Description of problem:
Distortion and a couple of other effects instant-crash once they're applied. (Opening the dialog and changing settings usually works, but "Apply" instant crashes.) Other effects like Reverb or Amplify, or any other sort of editing I tried works.

Version-Release number of selected component (if applicable):
2.3.0-1.fc29

How reproducible:
Always, hasn't not crashed even once

Steps to Reproduce:
1. Open any audio file in audacity
2. Select some audio
3. Click Effect > Distortion
4. Click "Apply"

Actual results:
always crashes

Expected results:
does something without crashing

Additional info:
here is some basic gdb info:

(gdb) bt
#0  0x0000555555b0a156 in AudacityProject::DoEffect(wxString const&, CommandContext const&, int)
    (this=this@entry=0x5555568d2410, ID=..., flags=flags@entry=1) at Menus.cpp:4575
#1  0x0000555555c70cef in Effect::Apply() (this=0x555556991130) at effects/Effect.cpp:770
#2  0x0000555555c76909 in EffectUIHost::OnApply(wxCommandEvent&) (this=0x555556efea00, evt=...)
    at effects/Effect.cpp:3326
#3  0x00007ffff72c8492 in wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) (entry=..., handler=<optimized out>, event=...) at ../include/wx/app.h:439
#4  0x00007ffff72c85a3 in wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
    (this=<optimized out>, event=..., self=self@entry=0x555556efea00) at ../src/common/event.cpp:996
#5  0x00007ffff72c8900 in wxEvtHandler::TryHereOnly(wxEvent&) (this=0x555556efea00, event=...)
    at ../src/common/event.cpp:1587
#6  0x00007ffff72c898b in wxEvtHandler::TryBeforeAndHere(wxEvent&) (event=..., this=0x555556efea00)
    at ../include/wx/event.h:3671
#7  0x00007ffff72c898b in wxEvtHandler::ProcessEventLocally(wxEvent&)
    (this=0x555556efea00, event=...) at ../src/common/event.cpp:1520
#8  0x00007ffff72c8a21 in wxEvtHandler::ProcessEvent(wxEvent&) (this=0x555556efea00, event=...)
    at ../src/common/event.cpp:1493
#9  0x00007ffff784d1cb in wxWindowBase::TryAfter(wxEvent&) (this=0x555556be4b30, event=...)
    at ../include/wx/window.h:846
#10 0x00007ffff784d1cb in wxWindowBase::TryAfter(wxEvent&) (this=0x5555570b3c00, event=...)
    at ../include/wx/window.h:846
#11 0x00007ffff72c87bb in wxEvtHandler::SafelyProcessEvent(wxEvent&)
    (this=<optimized out>, event=...) at ../src/common/event.cpp:1611
#12 0x00007ffff784e590 in wxWindowBase::HandleWindowEvent(wxEvent&) const
    (this=this@entry=0x5555570b3c00, event=...) at ../include/wx/window.h:846
#13 0x00007ffff76d8d57 in wxgtk_button_clicked_callback(GtkWidget*, wxButton*) (button=
    0x5555570b3c00) at ../src/gtk/button.cpp:40
#14 0x00007ffff64e23dd in g_closure_invoke () at /lib64/libgobject-2.0.so.0
#15 0x00007ffff64f547e in  () at /lib64/libgobject-2.0.so.0
#16 0x00007ffff64feaaa in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0
#17 0x00007ffff64ff0a3 in g_signal_emit () at /lib64/libgobject-2.0.so.0
#18 0x00007ffff6a22355 in  () at /lib64/libgtk-x11-2.0.so.0
#19 0x00007ffff64e23dd in g_closure_invoke () at /lib64/libgobject-2.0.so.0
#20 0x00007ffff64f5b26 in  () at /lib64/libgobject-2.0.so.0
#21 0x00007ffff64feaaa in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0
#22 0x00007ffff64ff0a3 in g_signal_emit () at /lib64/libgobject-2.0.so.0
#23 0x00007ffff6a20f5c in  () at /lib64/libgtk-x11-2.0.so.0
#24 0x00007ffff6adcf9d in  () at /lib64/libgtk-x11-2.0.so.0
#25 0x00007ffff64e23dd in g_closure_invoke () at /lib64/libgobject-2.0.so.0
#26 0x00007ffff64f51b4 in  () at /lib64/libgobject-2.0.so.0
#27 0x00007ffff64fe123 in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0
#28 0x00007ffff64ff0a3 in g_signal_emit () at /lib64/libgobject-2.0.so.0
#29 0x00007ffff6c1190c in  () at /lib64/libgtk-x11-2.0.so.0
#30 0x00007ffff6adabbc in gtk_propagate_event () at /lib64/libgtk-x11-2.0.so.0
#31 0x00007ffff6adafbb in gtk_main_do_event () at /lib64/libgtk-x11-2.0.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#32 0x00007ffff6927720 in  () at /lib64/libgdk-x11-2.0.so.0
#33 0x00007ffff640006d in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#34 0x00007ffff6400438 in  () at /lib64/libglib-2.0.so.0
#35 0x00007ffff6400762 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#36 0x00007ffff6ad9f4f in gtk_main () at /lib64/libgtk-x11-2.0.so.0
#37 0x00007ffff7679c15 in wxGUIEventLoop::DoRun() (this=0x5555565105d0) at ../src/gtk/evtloop.cpp:65
#38 0x00007ffff7199e21 in wxEventLoopBase::Run() (this=0x5555565105d0)
    at ../src/common/evtloopcmn.cpp:78
#39 0x00007ffff715db1a in wxAppConsoleBase::MainLoop() (this=0x555556483c00)
    at ../src/common/appbase.cpp:334
#40 0x00007ffff71e3d0b in wxEntry(int&, wchar_t**) (argc=<optimized out>, argv=<optimized out>)
    at ../include/wx/app.h:439
#41 0x00005555559da166 in main(int, char**) (argc=<optimized out>, argv=<optimized out>)
    at AudacityApp.cpp:688
(gdb) info locals
plug = <optimized out>
type = EffectTypeProcess
nTracksOriginally = 1
iter = {<std::iterator<std::forward_iterator_tag, Track* const, long, Track* const*, Track* const&>> = {<No data fields>}, _vptr.TrackListIterator = 0x5555562f7e10 <vtable for TrackListIterator+16>, 
  l = 0x7fffc40043a0, cur = {first = 
  std::shared_ptr<Track> (use count 1, weak count 4) = {get() = 0x555556ab8a00}, 
    second = 0x7fffc40043f8}}
t = 0x555556ab8a00
focus = 0x0
parent = <optimized out>
success = <optimized out>
cleanup = <optimized out>
count = <optimized out>
clean = <optimized out>
em = <optimized out>
(gdb)