From 66f13ba80787b652ee4f26669f4f2af99e1f1ea0 Mon Sep 17 00:00:00 2001
From: Shawn Landden <shawn@git.icu>
Date: Thu, 28 Mar 2019 08:47:47 -0500
Subject: stage1: better error message when comparing against null

Closes: #2104
---
 src/ir.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/ir.cpp')

diff --git a/src/ir.cpp b/src/ir.cpp
index 3851103c1e..0833bb580c 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -12210,7 +12210,8 @@ static IrInstruction *ir_analyze_bin_op_cmp(IrAnalyze *ira, IrInstructionBinOp *
             return is_non_null;
         }
     } else if (op1->value.type->id == ZigTypeIdNull || op2->value.type->id == ZigTypeIdNull) {
-        ir_add_error_node(ira, source_node, buf_sprintf("comparison against null can only be done with optionals"));
+        ir_add_error_node(ira, source_node, buf_sprintf("only optionals (not '%s') can compare to null",
+            buf_ptr(&(op1->value.type->id == ZigTypeIdNull ? op2->value.type->name : op1->value.type->name))));
         return ira->codegen->invalid_instruction;
     }
 
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