From f58f7102f7aff77366c6cd177f28693a56952c9c Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 8 Aug 2022 15:18:03 -0400
Subject: [PATCH] Provide more context when JSON decoding fails.

---
 OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm b/OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm
index 0b2ca9453..bb744507b 100644
--- a/OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm	
+++ b/OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm	
@@ -41,8 +41,9 @@ struct Chipset {
 	NSString *const tracePath = [[NSBundle bundleForClass:[self class]]
 		pathForResource:name ofType:@"json.gz" inDirectory:@"Amiga Blitter Tests"];
 	NSData *const traceData = [NSData dataWithContentsOfGZippedFile:tracePath];
-	NSArray *const trace = [NSJSONSerialization JSONObjectWithData:traceData options:0 error:nil];
-	XCTAssertNotNil(trace);
+	NSError *error;
+	NSArray *const trace = [NSJSONSerialization JSONObjectWithData:traceData options:0 error:&error];
+	XCTAssertNotNil(trace, @"JSON decoding failed with error %@", error);
 
 	using TransactionType = Amiga::Blitter<true>::Transaction::Type;