// If it doesn't work, it doesn't work: reusing the cached binary is more
					// important than reprinting diagnostic information.
					if printOutput {
						showStdout(b, c, a, "stdout")      // compile output
						showStdout(b, c, a, "link-stdout") // link output
					}

					// Poison a.Target to catch uses later in the build.
					a.Target = "DO NOT USE - main build pseudo-cache Target"