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Bug introduced in 11.0.1 and fixed in 11.1.0


I have a streamplot I want to look at like so:

StreamPlot[{x - y, y^2}, {x, 0, 1}, {y, 0, 1}, StreamStyle -> "Line"]

enter image description here

In 11.0.0 I used to be able to do

v = {x - y, y^2};
StreamPlot[v, {x, 0, 1}, {y, 0, 1}, StreamStyle -> "Line"]

and obtain the exact same plot. However, now, in 11.0.1 I get

enter image description here

Long story short, StreamStyle directives are ignored in the second case. I can get things to work again by doing

StreamPlot[Evaluate[v], {x, 0, 1}, {y, 0, 1}, StreamStyle -> "Line"]

instead, but that should not be necessary. Another bug. I have this sinking feeling that I should not have "upgraded" to 11.0.1.

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  • $\begingroup$ I can confirm it works as expected in 10.4.1 but not in 11.0.1. You should report it to WRI. $\endgroup$ – Edmund Oct 13 '16 at 10:22
  • $\begingroup$ I have reported both this and the issues with VectorPlot3D, and Wolfram Support has confirmed the bugs. Hopefully fixed in the next bug fix release. $\endgroup$ – Pirx Oct 13 '16 at 13:02
  • $\begingroup$ I can confirm that the bug has been fixed in 11.1. $\endgroup$ – user58955 Mar 23 '17 at 17:45
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This is fixed in 11.1.0.

v = {x - y, y^2};
StreamPlot[v, {x, 0, 1}, {y, 0, 1}, StreamStyle -> "Line"]

enter image description here

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