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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segfault in compiler while processing ternary operator with void arguments"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85252">85252</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Segfault in compiler while processing ternary operator with void arguments
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>glsl-compiler
</td>
</tr>
<tr>
<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=108126" name="attach_108126" title="Test case">attachment 108126</a> <a href="attachment.cgi?id=108126&action=edit" title="Test case">[details]</a></span>
Test case
The attached test (also sent to the piglit list) segfaults in ast_to_hir. gdb
output below.
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff3c429b3 in ast_expression::do_hir (this=0xae4738,
instructions=0xa4dc80, state=0xab6ef8, needs_rvalue=<optimized out>)
at ../../src/glsl/ast_to_hir.cpp:1574
1574 if ((!apply_implicit_conversion(op[1]->type, op[2], state)
Missing separate debuginfos, use: debuginfo-install expat-2.1.0-4.fc18.x86_64
glibc-2.16-34.fc18.x86_64 libgcc-4.7.2-8.fc18.x86_64
libstdc++-4.7.2-8.fc18.x86_64 mesa-libGLU-9.0.0-1.fc18.x86_64
systemd-libs-201-2.fc18.9.x86_64
(gdb) bt
#0 0x00007ffff3c429b3 in ast_expression::do_hir (this=0xae4738,
instructions=0xa4dc80, state=0xab6ef8, needs_rvalue=<optimized out>)
at ../../src/glsl/ast_to_hir.cpp:1574
#1 0x00007ffff3c44663 in ast_expression_statement::hir (this=<optimized out>,
instructions=<optimized out>, state=<optimized out>)
at ../../src/glsl/ast_to_hir.cpp:1829
#2 0x00007ffff3c446af in ast_compound_statement::hir (this=0xae4858,
instructions=0xa4dc80, state=0xab6ef8)
at ../../src/glsl/ast_to_hir.cpp:1845
#3 0x00007ffff3c46a61 in ast_function_definition::hir (this=0xae48d8,
instructions=<optimized out>, state=0xab6ef8)
at ../../src/glsl/ast_to_hir.cpp:4239
#4 0x00007ffff3c414c0 in _mesa_ast_to_hir (instructions=0xa9cd78,
state=0xab6ef8) at ../../src/glsl/ast_to_hir.cpp:100
#5 0x00007ffff3c97ffb in _mesa_glsl_compile_shader (
ctx=ctx@entry=0x7ffff3963038, shader=shader@entry=0xa9d5e8,
dump_ast=dump_ast@entry=false, dump_hir=dump_hir@entry=false)
at ../../src/glsl/glsl_parser_extras.cpp:1465
#6 0x00007ffff3af7fcc in compile_shader (ctx=0x7ffff3963038,
shaderObj=<optimized out>) at ../../src/mesa/main/shaderapi.c:852
#7 0x00007ffff7cfc75f in stub_glCompileShader (shader=1)
at tests/util/piglit-dispatch-gen.c:6375
#8 0x0000000000405598 in compile_glsl (target=35633)
at tests/shaders/shader_runner.c:326
#9 0x00000000004061b7 in leave_state (state=vertex_shader,
line=0xaa4840 "[fragment shader]\n\nvarying vec4 c;\nuniform bool
b;\n\nvoid good(void)\n{\n gl_FragColor = c;\n}\n\nvoid bad(void)\n{\n
gl_FragColor = c + vec4(0, 0, 1, 0);\n}\n\nvoid main()\n{\n b ? good() :
bad();\n}\n\n[te"...) at tests/shaders/shader_runner.c:706
#10 0x00000000004067f9 in process_test_script (
script_name=0x7fffffffe25c
"tests/spec/glsl-1.10/execution/void-ternary.shader_test") at
tests/shaders/shader_runner.c:900
#11 0x000000000040b2a9 in piglit_init (argc=2, argv=0x7fffffffded8)
at tests/shaders/shader_runner.c:2685
#12 0x00007ffff7d87224 in run_test (gl_fw=0x612010, argc=2,
argv=0x7fffffffded8)
at tests/util/piglit-framework-gl/piglit_winsys_framework.c:72
#13 0x00007ffff7d6c86b in piglit_gl_test_run (argc=2, argv=0x7fffffffded8,
config=0x7fffffffdda0) at tests/util/piglit-framework-gl.c:151
#14 0x0000000000404ef2 in main (argc=2, argv=0x7fffffffded8)
at tests/shaders/shader_runner.c:60</pre>
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