zig

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      1 const assert = @import("std").debug.assert;
      2 
      3 fn foo(id: u64) !i32 {
      4     return switch (id) {
      5         1 => getErrInt(),
      6         2 => {
      7             const size = try getErrInt();
      8             return try getErrInt();
      9         },
     10         else => error.ItBroke,
     11     };
     12 }
     13 
     14 fn getErrInt() %i32 { return 0; }
     15 
     16 test "ir block deps" {
     17     assert((foo(1) catch unreachable) == 0);
     18     assert((foo(2) catch unreachable) == 0);
     19 }