[Bug 96729] Wrong shader compilation error message

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96729

            Bug ID: 96729
           Summary: Wrong shader compilation error message
           Product: Mesa
           Version: 10.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: glsl-compiler
          Assignee: idr at freedesktop.org
          Reporter: b7.10110111 at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Consider the following vertex shader:

#version 120

vec4 toColor(float x)
{
    ivec4 v=ivec4(0,0,0,0);
    v.y+=128*x;
    return v*1.;
}

void main()
{
    gl_Position=gl_ModelViewProjectionMatrix*gl_Vertex;
    vec4 c=toColor(0.);
    gl_FrontColor=vec4(c.rgb,1);
}


It contains an error of implicit conversion of float to integer. But what I get
in Mesa's info log instead is:

0:6(2): error: non-lvalue in assignment

And this is despite v.y is an lvalue.

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