font rendering crash

[andrewrk]

seems to be a sporadic failure. current sha1: 89e2ba0

gdb session:

andy@andy-bx:~/dev/genesis/build$ make && gdb ./genesis -ex run -ex quit 
[ 13%] Built target libgenesis_shared
[ 14%] Built target delay
[ 18%] Built target generate_unicode_data
Scanning dependencies of target genesis
[ 19%] Building CXX object CMakeFiles/genesis.dir/src/genesis_editor.cpp.o
Linking CXX executable genesis
[ 60%] Built target genesis
[ 74%] Built target libgenesis_static
[ 75%] Built target list_devices
[ 77%] Built target list_supported_formats
[ 78%] Built target normalize_audio
[ 79%] Built target play
[ 79%] Built target rucksack_bundle
[ 80%] Built target synth
[100%] Built target unit_tests
GNU gdb (Ubuntu 7.9-1ubuntu1) 7.9
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Reading symbols from ./genesis...done.
Starting program: /home/andy/dev/genesis/build/genesis 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffde560700 (LWP 13578)]
[New Thread 0x7fffded61700 (LWP 13577)]
[New Thread 0x7fffe4f50700 (LWP 13576)]
[New Thread 0x7fffe9752700 (LWP 13575)]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000427598 in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::key_to_index (
    this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:221
221         return (int)(HashFunction(key) % ((uint32_t)_capacity));
A debugging session is active.

    Inferior 1 [process 13571] will be killed.

Quit anyway? (y or n) n
Not confirmed.
(gdb) up
#1  0x00000000004272d1 in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::internal_get
    (this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:206
206         int start_index = key_to_index(key);
(gdb) 
#2  0x00000000004270bb in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::maybe_get (
    this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:70
70          return internal_get(key);
(gdb) 
#3  0x0000000000426c92 in FontSize::font_cache_entry (this=0x1, codepoint=85)
    at /home/andy/dev/genesis/src/font_size.cpp:38
38      auto *entry = _font_cache.maybe_get(codepoint);
(gdb) 
#4  0x0000000000421e5e in Label::update (this=0x791118) at /home/andy/dev/genesis/src/label.cpp:112
112         FontCacheValue entry = _font_size->font_cache_entry(ch);
(gdb) 
#5  0x000000000043406c in MenuWidgetItem::set_caption (this=0x791110, caption=..., new_mnemonic_index=0)
    at /home/andy/dev/genesis/src/menu_widget.cpp:68
68      label.update();
(gdb) 
#6  0x0000000000434010 in MenuWidgetItem::set_caption (this=0x791110, orig_caption=...)
    at /home/andy/dev/genesis/src/menu_widget.cpp:63
63      return set_caption(caption, mnemonic_index);
(gdb) 
#7  0x000000000042c851 in GenesisEditor::refresh_menu_state (this=0x75a8c0)
    at /home/andy/dev/genesis/src/genesis_editor.cpp:251
251         editor_window->undo_menu->set_caption(undo_caption);
(gdb) print undo_caption
$1 = {static max_codepoint = 2097151, _chars = {_items = 0xd335a0, _length = 5, _capacity = 16}}
(gdb) print undo_caption.encode()
$2 = {_buffer = {_items = 0xa762f0 "&Undo", _length = 6, _capacity = 16}}
(gdb) down
#6  0x0000000000434010 in MenuWidgetItem::set_caption (this=0x791110, orig_caption=...)
    at /home/andy/dev/genesis/src/menu_widget.cpp:63
63      return set_caption(caption, mnemonic_index);
(gdb) 
#5  0x000000000043406c in MenuWidgetItem::set_caption (this=0x791110, caption=..., new_mnemonic_index=0)
    at /home/andy/dev/genesis/src/menu_widget.cpp:68
68      label.update();
(gdb) 
#4  0x0000000000421e5e in Label::update (this=0x791118) at /home/andy/dev/genesis/src/label.cpp:112
112         FontCacheValue entry = _font_size->font_cache_entry(ch);
(gdb) 
#3  0x0000000000426c92 in FontSize::font_cache_entry (this=0x1, codepoint=85)
    at /home/andy/dev/genesis/src/font_size.cpp:38
38      auto *entry = _font_cache.maybe_get(codepoint);
(gdb) 
#2  0x00000000004270bb in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::maybe_get (
    this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:70
70          return internal_get(key);
(gdb) 
#1  0x00000000004272d1 in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::internal_get
    (this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:206
206         int start_index = key_to_index(key);
(gdb) 
#0  0x0000000000427598 in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::key_to_index
    (this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:221
221         return (int)(HashFunction(key) % ((uint32_t)_capacity));
(gdb) 
Bottom (innermost) frame selected; you cannot go down.
(gdb) up
#1  0x00000000004272d1 in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::internal_get
    (this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:206
206         int start_index = key_to_index(key);
(gdb) print key
$3 = (const unsigned int &) @0x7fffffffda3c: 85
(gdb) up
#2  0x00000000004270bb in HashMap<unsigned int, FontCacheValue, &(hash_uint32_t(unsigned int const&))>::maybe_get (
    this=0x9, key=@0x7fffffffda3c: 85) at /home/andy/dev/genesis/src/hash_map.hpp:70
70          return internal_get(key);
(gdb) up
#3  0x0000000000426c92 in FontSize::font_cache_entry (this=0x1, codepoint=85)
    at /home/andy/dev/genesis/src/font_size.cpp:38
38      auto *entry = _font_cache.maybe_get(codepoint);
(gdb) print codeponit
No symbol "codeponit" in current context.
(gdb) print codepoint
$4 = 85
(gdb) print _font_cache 
Cannot access memory at address 0x9
(gdb) print *this
Cannot access memory at address 0x1
(gdb) up
#4  0x0000000000421e5e in Label::update (this=0x791118) at /home/andy/dev/genesis/src/label.cpp:112
112         FontCacheValue entry = _font_size->font_cache_entry(ch);
(gdb) print *this
$5 = {_gui = 0x100003503, _width = 0, _height = 0, _texture_id = 0, _vertex_buffer = 0, _text = {
    static max_codepoint = 2097151, _chars = {_items = 0xd769a0, _length = 4, _capacity = 16}}, _font_size = 0x1, 
  _img_buffer = {_buffer = {_items = 0xaf7b50 "\240e{", _length = 2, _capacity = 16}}, _letters = {_items = 0x0, 
    _length = 0, _capacity = 0}}
(gdb) quit
A debugging session is active.

