 
    {<Drul_array<double>> = {array_ = {-0.55000599999999999, 
0.55000599999999999}}, <No data fields>}}, 
          static smob_name_ = 0x8399944 "Box", static smob_tag_ = 14975}
        wxwy = {coordinate_a_ = {1.3899839999999997, 0.26138599999999995}}
        att = {coordinate_a_ = {0, 0}}
        k = 148
#2  0x082da14d in Note_head::calc_stem_attachment (smob=0xb74924d8) at 
note-head.cc:198
        me = 0x8623b10
        fm = 0x8602ec8
        key = {static npos = <optimized out>, _M_dataplus = 
{<std::allocator<char>> = 
    {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
_M_p = 
    0x879cd5c "noteheads.s1"}}
#3  0xb7ee8660 in scm_dapply () from /usr/lib/libguile.so.17
No symbol table info available.
#4  0xb7eef068 in scm_apply () from /usr/lib/libguile.so.17
No symbol table info available.
#5  0xb7ef0900 in scm_call_1 () from /usr/lib/libguile.so.17
No symbol table info available.
#6  0x082a9987 in Grob::try_callback_on_alist (this=0x8623b10, alist=0x8623b40, 
sym=0xb5a963b0, proc=
    0xb77070a8) at grob-property.cc:231
        marker = 0xb6bf3480
        value = 0x404
        __PRETTY_FUNCTION__ = 
    "scm_unused_struct* Grob::try_callback_on_alist(scm_unused_struct**, SCM, 
SCM)"
#7  0x082a96de in Grob::internal_get_property (this=0x8623b10, sym=0xb5a963b0) 
at grob-property.cc:188
        me = 0x8623b10
        val = 0xb77070a8
#8  0x082d9b11 in Note_head::stem_attachment_coordinate (me=0x8623b10, 
a=Y_AXIS) at note-head.cc:159
        off = {coordinate_a_ = {-1.3400601133086569e-44, 
-1.3405732501115224e-44}}
#9  0x0825d3d0 in Stem::internal_calc_stem_begin_position (me=0x8606d88, 
calc_beam=false) at stem.cc:796
        head_height = {<Drul_array<double>> = {array_ = {-0.55000599999999999, 
    0.55000599999999999}}, <No data fields>}
        y_attach = -4.7065355469339064e-39
        head = 0x8623b10
        ss = 1
        lh = 0x8623b10
        beam = 0x0
        d = UP
        pos = -10
#10 0x0825d24b in Stem::pure_calc_stem_begin_position (smob=0xb7491aa8) at 
stem.cc:771
        me = 0x8606d88
#11 0xb7ee8ac3 in scm_dapply () from /usr/lib/libguile.so.17
No symbol table info available.
#12 0xb7eebed2 in ?? () from /usr/lib/libguile.so.17
No symbol table info available.
#13 0xb7ee8c34 in scm_dapply () from /usr/lib/libguile.so.17
No symbol table info available.
#14 0xb7eef068 in scm_apply () from /usr/lib/libguile.so.17
No symbol table info available.
#15 0xb7ef012b in scm_apply_0 () from /usr/lib/libguile.so.17
No symbol table info available.
#16 0x082a9d5c in call_pure_function (unpure=0xb76dd070, args=0xb7333848, 
start=0, end=2147483647)
    at grob-property.cc:327
        scm_call_pure_function = 0xb7330b30
#17 0x082a97e8 in Grob::internal_get_pure_property (this=0x8606d88, 
sym=0xb5a98ba0, start=0, end=2147483647)
    at grob-property.cc:200
        val = 0xb76dd070
#18 0x0825c46e in Stem::internal_height (me=0x8606d88, calc_beam=false) at 
stem.cc:715
        dir = UP
        y1 = -2.8795894772376809e-39
        half_space = 2.5184017124442584e-269
        beam = 0x0
        y2 = 1.4256976560526131e-313
        stem_y = {<Drul_array<double>> = {array_ = {-9.8251428758056448e-41, 
    1.5245774301310824e-314}}, <No data fields>}
#19 0x08258dee in Stem::internal_pure_height (me=0x8606d88, calc_beam=true) at 
stem.cc:313
        beam = 0x0
        iv = {<Drul_array<double>> = {array_ = {6.1515172583029569e-309, 
    -9.8888146541592614e-41}}, <No data fields>}
#20 0x08258cd9 in Stem::pure_height (smob=0xb7491aa8) at stem.cc:302
        me = 0x8606d88
#21 0xb7ee8ac3 in scm_dapply () from /usr/lib/libguile.so.17
No symbol table info available.
#22 0xb7eebed2 in ?? () from /usr/lib/libguile.so.17
No symbol table info available.
#23 0xb7ee8c34 in scm_dapply () from /usr/lib/libguile.so.17
No symbol table info available.
#24 0xb7eef068 in scm_apply () from /usr/lib/libguile.so.17
No symbol table info available.
#25 0xb7ef012b in scm_apply_0 () from /usr/lib/libguile.so.17
No symbol table info available.
#26 0x082a9d5c in call_pure_function (unpure=0xb76dc5f0, args=0xb7333a40, 
start=0, end=4)
    at grob-property.cc:327
        scm_call_pure_function = 0xb7330b30
#27 0x082a97e8 in Grob::internal_get_pure_property (this=0x8606d88, 
sym=0xb6d32040, start=0, end=4)
    at grob-property.cc:200
        val = 0xb76dc5f0
#28 0x08066ae2 in Grob::pure_height (this=0x8606d88, refp=0x8606d88, start=0, 
end=4) at grob.cc:487
        iv_scm = 0xb7f99ff4
        iv = {<Drul_array<double>> = {array_ = {-1.3403337703934991e-44, 
    2.1914304053055682e-314}}, <No data fields>}
        offset = 1.3944200227846405e-269
        min_ext = 0x82a96de
#29 0x081d80c4 in Item::pure_height (this=0x8606d88, g=0x860ef40, start=0, 
end=4) at item.cc:242
No locals.
#30 0x08323f31 in Axis_group_interface::relative_pure_height (me=0x860ef40, 
start=0, end=4)
    at axis-group-interface.cc:344
        dims = {<Drul_array<double>> = {array_ = {-5.5500059999999998, 
    -4.4499940000000002}}, <No data fields>}
        g = 0x8606d88
        rank_span = {<Drul_array<int>> = {array_ = {1, 1}}, <No data fields>}
        i = 1
        p = 0x862a758
        common = 0x860ef40
        elts = @0x879e0a0
        r = {<Drul_array<double>> = {array_ = {-5.5500059999999998, 
-4.4499940000000002}}, <No data fields>}
#31 0x08326f46 in Axis_group_interface::pure_group_height (me=0x860ef40, 
start=0, end=4)
    at axis-group-interface.cc:562
        common = 0x860ef40
        my_coord = 0
        r = {<Drul_array<double>> = {array_ = {4.4501248335597901e-269, 
    -1.9770622565547029}}, <No data fields>}
#32 0x08324bf0 in Axis_group_interface::pure_height (smob=0xb7491420, 
start_scm=0x2, end_scm=0x12)
    at axis-group-interface.cc:387
        start = 0
        end = 4
        me = 0x860ef40
        system = 0x0
[...]