From 9b01069eb9baa5414365c948929dd5a7547a32f7 Mon Sep 17 00:00:00 2001
From: Nikolay Yakimov <root@livid.pp.ru>
Date: Sat, 6 Jun 2020 21:56:27 +0300
Subject: [PATCH] [JS] Fix TypeError in LR parser code parsing error handler

---
 lib/Parser/LR/JS.hs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/Parser/LR/JS.hs b/lib/Parser/LR/JS.hs
index 37807da..e719d44 100644
--- a/lib/Parser/LR/JS.hs
+++ b/lib/Parser/LR/JS.hs
@@ -110,13 +110,13 @@ module.exports = {#{name}}
     }|] :: Maybe Text
     actionBody Reject = [interp|
       const lastSt = this._top()
-      const parsed = stateToString(lastSt)
+      const parsed = [stateToString(lastSt)]
       while (this.stack.length > 0) {
         this.stack.pop()
-        parsed = stateToString(this._top()) + " " + parsed
+        parsed.unshift(stateToString(this._top()))
       }
       throw new Error(
-        `Rejection state reached after parsing "${parsed}", when encoutered symbol "${tokToStr(a[0])}" in state ${lastSt}. Expected "${expectedSym(lastSt)}"`)
+        `Rejection state reached after parsing "${parsed.join(' ')}", when encoutered symbol "${tokToStr(a[0])}" in state ${lastSt}. Expected "${expectedSym(lastSt)}"`)
       |] :: Text
     actionBody (Shift _) = error "does not happen"
     actionBody (Reduce ((ExtendedStartRule, _), _)) = [interp|