fix: starttext maybe incorrect

// set a safeguard of chcol

Signed-off-by: shane.xb.qian <shane.qian@foxmail.com>

diff --git a/autoload/lsp/completion.vim b/autoload/lsp/completion.vim
index 65ad42bfdad7eb50819007858fb718693e06e574..4352591eeea68655f5248d2ae9abd12e3885d3b3 100644 (file)
--- a/autoload/lsp/completion.vim
+++ b/autoload/lsp/completion.vim
@@ -90,7 +90,7 @@ export def CompletionReply(lspserver: dict<any>, cItems: any)
 
   # Get the keyword prefix before the current cursor column.
   var chcol = charcol('.')
-  var starttext = getline('.')[ : chcol - 2]
+  var starttext = chcol == 1 ? '' : getline('.')[ : chcol - 2]
   var [prefix, start_idx, end_idx] = starttext->tolower()->matchstrpos('\k*$')
   var start_col = start_idx + 1