A discrepancy has been reported in their behavior: if the same failing test is executed, `BuildLauncher` will report a build failure but `TestLauncher` won't.
Originally, this was a design decision in order to continue the execution and run the tests in all test tasks and not stop at the first failure.
At the same time, this behavior can be confusing for users as they can experience a failing test in a successful build.

// ensure that every branch and condition is considered and accounted for -
// the same way code is written at NASA for applications like the space
// shuttle.
//
// Originally, the work of this controller was split amongst three
// controllers. This controller is the result a large effort to simplify the
// PV subsystem. During that effort, it became clear that we needed to ensure

// the merge happens in a stack location (a "stack" phi).
//
// A register phi must have the phi and all of its inputs allocated to the
// same register. Register phis are spilled similarly to regular ops.
//
// A stack phi must have the phi and all of its inputs allocated to the same
// stack location. Stack phis start out life already spilled - each phi
// input must be a store (using StoreReg) at the end of the corresponding

	{obj.ANOP, C_REG, C_NONE, C_NONE, 0, 0, 0, 0, 0, 0},
	{obj.ANOP, C_FREG, C_NONE, C_NONE, 0, 0, 0, 0, 0, 0},
	{obj.ADUFFZERO, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0, 0}, // same as ABL
	{obj.ADUFFCOPY, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0, 0}, // same as ABL
	{obj.AXXX, C_NONE, C_NONE, C_NONE, 0, 4, 0, 0, 0, 0},
}

var mbOp = []struct {
	reg int16
	enc uint32
}{
	{REG_MB_SY, 15},
	{REG_MB_ST, 14},

	sizes := make([]int64, 0, 2*len(dt.Field)+1)
	off := int64(0)

	// Rename struct fields that happen to be named Go keywords into
	// _{keyword}.  Create a map from C ident -> Go ident. The Go ident will
	// be mangled. Any existing identifier that already has the same name on
	// the C-side will cause the Go-mangled version to be prefixed with _.