link.multiUnitLayout.2.frag
Shader version: 450
using depth_less
0:? Sequence
0:8  Function Definition: outputColor(vf4; ( global void)
0:8    Function Parameters: 
0:8      'color' ( in 4-component vector of float)
0:10    Sequence
0:10      move second child to first child ( temp 4-component vector of float)
0:10        'FragColor' (layout( location=0) out 4-component vector of float)
0:10        'color' ( in 4-component vector of float)
0:?   Linker Objects
0:?     'gl_FragDepth' ( gl_FragDepth float FragDepth)
0:?     'FragColor' (layout( location=0) out 4-component vector of float)

link.multiUnitLayout.0.frag
Shader version: 450
using depth_greater
0:? Sequence
0:7  Function Definition: main( ( global void)
0:7    Function Parameters: 
0:9    Sequence
0:9      Function Call: outputColor(vf4; ( global void)
0:9        Constant:
0:9          1.000000
0:9          0.000000
0:9          0.000000
0:9          1.000000
0:10      move second child to first child ( temp float)
0:10        'gl_FragDepth' ( gl_FragDepth float FragDepth)
0:10        Constant:
0:10          0.500000
0:?   Linker Objects
0:?     'gl_FragDepth' ( gl_FragDepth float FragDepth)


Linked fragment stage:

ERROR: Linking fragment stage: Contradictory depth layouts

Shader version: 450
using depth_less
0:? Sequence
0:8  Function Definition: outputColor(vf4; ( global void)
0:8    Function Parameters: 
0:8      'color' ( in 4-component vector of float)
0:10    Sequence
0:10      move second child to first child ( temp 4-component vector of float)
0:10        'FragColor' (layout( location=0) out 4-component vector of float)
0:10        'color' ( in 4-component vector of float)
0:7  Function Definition: main( ( global void)
0:7    Function Parameters: 
0:9    Sequence
0:9      Function Call: outputColor(vf4; ( global void)
0:9        Constant:
0:9          1.000000
0:9          0.000000
0:9          0.000000
0:9          1.000000
0:10      move second child to first child ( temp float)
0:10        'gl_FragDepth' ( gl_FragDepth float FragDepth)
0:10        Constant:
0:10          0.500000
0:?   Linker Objects
0:?     'gl_FragDepth' ( gl_FragDepth float FragDepth)
0:?     'FragColor' (layout( location=0) out 4-component vector of float)