<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - SIGSEGV in state_tracker/st_glsl_to_tgsi_temprename.cpp" href="https://bugs.freedesktop.org/show_bug.cgi?id=104803#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - SIGSEGV in state_tracker/st_glsl_to_tgsi_temprename.cpp" href="https://bugs.freedesktop.org/show_bug.cgi?id=104803">bug 104803</a> from <a class="email" href="mailto:brad.king@kitware.com" title="Brad King <brad.king@kitware.com>"> Brad King</a> <pre>Created <a href="attachment.cgi?id=136976" name="attach_136976" title="apitrace of test recorded before change that crashes">attachment 136976</a> <a href="attachment.cgi?id=136976&action=edit" title="apitrace of test recorded before change that crashes">[details]</a> apitrace of test recorded before change that crashes Thanks Brian. For another try, here is an apitrace of the test that is more complete by running it with a version of Mesa from just before the breakage. Also, here is valgrind memcheck output from the segfault: ``` ==27717== Invalid read of size 4 ==27717== at 0x8B2D542: (anonymous namespace)::prog_scope::begin() const (st_glsl_to_tgsi_temprename.cpp:437) ==27717== by 0x8B2D32E: (anonymous namespace)::prog_scope::contains_range_of((anonymous namespace)::prog_scope const&) const (st_glsl_to_tgsi_temprename.cpp:365) ==27717== by 0x8B2E047: (anonymous namespace)::temp_comp_access::get_required_lifetime() (st_glsl_to_tgsi_temprename.cpp:803) ==27717== by 0x8B2D8DB: (anonymous namespace)::temp_access::get_required_lifetime() (st_glsl_to_tgsi_temprename.cpp:527) ==27717== by 0x8B2E5B6: (anonymous namespace)::access_recorder::get_required_lifetimes(lifetime*) (st_glsl_to_tgsi_temprename.cpp:933) ==27717== by 0x8B2EF39: get_temp_registers_required_lifetimes(void*, exec_list*, int, lifetime*) (st_glsl_to_tgsi_temprename.cpp:1120) ==27717== by 0x8B243A3: glsl_to_tgsi_visitor::merge_registers() (st_glsl_to_tgsi.cpp:5316) ==27717== by 0x8B28B28: get_mesa_program_tgsi(gl_context*, gl_shader_program*, gl_linked_shader*) (st_glsl_to_tgsi.cpp:6767) ==27717== by 0x8B294C4: st_link_shader (st_glsl_to_tgsi.cpp:7065) ==27717== by 0x8B4EB76: _mesa_glsl_link_shader (ir_to_mesa.cpp:3126) ==27717== by 0x89FD6C2: link_program (shaderapi.c:1203) ==27717== by 0x89FD6C2: link_program_error (shaderapi.c:1281) ==27717== by 0x89FECAC: _mesa_LinkProgram (shaderapi.c:1773) ==27717== Address 0xc is not stack'd, malloc'd or (recently) free'd ``` That "Address 0xc" looks suspicious.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>