Created attachment 133555 [details]
Stack trace captured with GDB

The test added in bug 100438 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] https://bugs.freedesktop.org/show_bug.cgi?id=100438