Comment line for custom target has added leading 1>

Usage
,
1

For example:

    set(name example)
    add_executable(${name} ${...})

    set(customName customTarget)
    add_custom_target(${customName} COMMENT "#${customName}"
        COMMAND ${CMAKE_COMMAND} -E echo $<TARGET_FILE:${name}>
    )

1>#customTarget
<path to build folder>/Debug/example.exe

Is this 1> a bug, intended to redirect it to the standard error?

2

Can you share more about your build environment? This looks like the way MSBuild prefixes project build output with the ordinal number of the project being built.