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x/tools/present: .play snippet don't handle inserted newlines when using the Enter key. #9011

gopherbot opened this issue Oct 28, 2014 · 2 comments


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@gopherbot gopherbot commented Oct 28, 2014

by smyrman:

Before filing a bug, please check whether it has been fixed since the
latest release. Search the issue tracker and check that you're running the
latest version of Go:

Run "go version" and compare against  If a newer version of Go exists,
install it and retry what you did to reproduce the problem.


What does 'go version' print?

go version go1.3.3 linux/amd64

What steps reproduce the problem?

Using the following configuration:
- OS: Arch Linux
- Web browser: Chrome Version 38.0.2125.104 (64-bit)
- Keyboard layout: US Internationl AltGr Unicode combining

1. Edit the code in a present ".play" snippet.
2. Add a new code line by using Enter (not shift enter).
3.  Click Run...

If possible, include a link to a program on

What happened?

The compiler don't detect the newline added by Enter, and the snippet compilation fails.

    prog.go:10: syntax error: unexpected name, expecting semicolon or newline or }
    [process exited with non-zero status]
    Program exited.

What should have happened instead?

The newline should have been detected, and the program should have compiled.

Please provide any additional information below.

I tested to use Chrome Inspect elements, and I can see that using
"shift+Enter" and "Enter", have slightly different effect on the
edited HTML.

Adding a line with Shift + Enter works, and the snippet runs. Adding a file with just
Enter, creates a new "<pre>", element, and the snipet don't run (unless
semicolons are manually adde to the end of the line).


  1. original.png (13618 bytes)
  2. added_line_with_shift_enter.png (14761 bytes)
  3. added_line_with_just_enter.png (21574 bytes)
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@ianlancetaylor ianlancetaylor commented Oct 28, 2014

Comment 1:

Labels changed: added repo-tools, release-none.

@bradfitz bradfitz removed the new label Dec 18, 2014
@rsc rsc added this to the Unplanned milestone Apr 10, 2015
@rsc rsc removed the release-none label Apr 10, 2015
@rsc rsc changed the title .play snippet don't handle inserted newlines when using the Enter key. x/tools/present: .play snippet don't handle inserted newlines when using the Enter key. Apr 14, 2015
@rsc rsc modified the milestones: Unreleased, Unplanned Apr 14, 2015
@rsc rsc removed the repo-tools label Apr 14, 2015
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@jub0bs jub0bs commented Apr 14, 2021

Is there any update on this?

I've just hit the same issue (though the error message I typically get when adding a line by pressing simply Enter is different from the OP).

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5 participants