plotting - Break[] inside ColorFunction

Bug introduced in 8.0 or earlier and persisting through 11.0.1 or later

f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x)
Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)]

Break::nofwd: No enclosing For, While, or Do found for Break[].

What's going on here? I've tried setting HoldFirst attribute on f and I've also tried using Unevaluated which gives surprising results:

(* Works fine, gives plot colored as expected *)
Plot[x, {x, 0, 1}, 
 ColorFunction -> (Unevaluated[ColorData["Rainbow"][f[#1]]] &)]

(* Gives a black and white plot with error:
   "Unevaluated is not a Graphics primitive or directive" *)

ListContourPlot[IdentityMatrix[3],
  ColorFunction->(Unevaluated[ColorData["Rainbow"][f[#1]]]&)]

Edit This on the other hand works:

Plot[x,{x,0,1},ColorFunction->Function[c,ColorData["Rainbow"][f[c]]]]

Which only difference is that it uses Function[c,ColorData["Rainbow"][f[c]]]] instead of Function[ColorData["Rainbow"][f[Slot[1]]]]]

Comments

plotting - Filling between two spheres in SphericalPlot3D

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plotting - Mathematica: 3D plot based on combined 2D graphs

I have several sigmoidal fits to 3 different datasets, with mean fit predictions plus the 95% confidence limits (not symmetrical around the mean) and the actual data. I would now like to show these different 2D plots projected in 3D as in but then using proper perspective. In the link here they give some solutions to combine the plots using isometric perspective, but I would like to use proper 3 point perspective. Any thoughts? Also any way to show the mean points per time point for each series plus or minus the standard error on the mean would be cool too, either using points+vertical bars, or using spheres plus tubes. Below are some test data and the fit function I am using. Note that I am working on a logit(proportion) scale and that the final vertical scale is Log10(percentage). (* some test data *) data = Table[Null, {i, 4}]; data[[1]] = {{1, -5.8}, {2, -5.4}, {3, -0.8}, {4, -0.2}, {5, 4.6}, {1, -6.4}, {2, -5.6}, {3, -0.7}, {4, 0.04}, {5, 1.0}, {1, -6.8}, {2, -4.7}, {3, -1.

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