[Bug 97447] GL 3.0 compatibility context exposes GL_ARB_compute_shader

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97447

            Bug ID: 97447
           Summary: GL 3.0 compatibility context exposes
                    GL_ARB_compute_shader
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: evan at techsoft3d.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

I'm finding that my Iris 6100 (Macbook Pro Retina 2015) is reporting support
for GL_ARB_compute_shader from the 3.0 compatibility context, which I assume is
a bug. Any compute shader I try to compile fails, and I can't see how compute
shaders could happily coexist in a 3.0 + glsl 130 environment anyway.

I'm running Ubuntu 16.04. This is the driver information from glxinfo:

Extended renderer info (GLX_MESA_query_renderer):
   Vendor: Intel Open Source Technology Center (0x8086)
   Device: Mesa DRI Intel(R) Iris 6100 (Broadwell GT3)  (0x162b)
   Version: 12.1.0
   Accelerated: yes
   Video memory: 3072MB
   Unified memory: yes
   Preferred profile: core (0x1)
   Max core profile version: 4.4
   Max compat profile version: 3.0
   Max GLES1 profile version: 1.1
   Max GLES[23] profile version: 3.1

You can see below that ARB_compute_shader is included in the extensions string
for the compatibility profile:

OpenGL version string: 3.0 Mesa 12.1.0-devel
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
   GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth, 
   GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture, 
   GL_AMD_shader_trinary_minmax, GL_ANGLE_texture_compression_dxt3, 
   GL_ANGLE_texture_compression_dxt5, GL_APPLE_object_purgeable, 
   GL_APPLE_packed_pixels, GL_APPLE_vertex_array_object, 
   GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility, 
   GL_ARB_arrays_of_arrays, GL_ARB_blend_func_extended, 
   GL_ARB_buffer_storage, GL_ARB_clear_buffer_object, GL_ARB_clear_texture, 
   GL_ARB_clip_control, GL_ARB_color_buffer_float, 
   GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader, 
   GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
   GL_ARB_copy_buffer, GL_ARB_copy_image, GL_ARB_cull_distance,

Hopefully this is the right place to report this, and this is sufficient
information to go on. Please let me know if there's something else I can
provide to help out.

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