    Inferior 1 [process 13571] will be killed.

Quit anyway? (y or n) y

[andrewrk]

oops, spoke too soon. this is a bug I caused while developing locally.

[andrewrk]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000427a8a in HashMap<int, FontSize*, &(hash_int(int const&))>::key_to_index (this=0x100000028000150, 
    key=@0x7fffffffda74: 12) at /home/andy/dev/genesis/src/hash_map.hpp:221
    key=@0x7fffffffda74: 12) at /home/andy/dev/genesis/src/hash_map.hpp:70
#3  0x00000000004264b4 in Gui::get_font_size (this=0x100000028000000, font_size=12)
    at /home/andy/dev/genesis/src/gui.cpp:134
#4  0x0000000000428ae9 in Label::set_font_size (this=0x77bd40, size=12) at /home/andy/dev/genesis/src/label.cpp:240
#5  0x0000000000427bda in Label::Label (this=0x77bd40, gui=0x100000028000000)
    at /home/andy/dev/genesis/src/label.cpp:17
#6  0x0000000000446247 in create<Label, Gui*> () at /home/andy/dev/genesis/src/util.hpp:21
#7  0x0000000000445ba9 in TrackEditorWidget::create_gui_track (this=0x20a3070)
    at /home/andy/dev/genesis/src/track_editor_widget.cpp:155
#8  0x0000000000445854 in TrackEditorWidget::update_model (this=0x20a3070)
    at /home/andy/dev/genesis/src/track_editor_widget.cpp:119
#9  0x0000000000444f9a in on_tracks_changed (userdata=0x20a3070)
    at /home/andy/dev/genesis/src/track_editor_widget.cpp:27
#10 0x0000000000426f03 in EventDispatcher::trigger (this=0xbc40e0, event=EventProjectTracksChanged)
    at /home/andy/dev/genesis/src/event_dispatcher.hpp:62
#11 0x0000000000447f6e in trigger_event (project=0xbc3f40, event=EventProjectTracksChanged)
    at /home/andy/dev/genesis/src/project.cpp:722
#12 0x000000000044802e in project_compute_indexes (project=0xbc3f40) at /home/andy/dev/genesis/src/project.cpp:734
#13 0x0000000000449bfa in project_insert_track (project=0xbc3f40, before=0x20b7ba0, after=0x0)
    at /home/andy/dev/genesis/src/project.cpp:1322
#14 0x0000000000444f3e in insert_track_after_handler (userdata=0x16001d0)
    at /home/andy/dev/genesis/src/track_editor_widget.cpp:17
#15 0x000000000043ca87 in MenuWidgetItem::activate (this=0x16094f0)
    at /home/andy/dev/genesis/src/menu_widget.cpp:267
#16 0x000000000043d364 in ContextMenuWidget::on_key_event (this=0x20facb0, event=0x7fffffffde90)
    at /home/andy/dev/genesis/src/menu_widget.cpp:408
#17 0x0000000000435de2 in GuiWindow::key_callback (this=0xb7ffa0, key=65, scancode=38, action=1, mods=0)
    at /home/andy/dev/genesis/src/gui_window.cpp:267
#18 0x00000000004350e3 in static_key_callback (window=0xbca330, key=65, scancode=38, action=1, mods=0)
    at /home/andy/dev/genesis/src/gui_window.cpp:44
#19 0x00007ffff72ce8dc in ?? () from /usr/lib/x86_64-linux-gnu/libglfw.so.3
#20 0x00000000004263ba in Gui::exec (this=0x7b3040) at /home/andy/dev/genesis/src/gui.cpp:120
#21 0x0000000000431a94 in GenesisEditor::exec (this=0x7fffffffe1a0)
    at /home/andy/dev/genesis/src/genesis_editor.cpp:353
#22 0x0000000000420957 in main (argc=1, argv=0x7fffffffe2e8) at /home/andy/dev/genesis/src/main.cpp:8