Ensure errors are flattened into strings

2 files changed, 13 insertions, 0 deletions

diff --git a/lib/lace/compiler.lua b/lib/lace/compiler.lua
index 754e680..5d43547 100644
--- a/lib/lace/compiler.lua
+++ b/lib/lace/compiler.lua
@@ -151,6 +151,13 @@ local function compile_ruleset(ctx, src, cnt)
    if not ok then
       return nil, ret
    end
+
+   if type(msg) == "table" then
+      -- TODO: Extract position information etc from error and
+      -- formulate a gorgeous multiline error message.
+      msg = msg.msg or "Empty error"
+   end
+
    return ret, msg
 end
 
diff --git a/lib/lace/engine.lua b/lib/lace/engine.lua
index b72db5f..8e93ae0 100644
--- a/lib/lace/engine.lua
+++ b/lib/lace/engine.lua
@@ -74,6 +74,12 @@ local function run_ruleset(ruleset, exec_context)
       return false, "Ruleset did not explicitly allow or deny"
    end
 
+   if type(msg) == "table" then
+      -- TODO: Extract position information etc from error and
+      -- formulate a gorgeous multiline error message.
+      msg = msg.msg or "Empty error"
+   end
+
    return ret, msg
 end