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-rw-r--r--scripts/context/lua/mtxrun.lua20
1 files changed, 13 insertions, 7 deletions
diff --git a/scripts/context/lua/mtxrun.lua b/scripts/context/lua/mtxrun.lua
index 00d4fe9c3..c678597e1 100644
--- a/scripts/context/lua/mtxrun.lua
+++ b/scripts/context/lua/mtxrun.lua
@@ -645,15 +645,21 @@ end
table.sortedkeys = sortedkeys
table.sortedhashkeys = sortedhashkeys
+local function nothing() end
+
local function sortedhash(t)
- local s = sortedhashkeys(t) -- maybe just sortedkeys
- local n = 0
- local function kv(s)
- n = n + 1
- local k = s[n]
- return k, t[k]
+ if t then
+ local s = sortedhashkeys(t) -- maybe just sortedkeys
+ local n = 0
+ local function kv(s)
+ n = n + 1
+ local k = s[n]
+ return k, t[k]
+ end
+ return kv, s
+ else
+ return nothing
end
- return kv, s
end
table.sortedhash = sortedhash