Error when using Gtk and PyPlot

[nzqo]

Hey,
I guess this problem is related to #199 .
When I try to use PyPlot and Gtk, I get errors all the time. I'm on MacOS10.13.1. At first I got a segmentation error, now after changing the backend as described in the post, the following code:

using PyPlot
using PyCall
using Gtk

figure()

produces the error:

(process:1214): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
2017-12-06 07:02:06.400 julia[1214:261660] -[NSApplication _setup:]: unrecognized selector sent to instance 0x7fbef5f626b0
2017-12-06 07:02:06.403 julia[1214:261660] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSApplication _setup:]: unrecognized selector sent to instance 0x7fbef5f626b0'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff57dd92fb __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fff7e74bc76 objc_exception_throw + 48
2 CoreFoundation 0x00007fff57e71da4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x00007fff57d4f670 forwarding + 1456
4 CoreFoundation 0x00007fff57d4f038 _CF_forwarding_prep_0 + 120
5 libtk8.6.dylib 0x00000001251a546f TkpInit + 383
6 libtk8.6.dylib 0x00000001250fe21e Initialize + 2622
7 _tkinter.so 0x0000000124f25be4 Tcl_AppInit + 84
8 _tkinter.so 0x0000000124f25448 Tkinter_Create + 1128
9 libpython2.7.dylib 0x0000000122f6e8f4 PyEval_EvalFrameEx + 22980
10 libpython2.7.dylib 0x0000000122f68cd4 PyEval_EvalCodeEx + 2164
11 libpython2.7.dylib 0x0000000122eeabb3 function_call + 355
12 libpython2.7.dylib 0x0000000122ec24d5 PyObject_Call + 101
13 libpython2.7.dylib 0x0000000122ed1642 instancemethod_call + 162
14 libpython2.7.dylib 0x0000000122ec24d5 PyObject_Call + 101
15 libpython2.7.dylib 0x0000000122f72a2f PyEval_CallObjectWithKeywords + 159
16 libpython2.7.dylib 0x0000000122ecf5d4 PyInstance_New + 148
17 libpython2.7.dylib 0x0000000122ec24d5 PyObject_Call + 101
18 libpython2.7.dylib 0x0000000122f6e578 PyEval_EvalFrameEx + 22088
19 libpython2.7.dylib 0x0000000122f68cd4 PyEval_EvalCodeEx + 2164
20 libpython2.7.dylib 0x0000000122f7301d fast_function + 109
21 libpython2.7.dylib 0x0000000122f6e399 PyEval_EvalFrameEx + 21609
22 libpython2.7.dylib 0x0000000122f68cd4 PyEval_EvalCodeEx + 2164
23 libpython2.7.dylib 0x0000000122eeabb3 function_call + 355
24 libpython2.7.dylib 0x0000000122ec24d5 PyObject_Call + 101
25 libpython2.7.dylib 0x0000000122f6f600 PyEval_EvalFrameEx + 26320
26 libpython2.7.dylib 0x0000000122f68cd4 PyEval_EvalCodeEx + 2164
27 libpython2.7.dylib 0x0000000122eeabb3 function_call + 355
28 libpython2.7.dylib 0x0000000122ec24d5 PyObject_Call + 101
29 ??? 0x0000000122a84dd2 0x0 + 4876422610
30 ??? 0x0000000122a82bb2 0x0 + 4876413874
31 ??? 0x0000000122a827a9 0x0 + 4876412841
32 ??? 0x0000000122a8262f 0x0 + 4876412463
33 libjulia.0.6.1.dylib 0x000000010ab870e8 do_call + 200
34 libjulia.0.6.1.dylib 0x000000010ab85216 eval + 870
35 libjulia.0.6.1.dylib 0x000000010ab84ea1 jl_interpret_toplevel_expr + 49
36 libjulia.0.6.1.dylib 0x000000010ab9b355 jl_toplevel_eval_flex + 1845
37 libjulia.0.6.1.dylib 0x000000010ab9b10d jl_toplevel_eval_flex + 1261
38 libjulia.0.6.1.dylib 0x000000010ab7f7cb jl_toplevel_eval_in + 523
39 sys.dylib 0x000000010cde0c9a julia_eval_18069 + 10
40 sys.dylib 0x000000010cde0cb0 jlcall_eval_18068 + 16
41 sys.dylib 0x000000010ce32304 julia_process_options_18952 + 1316
42 sys.dylib 0x000000010ce34c01 julia__start_18945 + 1201
43 sys.dylib 0x000000010ce35699 jlcall__start_18944 + 9
44 julia 0x000000010ab5e414 true_main + 1364
45 julia 0x000000010ab5de83 main + 227
46 libdyld.dylib 0x00007fff7f33a145 start + 1
47 ??? 0x0000000000000003 0x0 + 3
)
libc++abi.dylib: terminating with uncaught exception of type NSException
signal (6): Abort trap: 6
while loading no file, in expression starting on line 0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 5617399 (Pool: 5615968; Big: 1431); GC: 11

of which I don't understand a word. I also couldn't fix the "Locale not supported by C" warning.
Does anyone have a solution for this?

[stevengj]

The locale thing is just a harmless warning. The real error is unrecognized selector sent to instance and indicates a problem in the backend … use a different backend.