Are you able to provide a sample program that reproduces this issue? My trivial solution seems to work ok:

package main

import "golang.org/x/tour/pic"

func Pic(dx, dy int) [][]uint8 {
    m := make([][]uint8, dy)
    for i := range m {
        m[i] = make([]uint8, dx)
    }
    return m
}

func main() {
    pic.Show(Pic)
}

I tried running my bit of code again, it turned out that I was debug printing some intermediate values and this was preventing the image from showing up. Removing the print made the image show up. This issue can be closed if this behavior is okay.

We should probably figure out a more graceful way of handling intermingling
of image data and debug prints. Yours wouldn't have been the only example.

On 10 February 2016 at 16:17, Karthik Krishnan Ramasubramanian <
notifications@github.com> wrote:

I tried running my bit of code again, it turned out that I was debug
printing some intermediate values and this was preventing the image from
showing up. Removing the print made the image show up. This issue can be
closed if this behavior is okay.

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Reply to this email directly or view it on GitHub
#14206 (comment).

Hi @doublek - Can you mention what are the debug statements that you added that was preventing the image from being shown ? A code example would be really appreciated.