test/tint/extensions/parsing/duplicated_extensions.wgsl

// Enable a void internal extension for multiple times
// flags:  --hlsl-shader-model 62
enable f16;

enable f16;

enable f16;

@fragment
fn main() -> @location(0) vec4<f32> {
    return vec4<f32>(0.1, 0.2, 0.3, 0.4);
}