Content assist cannot find proposals in "loop" if there is code below

Question

I had some problems with content assist this morning and decided to update eclipse. Unfortunately, that did not fix the issue, but I eventually managed to fix it. After some time though, another issue arose and I decided to completely reinstall eclipse this time, but to no avail.

Now, whenever I'm in a loop (doesn't matter which), I cannot use content assist if more code follows below. Let me give you an example.

If I use ctrl-space after this sysout, it will work,

while (true) {
    sysout
}

but if I use ctrl-space for this sysout, it will tell me that no proposals were found.

while (true) {
    sysout
    (Some code) //Can be a sysout, a mathematical expression or pretty much anything else. It will only work if the following code is another loop, an if statement or a variable declaration.
}

I've even used another workspace on this clean version of eclipse and it still doesn't work. Any help would be greatly appreciated!

Edit: The same issue appears in an if statement as well. It looks like anything that has a condition breaks my content assist

Mundy

What version of eclipse are you using? It works fine for me with 2019-06 (4.12.0) – Impulsion

I'm using the 2021-06. I've just downloaded it from their website. – Mundy

I sometimes see this if there are errors in the 'some code', otherwise it works. – Heliacal

It unfortunately doesn't change anything if there are errors or not. – Mundy

I have 2021-06 too but couldn't reproduce the issue. May be there's something specific to the code after the sysout. Try to add info to your question so it's a MCVE. – Beauteous

It only works if the code following the sysout is a variable declaration or the start of an other loop or if statment. If there is sysout, a mathematical expression or anything else, it stops working. – Mundy

Unable to reproduce it here with 2021-06. However, much may depend on where the cursor is exactly when pressing ctrl-space. I've been placing the cursor right after the sysout on the same line. It offers 2 suggestions, first is useless does nothing, second says sysout - print to standard out. Placing it inside the sysout characters prompts even more suggestions. Where is your cursor? Do you see the second suggestion about standard out? – Nutria

@Mundy Do you get "no proposals" or "sysout - print to standard out"? – Nutria

Wherever I put my cursor, it says: "no proposal found". imgur.com/a/AGeHxvq – Mundy

And even though the line under has no mistakes, it tells me this: Multiple markers at this line - Syntax error on token ".", ; expected - out cannot be resolved – Mundy

Answer 1

Unfortunately, that is indeed an issue of Eclipse 2021-06 (4.20) that happens inside conditions and loops when there is trailing code not separated by a semicolon ; (similar but not the same as in this question).

Example:

class Sample {
    void sample(String foo) {
        if (foo != null) {
            sys // content assist here
            System.out.println();
        }
    }
}

I created the minimal reproducible example above and reported it here for you:

Eclipse bug 574267 - [content assist] [regression] No content assist for templates in conditional blocks

As workaround you can add a ; after the location where to use the content assist.

Update:

After less than 4 hours after reporting a reproducible example, the issue has been fixed. So, as an alternative to the above mentioned workaround, you can wait for the upcoming release Eclipse 2021-09 (4.21) on September 15, 2021 or at least for the first milestone build of it on July 16, 2021.

Leg

Oh wow! sorry for the excessively late reply, but thank you so very much! – Mundy

Answer 2

Could it be the same as here?

(would have added comment, but too little rep)

Fagoting

Similar but not the same and not yet fixed. See my answer. – Leg

Now, it has also been fixed. See my updated answer. – Leg