What I expected to happen was by using the command /give @a[l=3,lm=3] minecraft:diamond (3 can be any number and it doesn't work with any item and it doesn't work with other arguments) it would give a level 3 player a diamond
What actually happened was
Nothing, it said it gave them a diamond but in actuality it didn't
Steps to Reproduce:
1. give yourself 3 levels
2. type /give @a [lm=3,l=3] (in chat or command block)
3. watch
Duplicate of MC-44521 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.