Keyslice mappings do not work with ";"

[braddotcoffee]

Describe the bug
I am currently attempting to remap ";;" to call a command. With other combination-based keybindings, the key mapper debugger indicates that a "key slice" is attempted to be matched for:

ModeHandler: debug: handling key=t.
index.js:30
Remapper: debug: trying to find matching remap. keys=t. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=t. keySlice=t.
index.js:30
Remapper: debug: trying to find matching remap. keys=t. mode=Normal. keybindings=normalModeKeyBindingsNonRecursiveMap.
index.js:30
ModeHandler: debug: handling key=t.
index.js:30
Remapper: debug: trying to find matching remap. keys=t,t. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=t,t. keySlice=tt.
index.js:30
Remapper: debug: normalModeKeyBindingsMap. match found. before=t,t. after=undefined. command=[object Object].

For the semicolon key, however, this is not the case:

ModeHandler: debug: handling key=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=;. keySlice=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsNonRecursiveMap.
index.js:30
ModeHandler: debug: handling key=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=;. keySlice=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsNonRecursiveMap.

Conversely if you instead remap leader to ";", then remap to "", all works correctly:

Remapper: debug: trying to find matching remap. keys=j. mode=Normal. keybindings=normalModeKeyBindingsNonRecursiveMap.
index.js:30
ModeHandler: debug: handling key=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=;. keySlice=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;. mode=Normal. keybindings=normalModeKeyBindingsNonRecursiveMap.
index.js:30
ModeHandler: debug: handling key=;.
index.js:30
Remapper: debug: trying to find matching remap. keys=;,;. mode=Normal. keybindings=normalModeKeyBindingsMap.
index.js:30
Remapper: verbose: key=;,;. keySlice=;;.
index.js:30
Remapper: debug: normalModeKeyBindingsMap. match found. before=;,;. after=undefined. command=[object Object].

To Reproduce
Steps to reproduce the behavior:

1. Set "vim.debug.loggingLevelForConsole": "debug"
2. Create a keybinding for ";;":

"before": [
    ";",
    ";"
],
"commands": [
    "workbench.action.quickOpen"
]

3. Save and execute keybinding - quickOpen does not execute
4. Set "vim.leader": ";"
5. Remap keybinding:

"before": [
    "<leader>",
    "<leader>"
],
"commands": [
    "workbench.action.quickOpen"
]

6. Save and execute keybinding - quickOpen executes

Environment (please complete the following information):

• Extension (VsCodeVim) version: 1.38.0
• VSCode version: 1.10.2
• OS: Mac OSX 10.14.5

Thanks!

[sluongng]

This is something I am having issue with as well.

I use ; as leader and use f + -> (repeat with ;) a lot.

Right now if i map ; as leader, the repeat does not work, thus I needed to rebind leader back to \

Hope that this will get resolved soon.