From 8d999265541e28a1fa6f73364d70cc4cbcc70559 Mon Sep 17 00:00:00 2001
From: Vidar Holen <spam@vidarholen.net>
Date: Sun, 18 Oct 2020 15:15:31 -0700
Subject: [PATCH] Recognize `local -x` similarly to `export` (fixes #2069)

---
 src/ShellCheck/Analytics.hs   | 1 +
 src/ShellCheck/AnalyzerLib.hs | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/src/ShellCheck/Analytics.hs b/src/ShellCheck/Analytics.hs
index c39f8c8..e5287f8 100644
--- a/src/ShellCheck/Analytics.hs
+++ b/src/ShellCheck/Analytics.hs
@@ -2134,6 +2134,7 @@ prop_checkUnused13= verifyNotTree checkUnusedAssignments "x=(1); (( x[0] ))"
 prop_checkUnused14= verifyNotTree checkUnusedAssignments "x=(1); n=0; echo ${x[n]}"
 prop_checkUnused15= verifyNotTree checkUnusedAssignments "x=(1); n=0; (( x[n] ))"
 prop_checkUnused16= verifyNotTree checkUnusedAssignments "foo=5; declare -x foo"
+prop_checkUnused16b= verifyNotTree checkUnusedAssignments "f() { local -x foo; foo=42; bar; }; f"
 prop_checkUnused17= verifyNotTree checkUnusedAssignments "read -i 'foo' -e -p 'Input: ' bar; $bar;"
 prop_checkUnused18= verifyNotTree checkUnusedAssignments "a=1; arr=( [$a]=42 ); echo \"${arr[@]}\""
 prop_checkUnused19= verifyNotTree checkUnusedAssignments "a=1; let b=a+1; echo $b"
diff --git a/src/ShellCheck/AnalyzerLib.hs b/src/ShellCheck/AnalyzerLib.hs
index c9954d1..724857c 100644
--- a/src/ShellCheck/AnalyzerLib.hs
+++ b/src/ShellCheck/AnalyzerLib.hs
@@ -547,6 +547,9 @@ getReferencedVariableCommand base@(T_SimpleCommand _ _ (T_NormalWord _ (T_Litera
                     (not $ any (`elem` flags) ["f", "F"])
             then concatMap getReference rest
             else []
+        "local" -> if "x" `elem` flags
+            then concatMap getReference rest
+            else []
         "trap" ->
             case rest of
                 head:_ -> map (\x -> (base, head, x)) $ getVariablesFromLiteralToken head