From a5d25fabdaf7e68f375874b9bda402acaeb9545d Mon Sep 17 00:00:00 2001
From: John Schmidt <3405586+schmee@users.noreply.github.com>
Date: Fri, 10 Feb 2023 14:46:29 +0100
Subject: translate_c: fix typedeffed pointer subtraction

Closes #14560.
---
 src/translate_c.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/translate_c.zig b/src/translate_c.zig
index a6715d161c..7fd4b93821 100644
--- a/src/translate_c.zig
+++ b/src/translate_c.zig
@@ -1748,7 +1748,8 @@ fn transBinaryOperator(
         const lhs_expr = stmt.getLHS();
         const lhs_qt = getExprQualType(c, lhs_expr);
         const lhs_qt_translated = try transQualType(c, scope, lhs_qt, lhs_expr.getBeginLoc());
-        const elem_type = lhs_qt_translated.castTag(.c_pointer).?.data.elem_type;
+        const c_pointer = getContainer(c, lhs_qt_translated).?;
+        const elem_type = c_pointer.castTag(.c_pointer).?.data.elem_type;
         const sizeof = try Tag.sizeof.create(c.arena, elem_type);
 
         const bitcast = try Tag.bit_cast.create(c.arena, .{ .lhs = ptrdiff_type, .rhs = infixOpNode });
-- 
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