Saving show.json.jbuilder with UTF-8 BOM causes Rails error "unexpected keyword_ensure, expecting end-of-input ensure"

[MSCAU]

I am using UltraEdit 25.20 as my text editor in Windows 10. I changed save settings yesterday to get around a UTF-8 display issue. It doesn't negatively affect any other file in my project, but the Jbuilder template now fails after saving it today.

There are a number of encoding options when saving, including:

• UTF-8 (with BOM)
• UTF-8 no BOM

These are explained quite well here: https://www.ultraedit.com/support/tutorials-power-tips/ultraedit/unicode.html

The former causes a server error when trying to load the JSON from a browser (eg. localhost/widgets/123.json) with an unhelpful error message:

syntax error, unexpected keyword_ensure, expecting end-of-input ensure

The latter works fine. Given that this only seems to affect JBuilder files, I thought this might be an issue for you.

In the interim I'll choose the "no BOM" option when saving JBuilder files. I may try https://github.com/amatsuda/jb which may or may not have the same issue.

[MSCAU]

I should add that the error changes but the underlying cause is the same. I have tidied up the file and the error (when saving "with BOM") is now:

undefined local variable or method `' for #<#Class:0x000000000e46c0b8:0x000000000d3f3650>

And If I reduce it to the bare minimum:

json.(@widget, :id)

the error is:

undefined local variable or method `json' for #<#Class:0x000000000e46c0b8:0x0000000011c899f0>
Did you mean? json
JSON

[MSCAU]

Ah! Jb has the same issue with the BOM.

I was interested to read adobe/brackets#10583

I am turning off the "Write UTF-8 BOM header to all UTF-8 files when saved" option in UltraEdit. I am also turning off "Automatically detect encoding".

If anything else comes up, I'll come back to this issue.