From 19aa51d443474fd89592a55c3d3aa0ccc5c240e2 Mon Sep 17 00:00:00 2001
From: Madan kumar <winklemad@outlook.com>
Date: Thu, 20 Aug 2026 02:46:23 +0530
Subject: [PATCH] fix: print `{#await ... catch}` et al correctly (#18645)

needs to check the error value, not the then value

---------

Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
---
 .changeset/eighty-pugs-shave.md               |  5 ++++
 packages/svelte/src/compiler/print/index.js   |  2 +-
 .../print/samples/await-block/input.svelte    | 26 +++++++++++++++++++
 .../print/samples/await-block/output.svelte   | 26 +++++++++++++++++++
 4 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/eighty-pugs-shave.md

diff --git a/.changeset/eighty-pugs-shave.md b/.changeset/eighty-pugs-shave.md
new file mode 100644
index 0000000000..0f0eaf9a6c
--- /dev/null
+++ b/.changeset/eighty-pugs-shave.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: correctly print `{#await ... catch x}` et al
diff --git a/packages/svelte/src/compiler/print/index.js b/packages/svelte/src/compiler/print/index.js
index c6964fc0b7..a3e10085de 100644
--- a/packages/svelte/src/compiler/print/index.js
+++ b/packages/svelte/src/compiler/print/index.js
@@ -763,7 +763,7 @@ const svelte_visitors = (comments, state) => ({
 		}
 
 		if (node.catch) {
-			context.write(node.value ? 'catch ' : 'catch');
+			context.write(node.error ? 'catch ' : 'catch');
 			if (node.error) context.visit(node.error);
 			context.write('}');
 
diff --git a/packages/svelte/tests/print/samples/await-block/input.svelte b/packages/svelte/tests/print/samples/await-block/input.svelte
index 10f0b3fb9e..ba0ba8c882 100644
--- a/packages/svelte/tests/print/samples/await-block/input.svelte
+++ b/packages/svelte/tests/print/samples/await-block/input.svelte
@@ -8,3 +8,29 @@
 	<!-- promise was rejected -->
 	<p>Something went wrong: {error.message}</p>
 {/await}
+
+{#await promise catch error}
+	<p>The error is {error}</p>
+{/await}
+
+{#await promise then value}
+	<p>The value is {value}</p>
+{/await}
+
+{#await promise catch}
+	<p>Something went wrong</p>
+{/await}
+
+{#await promise}
+	<p>waiting for the promise to resolve...</p>
+{:then}
+	<p>the promise resolved</p>
+{:catch error}
+	<p>The error is {error}</p>
+{/await}
+
+{#await promise}
+	<p>waiting for the promise to resolve...</p>
+{:catch}
+	<p>Something went wrong</p>
+{/await}
diff --git a/packages/svelte/tests/print/samples/await-block/output.svelte b/packages/svelte/tests/print/samples/await-block/output.svelte
index 10f0b3fb9e..ba0ba8c882 100644
--- a/packages/svelte/tests/print/samples/await-block/output.svelte
+++ b/packages/svelte/tests/print/samples/await-block/output.svelte
@@ -8,3 +8,29 @@
 	<!-- promise was rejected -->
 	<p>Something went wrong: {error.message}</p>
 {/await}
+
+{#await promise catch error}
+	<p>The error is {error}</p>
+{/await}
+
+{#await promise then value}
+	<p>The value is {value}</p>
+{/await}
+
+{#await promise catch}
+	<p>Something went wrong</p>
+{/await}
+
+{#await promise}
+	<p>waiting for the promise to resolve...</p>
+{:then}
+	<p>the promise resolved</p>
+{:catch error}
+	<p>The error is {error}</p>
+{/await}
+
+{#await promise}
+	<p>waiting for the promise to resolve...</p>
+{:catch}
+	<p>Something went wrong</p>
+{/await}