fix: tl types: never trigger ICE on bad files

This matches the behavior of master.

Can't make a simple regression test for this one because that
would be dependent on unspecified behaviors of the parser and
type-checker.

Fixes #795.

tl

@@ -898,13 +898,11 @@ do
       env.report_types = true
 
       for i, input_file in ipairs(args["file"]) do
-         local pok, perr, err = pcall(process_module, input_file, env)
-         if not pok then
-            die("Internal Compiler Error: " .. perr)
-         end
-         if err then
-            printerr(err)
-         end
+         -- we run the type-checker even on files that produce
+         -- syntax errors; this means we run it on incomplete and
+         -- potentially inconsistent trees which may crash the
+         -- type-checker; hence, we wrap it with a pcall here.
+         pcall(process_module, input_file, env)
 
          check_collect(i)
       end