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<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segfault in `ir_dereference_variable::ir_dereference_variable` dereferencing NULL variable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102265">102265</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Segfault in `ir_dereference_variable::ir_dereference_variable` dereferencing NULL variable
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>17.2
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>pmenzel+bugs.freedesktop@molgen.mpg.de
</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=133555" name="attach_133555" title="Stack trace captured with GDB">attachment 133555</a> <a href="attachment.cgi?id=133555&action=edit" title="Stack trace captured with GDB">[details]</a></span>
Stack trace captured with GDB
The test added in <a class="bz_bug_link
bz_status_NEW "
title="NEW - glsl/ir.cpp:1376: ir_dereference_variable::ir_dereference_variable(ir_variable*): Assertion `var != NULL' failed."
href="show_bug.cgi?id=100438">bug 100438</a> crashes in radeonsi_dri.so (Linux 4.9.43, Mesa
17.1.6, libdrm 2.4.82).
```
glslparsertest[28096]: segfault at 20 ip 00007f52efb31088 sp 00007ffcac4e67e0
error 4 in radeonsi_dri.so[7f52ef82e000+964000]
```
Here is the backtrace.
```
ir_dereference_variable::ir_dereference_variable (var=0x0, this=0x776400) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ir.cpp:1391
1391
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ir.cpp: No
such file or directory.
#0 ir_dereference_variable::ir_dereference_variable (var=0x0, this=0x776400)
at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ir.cpp:1391
#1 ir_dereference_array::ir_dereference_array (this=0x776390, var=0x0,
array_index=0x775120) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ir.cpp:1411
#2 0x00007ffff1f17f9b in generate_array_index (mem_ctx=mem_ctx@entry=0x7627c0,
instructions=instructions@entry=0x775090, state=state@entry=0x7627c0, loc=...,
array=<optimized out>, idx=<optimized out>,
function_name=function_name@entry=0x7fffffffe480,
actual_parameters=0x7fffffffe4b0) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_function.cpp:668
#3 0x00007ffff1f1af98 in ast_function_expression::hir (this=0x763b00,
instructions=0x775090, state=0x7627c0) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_function.cpp:2191
#4 0x00007ffff1f225d3 in ast_expression_statement::hir (this=<optimized out>,
instructions=<optimized out>, state=<optimized out>) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_to_hir.cpp:2201
#5 0x00007ffff1f2262f in ast_compound_statement::hir (this=0x763c70,
instructions=0x775090, state=0x7627c0) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_to_hir.cpp:2217
#6 0x00007ffff1f2872a in ast_function_definition::hir (this=0x763cd0,
instructions=<optimized out>, state=0x7627c0) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_to_hir.cpp:5853
#7 0x00007ffff1f1f5f8 in _mesa_ast_to_hir (instructions=0x765020,
state=state@entry=0x7627c0) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/ast_to_hir.cpp:155
#8 0x00007ffff1f80b6a in _mesa_glsl_compile_shader (ctx=ctx@entry=0x71c1f0,
shader=shader@entry=0x762650, dump_ast=dump_ast@entry=false,
dump_hir=dump_hir@entry=false, force_recompile=force_recompile@entry=false) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/compiler/glsl/glsl_parser_extras.cpp:2071
#9 0x00007ffff1e1f4b4 in _mesa_compile_shader (ctx=0x71c1f0, sh=0x762650) at
/dev/shm/bee-root/mesalib/mesalib-17.1.6-0/source/src/mesa/main/shaderapi.c:1044
#10 0x00007ffff7a9b1f6 in stub_glCompileShader (shader=1) at
/dev/shm/piglit/tests/util/piglit-dispatch-gen.c:7084
#11 0x0000000000401f7f in test () at
/dev/shm/piglit/tests/glslparsertest/glslparsertest.c:303
#12 0x000000000040271d in piglit_init (argc=4, argv=0x7fffffffe998) at
/dev/shm/piglit/tests/glslparsertest/glslparsertest.c:543
#13 0x00007ffff7b3737b in run_test (gl_fw=0x615c20, argc=4,
argv=0x7fffffffe998) at
/dev/shm/piglit/tests/util/piglit-framework-gl/piglit_winsys_framework.c:73
#14 0x00007ffff7b1bb5d in piglit_gl_test_run (argc=4, argv=0x7fffffffe998,
config=0x7fffffffe850) at /dev/shm/piglit/tests/util/piglit-framework-gl.c:223
#15 0x000000000040199e in main (argc=4, argv=0x7fffffffe998) at
/dev/shm/piglit/tests/glslparsertest/glslparsertest.c:90
```
The full stack trace is attached.
[1] <a class="bz_bug_link
bz_status_NEW "
title="NEW - glsl/ir.cpp:1376: ir_dereference_variable::ir_dereference_variable(ir_variable*): Assertion `var != NULL' failed."
href="show_bug.cgi?id=100438">https://bugs.freedesktop.org/show_bug.cgi?id=100438</a></pre>
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