glutBitmapCharacter causes SIGSEGV on macOS

[brechtm]

Adding the following to glut_example.nim (following glEnd() # End of drawing) causes a segmentation fault:

  for character in "text":
    glutBitmapCharacter(GLUT_BITMAP_HELVETICA_10, character.ord)

Output:

...
CC: opengl_glu
Hint:  [Link]
Hint: operation successful (28380 lines compiled; 1.209 sec total; 60.383MiB peakmem; Debug Build) [SuccessX]
Hint: /private/tmp/glut_example  [Exec]
Traceback (most recent call last)
glut_example.nim(114)    glut_example
glut_example.nim(76)     display
SIGSEGV: Illegal storage access. (Attempt to read from nil?)
Error: execution of an external program failed: '/private/tmp/glut_example '

GDB output:

(gdb) r
Starting program: /private/tmp/glut_example
[New Thread 0xf03 of process 8414]
warning: unhandled dyld version (15)
[New Thread 0x1003 of process 8414]
[New Thread 0x1107 of process 8414]
[New Thread 0x1503 of process 8414]
[New Thread 0x2603 of process 8414]
[New Thread 0x2703 of process 8414]
[New Thread 0x2803 of process 8414]
[New Thread 0x2903 of process 8414]

Thread 2 received signal SIGSEGV, Segmentation fault.
0x00007fff48330def in ?? ()

Can I make gdb output more useful information?

[data-man]

Works for me on the both cards:

freeglut glutBitmapCharacter: bitmap font 0x00000000 not found. Make sure you're not passing a stroke font.
freeglut glutBitmapCharacter: bitmap font 0x00000000 not found. Make sure you're not passing a stroke font.
freeglut glutBitmapCharacter: bitmap font 0x00000000 not found. Make sure you're not passing a stroke font.
freeglut glutBitmapCharacter: bitmap font 0x00000000 not found. Make sure you're not passing a stroke font.

Nim-devel, ArchLinux x64, gcc 8.1.0, latest opengl module
The first card:

GL_VERSION: 3.0 Mesa 18.0.4
GL_SHADING_LANGUAGE_VERSION = 1.30
GLU_VERSION: 1.3
GLU_EXTENSIONS: GLU_EXT_nurbs_tessellator GLU_EXT_object_space_tess 
GLUT_API_VERSION: 4
GLUT_XLIB_IMPLEMENTATION: 13

The second card:

GL_VERSION: 4.6.0 NVIDIA 396.24
GL_SHADING_LANGUAGE_VERSION = 4.60 NVIDIA
GLU_VERSION: 1.3
GLU_EXTENSIONS: GLU_EXT_nurbs_tessellator GLU_EXT_object_space_tess 
GLUT_API_VERSION: 4
GLUT_XLIB_IMPLEMENTATION: 13

[brechtm]

The font pointers are also 0 for me. That may not be the cause of the segfault, but I'm sure this not a good thing either.

[brechtm]

I did learn that glutBitmapCharacter is deprecated since macOS 10.9 and I'm on 10.13.4. However, compiling and running this C code from the Survey Of OpenGL Font Technology does work.