[Bug 82585] New: geometry shader with optional out variable segfaults

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Aug 13 14:49:02 PDT 2014


          Priority: medium
            Bug ID: 82585
          Assignee: dri-devel at lists.freedesktop.org
           Summary: geometry shader with optional out variable segfaults
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: pavol at klacansky.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

Running this shader in geometry stage, it segfaults:

#version 330

layout(points) in;
layout(points, max_vertices = 1) out;

in gl_PerVertex {
    vec4 gl_Position;
    float gl_PointSize;
    float gl_ClipDistance[];
} gl_in[];

in vec4 v_colour[];
out vec4 g_colour;

void main() {
  for(int i = 0; i < 1; i++) {
    gl_Position = gl_in[i].gl_Position;
    gl_PrimitiveID = gl_PrimitiveIDIn;
    /* TODO report bug */
    g_colour = v_colour[i];

Following message is from Valgrind:
EE ../../../../../../src/gallium/drivers/r600/r600_shader.c:353
tgsi_is_supported - unsupported src 0 (dimension 1)
EE ../../../../../../src/gallium/drivers/r600/r600_shader.c:157
r600_pipe_shader_create - translation from TGSI failed !
EE ../../../../../../src/gallium/drivers/r600/r600_state_common.c:750
r600_shader_select - Failed to build shader variant (type=2) -22

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