Reftest crash when using NVidia driver with webrender

[shinglyu]

I'm using Dell XPS 15 with a standalone NVidia graphics card. I'm running Ubuntu 16.04 64bit with NVidia driver version 367.27.

When I run ./mach test-css, I got the following crash from all the tests:

  ▶ CRASH [expected PASS] /css-flexbox-1_dev/html/flex-minimum-width-flex-items-008.htm
  │ 
  │ 
  │ 
  │ 
  │ Failed to compile shader: "/home/shinglyu/workspace/servo/resources/shaders/box_shadow.vs.glsl"
  │ 
  │ -- Shader compile failed - exiting -- (thread main, at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/device.rs:904)
  │ stack backtrace:
  │    0:     0x56129b3a4461 - backtrace::backtrace::libunwind::trace
  │                         at /home/shinglyu/workspace/servo/./.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/backtrace/mod.rs:82
  │                          - backtrace::backtrace::trace<closure>
  │                         at /home/shinglyu/workspace/servo/./.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/backtrace/mod.rs:70
  │    1:     0x56129b3a5118 - backtrace::capture::{{impl}}::new
  │                         at /home/shinglyu/workspace/servo/./.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/lib.rs:96
  │    2:     0x56129759cc3c - servo::main::{{closure}}
  │                         at /home/shinglyu/workspace/servo/components/servo/main.rs:121
  │    3:     0x56129c5b1c65 - std::panicking::rust_panic_with_hook::hcd9d05f53fa0dafc
  │    4:     0x56129b5cbc83 - std::panicking::begin_panic<&str>
  │                         at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:413
  │    5:     0x56129b731c91 - webrender::device::{{impl}}::compile_shader
  │                         at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/device.rs:904
  │    6:     0x56129b73496c - webrender::device::{{impl}}::load_program
  │                         at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/device.rs:1302
  │    7:     0x56129b7342f9 - webrender::device::{{impl}}::create_program_with_prefix
  │                         at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/device.rs:1271
  │    8:     0x56129b7338f8 - webrender::device::{{impl}}::create_program
  │                         at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/device.rs:1223
  │    9:     0x56129b772ae0 - webrender::renderer::{{impl}}::new
  │                         at /home/shinglyu/workspace/servo/./.cargo/git/checkouts/webrender-c3596abe1cf4f320/master/webrender/src/renderer.rs:432
  │   10:     0x56129748752d - servo::{{impl}}::new<glutin_app::window::Window>
  │                         at /home/shinglyu/workspace/servo/components/servo/lib.rs:157
  │   11:     0x561297591e81 - servo::main
  │                         at /home/shinglyu/workspace/servo/components/servo/main.rs:143
  │   12:     0x56129c5ba2b6 - __rust_maybe_catch_panic
  │   13:     0x56129c5b0d81 - std::rt::lang_start::h14cbded5fe3cd915
  │   14:     0x56129759cf93 - main
  │   15:     0x7f8ee3add82f - __libc_start_main
  │   16:     0x561297449ab8 - _start
  └   17:                0x0 - <unknown>

But when I run ./mach run, it works fine.

If I switch to the built-in Intel graphics driver with sudo prime-select intel,

the ./mach test-css runs correctly. But ./mach run gives me:

libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
Failed to create window.: OsError("GL context creation failed") (thread main, at ../src/libcore/result.rs:799)
stack backtrace:
   0:     0x55f456ed294d - backtrace::backtrace::trace::h6ac07ced1b846a59
   1:     0x55f456ed2fd2 - backtrace::capture::Backtrace::new::h1d3339ed08c7f861
   2:     0x55f45597018d - servo::main::_{{closure}}::hbb7607561bad1bf7
   3:     0x55f4574aaa15 - std::panicking::rust_panic_with_hook::hcd9d05f53fa0dafc
   4:     0x55f4574aa8e2 - std::panicking::begin_panic::hf6c488cee66e7f17
   5:     0x55f4574aa820 - std::panicking::begin_panic_fmt::hb0a7126ee57cdd27
   6:     0x55f4574aa7a1 - rust_begin_unwind
   7:     0x55f4574e6fbf - core::panicking::panic_fmt::h9af671b78898cdba
   8:     0x55f455973605 - core::result::unwrap_failed::hb7d5a35c50482e4c
   9:     0x55f45598bba1 - glutin_app::window::Window::new::h2d570c114da5696a
  10:     0x55f455991046 - glutin_app::create_window::hc6d966ef77a7895e
  11:     0x55f45596bf9a - servo::main::hf278725809d12b24
  12:     0x55f4574b3066 - __rust_maybe_catch_panic
  13:     0x55f4574a9b31 - std::rt::lang_start::h14cbded5fe3cd915
  14:     0x7f282756c82f - __libc_start_main
  15:     0x55f455929098 - _start
  16:                0x0 - <unknown>
Servo exited with return value 101

[shinglyu]

ping @glennw ?

[glennw]

@shinglyu Usually when a shader compile fails, the output log includes the error message from the shader compiler. Is there anything in the output logs from the nvidia shader compiler (I have seen drivers that sometimes fail to report a specific error, so there may not be anything). If not, you might need to comment out various parts of the shader mentioned in the log file to narrow down what the compiler is failing on.

[shinglyu]

@glennw I haven't seen logs from the nvidia shader compiler, probably it was consumed by the wpt test runner? I assume the wpt test use llvmpipe for headless rendering? Is there any way I can run servo with that configuration? Then I might be able to get the log.

[jdm]

@shinglyu #13515 (comment)

[shinglyu]

Just updated by intel graphics driver and it worked. Also updated the nvidia driver but it's still broken. Keeping this issue open because the nvidia issue is still not fixed.

[nox]

@shinglyu Can you still reproduce this?

[tigercosmos]

Maybe related to #18605 ?

[dralley]

Is this still reproducable for anyone? If not, might be best to close.