better error reporting from lua

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -1436,16 +1436,17 @@ dependencies = [
 
 [[package]]
 name = "mlua"
-version = "0.9.9"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d111deb18a9c9bd33e1541309f4742523bfab01d276bfa9a27519f6de9c11dc7"
+checksum = "9ea43c3ffac2d0798bd7128815212dd78c98316b299b7a902dabef13dc7b6b8d"
 dependencies = [
  "bstr",
+ "either",
  "erased-serde",
  "futures-util",
  "mlua-sys",
  "num-traits",
- "once_cell",
+ "parking_lot",
  "rustc-hash",
  "serde",
  "serde-value",
@@ -1453,9 +1454,9 @@ dependencies = [
 
 [[package]]
 name = "mlua-sys"
-version = "0.6.2"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ab7a5b4756b8177a2dfa8e0bbcde63bd4000afbc4ab20cbb68d114a25470f29"
+checksum = "63a11d485edf0f3f04a508615d36c7d50d299cf61a7ee6d3e2530651e0a31771"
 dependencies = [
  "cc",
  "cfg-if 1.0.0",