From e18ea0daae6b7046b02cbab2284fb3fd378c3d00 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Thu, 11 Jun 2015 04:22:31 +0300
Subject: [PATCH] Better error reporting for List.

---
 artiq/py2llvm/typing.py                | 6 +++---
 lit-test/py2llvm/typing/error_unify.py | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/artiq/py2llvm/typing.py b/artiq/py2llvm/typing.py
index a9ab62ffa..fe5c2c800 100644
--- a/artiq/py2llvm/typing.py
+++ b/artiq/py2llvm/typing.py
@@ -268,9 +268,9 @@ class Inferencer(algorithm.Transformer):
         def makenotes(printer, typea, typeb, loca, locb):
             return [
                 diagnostic.Diagnostic("note",
-                    "a list of type {typea}",
-                    {"typea": printer.name(node.type)},
-                    loca),
+                    "a list element of type {typea}",
+                    {"typea": printer.name(node.elts[0].type)},
+                    node.elts[0].loc),
                 diagnostic.Diagnostic("note",
                     "a list element of type {typeb}",
                     {"typeb": printer.name(typeb)},
diff --git a/lit-test/py2llvm/typing/error_unify.py b/lit-test/py2llvm/typing/error_unify.py
index a1e8b1d8e..1140ba61f 100644
--- a/lit-test/py2llvm/typing/error_unify.py
+++ b/lit-test/py2llvm/typing/error_unify.py
@@ -9,7 +9,7 @@ a = b
 
 # CHECK-L: ${LINE:+1}: error: cannot unify int(width='a) with list(elt='b)
 [1, []]
-# CHECK-L: note: a list of type list(elt=int(width='a))
+# CHECK-L: note: a list element of type int(width='a)
 # CHECK-L: note: a list element of type list(elt='b)
 
 # CHECK-L: ${LINE:+1}: error: cannot unify int(width='a) with bool