SKIP: FAILED

; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 40
; Schema: 0
               OpCapability Shader
               OpCapability SampledCubeArray
               OpMemoryModel Logical GLSL450
               OpEntryPoint Vertex %vertex_main "vertex_main" %tint_pointsize
               OpEntryPoint Fragment %fragment_main "fragment_main"
               OpEntryPoint GLCompute %compute_main "compute_main"
               OpExecutionMode %fragment_main OriginUpperLeft
               OpExecutionMode %compute_main LocalSize 1 1 1
               OpName %tint_pointsize "tint_pointsize"
               OpName %arg_0 "arg_0"
               OpName %arg_1 "arg_1"
               OpName %textureSampleGrad_e383db "textureSampleGrad_e383db"
               OpName %res "res"
               OpName %vertex_main "vertex_main"
               OpName %fragment_main "fragment_main"
               OpName %compute_main "compute_main"
               OpDecorate %tint_pointsize BuiltIn PointSize
               OpDecorate %arg_0 DescriptorSet 1
               OpDecorate %arg_0 Binding 0
               OpDecorate %arg_1 DescriptorSet 1
               OpDecorate %arg_1 Binding 1
      %float = OpTypeFloat 32
%_ptr_Output_float = OpTypePointer Output %float
          %4 = OpConstantNull %float
%tint_pointsize = OpVariable %_ptr_Output_float Output %4
          %7 = OpTypeImage %float Cube 0 1 0 1 Unknown
%_ptr_UniformConstant_7 = OpTypePointer UniformConstant %7
      %arg_0 = OpVariable %_ptr_UniformConstant_7 UniformConstant
         %10 = OpTypeSampler
%_ptr_UniformConstant_10 = OpTypePointer UniformConstant %10
      %arg_1 = OpVariable %_ptr_UniformConstant_10 UniformConstant
       %void = OpTypeVoid
         %11 = OpTypeFunction %void
    %v4float = OpTypeVector %float 4
         %19 = OpTypeSampledImage %7
        %int = OpTypeInt 32 1
      %int_1 = OpConstant %int 1
    %v3float = OpTypeVector %float 3
         %26 = OpConstantNull %v3float
%_ptr_Function_v4float = OpTypePointer Function %v4float
         %29 = OpConstantNull %v4float
    %float_1 = OpConstant %float 1
%textureSampleGrad_e383db = OpFunction %void None %11
         %14 = OpLabel
        %res = OpVariable %_ptr_Function_v4float Function %29
         %17 = OpLoad %10 %arg_1
         %18 = OpLoad %7 %arg_0
         %20 = OpSampledImage %19 %18 %17
         %21 = OpConvertSToF %float %int_1
         %24 = OpCompositeConstruct %v4float %21
         %15 = OpImageSampleExplicitLod %v4float %20 %24 Grad %26 %26
               OpStore %res %15
               OpReturn
               OpFunctionEnd
%vertex_main = OpFunction %void None %11
         %31 = OpLabel
               OpStore %tint_pointsize %float_1
         %33 = OpFunctionCall %void %textureSampleGrad_e383db
               OpReturn
               OpFunctionEnd
%fragment_main = OpFunction %void None %11
         %35 = OpLabel
         %36 = OpFunctionCall %void %textureSampleGrad_e383db
               OpReturn
               OpFunctionEnd
%compute_main = OpFunction %void None %11
         %38 = OpLabel
         %39 = OpFunctionCall %void %textureSampleGrad_e383db
               OpReturn
               OpFunctionEnd


Validation Failure:
1:1: Expected number of constituents to be at least 2
  %24 = OpCompositeConstruct %v4float %21