[Bug 97095] Debug version driver crashes with WebGL 2.0 test "conformance/textures/image/tex-2d-rgb-rgb-unsigned_byte.html" on Intel Skylake machine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97095

            Bug ID: 97095
           Summary: Debug version driver crashes with WebGL 2.0 test
                    "conformance/textures/image/tex-2d-rgb-rgb-unsigned_by
                    te.html" on Intel Skylake machine
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: yang.gu at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

The crash happens only with debug version driver as it's an assertion error.
Tests can pass with release version driver.
The crash happens only with Skylake, and Broadwell doesn't have this issue.

Steps to repro:
1. Run latest "google-chrome-unstable" on Skylake Linux with option
"--enable-unsafe-es3-apis" to enable WebGL 2.0 support.
2. Run test case by typing following link in Chromium
"https://www.khronos.org/registry/webgl/sdk/tests/conformance/textures/image/tex-2d-rgb-rgb-unsigned_byte.html?webglVersion=2&quiet=0"
3. You may get following error in terminal:
brw_blorp_clear.cpp:245: bool do_single_blorp_clear(brw_context*,
gl_framebuffer*, gl_renderbuffer*, unsigned int, bool, bool, unsigned int):
Assertion `partial_clear' failed.

Actually there are many other cases (such as all the cases under
confromance/textures/image/) would crash due to this.

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