DXC hangs when writing a bitfield in groupshared memory, indexed by a numeric literal

Description
I have a struct that includes bitfields. There is an array of these structs in groupshared memory. Indexing the array with an integer literal to write the bitfield causes DXC to hang.

Steps to Reproduce

dxc.exe /Zi -Qembed_debug /Tcs_6_6

struct MyStruct
{
    uint32_t token : 32;
};

groupshared MyStruct gs_array[1];

[numthreads(32, 1, 1)]
void main(uint GI : SV_GroupIndex)
{
    // literal index into local array to write a bitfield
    MyStruct array[1];
    array[0].token = 3; // <-- FINE

    // variable index into groupshared memory to write a bitfield
    uint i = 0;
    gs_array[i].token = 3; // <-- FINE

    // literal index into groupshared memory to write a bitfield
    gs_array[0].token = 3; // <-- HANG
}

Actual Behavior
DXC hangs

Environment

• DXC version (dxcompiler.dll: 1.8 - 1.8.2407.7 (416fab6b5); dxil.dll: 1.8(101.8.2407.12))
• Host Operating System "Windows 11 24H2"

Start with the supplied dxc.exe /Zi -Qembed_debug /Tcs_6_6 command and minimal shader, comparing the local-array, variable-index groupshared, and literal-index groupshared assignments. Done means the literal groupshared bitfield write compiles without hanging, with a regression test for this reproducer if the project’s test location is identified.