$ zig build-obj repro.zig
thread 593935 panic: attempt to use null value
Analyzing repro.zig
      %2 = typeof_log2_int_type(@one) node_offset:2:24 to :2:25
      %3 = int(64)
      %4 = as_shift_operand(%2, %3) node_offset:2:29 to :2:31
      %5 = shl(@one, %4) node_offset:2:24 to :2:31
    > %6 = shl_sat(@zero, %5) node_offset:2:17 to :2:32
      %7 = extended(compile_log(%6)) node_offset:2:5 to :2:33
      %8 = ensure_result_used(%7) node_offset:2:5 to :2:33
      %9 = break_inline(%1, @void_value)
    For full context, use the command
      zig ast-check -t repro.zig


Unwind error at address `:0x14ad81f` (error.AddressOutOfRange), trace may be incomplete

src/Value.zig:251:36: 0x1ebe036 in toUnsignedInt (main.zig)
    return getUnsignedInt(val, zcu).?;
                                   ^
src/Value.zig:2554:52: 0x2689ae8 in shlScalar (main.zig)
    const shift: usize = @intCast(rhs.toUnsignedInt(zcu));
                                                   ^
src/Value.zig:2545:21: 0x268a7f5 in shl (main.zig)
    return shlScalar(lhs, rhs, ty, allocator, pt);
                    ^
src/Sema.zig:14236:28: 0x268fe1d in zirShl (main.zig)
            try lhs_val.shl(rhs_val, lhs_ty, sema.arena, pt)
                           ^
src/Sema.zig:1319:42: 0x221a205 in analyzeBodyInner (main.zig)
            .shl_sat   => try sema.zirShl(block, inst, .shl_sat),
                                         ^
src/Sema.zig:1024:30: 0x1e7f6c9 in analyzeInlineBody (main.zig)
    if (sema.analyzeBodyInner(block, body)) |_| {
                             ^
src/Sema.zig:1057:39: 0x1bf37af in resolveInlineBody (main.zig)
    return (try sema.analyzeInlineBody(block, body, break_target)) orelse .unreachable_value;
                                      ^
src/Zcu/PerThread.zig:860:50: 0x1e4a67c in analyzeComptimeUnit (main.zig)
    const result_ref = try sema.resolveInlineBody(&block, value_body, inst_resolved.inst);
                                                 ^
src/Zcu/PerThread.zig:764:34: 0x1bdba0c in ensureComptimeUnitUpToDate (main.zig)
    return pt.analyzeComptimeUnit(cu_id) catch |err| switch (err) {
                                 ^
src/Compilation.zig:4059:67: 0x19bbdb4 in processOneJob (main.zig)
                .@"comptime" => |cu| pt.ensureComptimeUnitUpToDate(cu),
                                                                  ^
src/Compilation.zig:3981:30: 0x18907d4 in performAllTheWorkInner (main.zig)
            try processOneJob(@intFromEnum(Zcu.PerThread.Id.main), comp, job);
                             ^
src/Compilation.zig:3721:36: 0x1718b3c in performAllTheWork (main.zig)
    try comp.performAllTheWorkInner(main_progress_node);
                                   ^
src/Compilation.zig:2333:31: 0x15ee4ea in update (main.zig)
    try comp.performAllTheWork(main_progress_node);
                              ^
src/main.zig:4514:20: 0x16379d8 in updateModule (main.zig)
    try comp.update(prog_node);
                   ^
src/main.zig:3704:21: 0x165c1b1 in buildOutputType (main.zig)
        updateModule(comp, color, root_prog_node) catch |err| switch (err) {
                    ^
src/main.zig:277:31: 0x168efa8 in mainArgs (main.zig)
        return buildOutputType(gpa, arena, args, .{ .build = .Obj });
                              ^
src/main.zig:212:20: 0x159d990 in main (main.zig)
    return mainArgs(gpa, arena, args);
                   ^
lib/std/start.zig:656:37: 0x159b3ee in main (std.zig)
            const result = root.main() catch |err| {
                                    ^