diff --git a/.roc-version b/.roc-version
index 3d3c749..1943c53 100644
--- a/.roc-version
+++ b/.roc-version
@@ -1 +1 @@
-nightly-2026-09-19-d025939
+nightly-2026-09-28-9927ba8
\ No newline at end of file
diff --git a/ci_scripts/expect_scripts/ErrorHandlingRealWorld.exp b/ci_scripts/expect_scripts/ErrorHandlingRealWorld.exp
index 80322a2..19003b8 100644
--- a/ci_scripts/expect_scripts/ErrorHandlingRealWorld.exp
+++ b/ci_scripts/expect_scripts/ErrorHandlingRealWorld.exp
@@ -3,7 +3,8 @@
 # uncomment line below for debugging
 # exp_internal 1
 
-set timeout 7
+# Generous timeout: this example does a real HTTP request
+set timeout 30
 
 source ./ci_scripts/expect_scripts/shared-code.exp
 
@@ -11,9 +12,19 @@ set env(HELLO) 1
 
 spawn ./examples/ErrorHandlingRealWorld/main "https://www.roc-lang.org" roc.html
 
-expect "Done\r\n" {
-    expect eof {
-        check_exit_and_segfault
+expect {
+    "Done\r\n" {
+        expect eof {
+            check_exit_and_segfault
+        }
+    }
+    timeout {
+        puts stderr "\nError: timed out after $timeout seconds waiting for \"Done\"."
+        exit 1
+    }
+    eof {
+        puts stderr "\nError: program exited before printing \"Done\". wait status: [wait]"
+        exit 1
     }
 }
 
diff --git a/ci_scripts/expect_scripts/ImportPackageFromModule.exp b/ci_scripts/expect_scripts/ImportPackageFromModule.exp
index 82de1c0..1c835ea 100644
--- a/ci_scripts/expect_scripts/ImportPackageFromModule.exp
+++ b/ci_scripts/expect_scripts/ImportPackageFromModule.exp
@@ -10,7 +10,7 @@ source ./ci_scripts/expect_scripts/shared-code.exp
 spawn ./examples/ImportPackageFromModule/main
 
 expect {
-    -re {Ok\(\["h", "e", "l", "l", "o"\]\)\r\n} {
+    -re {\["h", "e", "l", "l", "o"\]\r\n} {
         expect eof {
             check_exit_and_segfault
         }
diff --git a/examples/AllSyntax/main.roc b/examples/AllSyntax/main.roc
index 6b15d95..ce343ad 100644
--- a/examples/AllSyntax/main.roc
+++ b/examples/AllSyntax/main.roc
@@ -79,7 +79,7 @@ match_tag_union_advanced = |try|
 
 		Err(_) =>
 			"Unknown error"
-		}
+	}
 
 multiline_str : U64 -> Str
 multiline_str = |number|
diff --git a/examples/CommandLineArgsFile/main.roc b/examples/CommandLineArgsFile/main.roc
index 0ae2a54..cc2de9e 100644
--- a/examples/CommandLineArgsFile/main.roc
+++ b/examples/CommandLineArgsFile/main.roc
@@ -1,7 +1,7 @@
 # Run with `roc ./examples/CommandLineArgsFile/main.roc -- examples/CommandLineArgsFile/input.txt`
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdout
@@ -10,8 +10,7 @@ import cli.File
 import cli.Path
 
 run! = |args| {
-	# get the second argument, the first is the executable's path
-	first_arg = List.get(args, 1) ? |_| ZeroArgsGiven
+	first_arg = List.get(args, 0) ? |_| ZeroArgsGiven
 
 	reader = File.open_reader!(Path.from_os_str(first_arg)) ? |err| FileReadFailed(first_arg, err)
 	file_first_line_utf8 = reader.read_line!() ? |err| FileReadFailed(first_arg, err)
diff --git a/examples/Commands/main.roc b/examples/Commands/main.roc
index 1d1028c..c6a5889 100644
--- a/examples/Commands/main.roc
+++ b/examples/Commands/main.roc
@@ -1,6 +1,6 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdout
diff --git a/examples/EncodeDecode/main.roc b/examples/EncodeDecode/main.roc
index 8915415..8c793a8 100644
--- a/examples/EncodeDecode/main.roc
+++ b/examples/EncodeDecode/main.roc
@@ -40,7 +40,7 @@ ItemKind := [
 		}
 	}
 
-	parser_for : encoding -> (state -> Try({ value : ItemKind, rest : state }, [TooShort, InvalidJson(Str), ..]))
+	parser_for : encoding -> (state -> Try({ value : ItemKind, rest : state }, [TooShort, InvalidJson(Str)]))
 		where [
 			encoding.parse_u32 : encoding, state -> Try({ value : U32, rest : state }, [InvalidJson(Str)]),
 		]
diff --git a/examples/ErrorHandlingBasic/ErrorHandlingBasic.roc b/examples/ErrorHandlingBasic/ErrorHandlingBasic.roc
index efef33a..cf4cd22 100644
--- a/examples/ErrorHandlingBasic/ErrorHandlingBasic.roc
+++ b/examples/ErrorHandlingBasic/ErrorHandlingBasic.roc
@@ -1,6 +1,6 @@
 Person : { first_name : Str, last_name : Str, birth_year : U16 }
 
-parse_person : Str -> Try(Person, [InvalidSentenceFormat(Str), InvalidNameFormat(Str), InvalidBirthYearFormat(Str), ..])
+parse_person : Str -> Try(Person, [InvalidSentenceFormat(Str), InvalidNameFormat(Str), InvalidBirthYearFormat(Str)])
 parse_person = |line| {
 	{ before: full_name, after: birth_year_str } =
 	# The NotFound error is not very informative, so we discard it with `_` and provide our own.
diff --git a/examples/ErrorHandlingRealWorld/main.roc b/examples/ErrorHandlingRealWorld/main.roc
index 83abf95..0b01930 100644
--- a/examples/ErrorHandlingRealWorld/main.roc
+++ b/examples/ErrorHandlingRealWorld/main.roc
@@ -1,6 +1,6 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdout
@@ -52,7 +52,7 @@ run! = |args| {
 
 parse_args! = |args| {
 	match args {
-		[_, first_arg, second_arg, ..] => {
+		[first_arg, second_arg, ..] => {
 			url = OsStr.display(first_arg)
 			Ok({ url, output_path: Path.from_os_str(second_arg) })
 		}
diff --git a/examples/HelloWeb/main.roc b/examples/HelloWeb/main.roc
index 909b87b..60b7794 100644
--- a/examples/HelloWeb/main.roc
+++ b/examples/HelloWeb/main.roc
@@ -14,10 +14,10 @@ program = { init!, respond!, shutdown! }
 # generate css by running `tailwindcss`...
 # In this case we don't have anything to initialize, so we use the default
 # config.
-init! : () => Try({ config : Server.Config, context : Context }, [Exit(I64), ..])
+init! : () => Try({ config : Server.Config, context : Context }, [Exit(I64)])
 init! = || Ok({ config: Server.default_config, context: {} })
 
-respond! : Server.Request, Context => Try(Server.Outcome, [ServerErr(Str), ..])
+respond! : Server.Request, Context => Try(Server.Outcome, [ServerErr(Str)])
 respond! = |_request, _context|
 	Ok(
 		Server.respond(
@@ -27,5 +27,5 @@ respond! = |_request, _context|
 		),
 	)
 
-shutdown! : Server.ShutdownReason, Context => Try({}, [Exit(I64), ..])
+shutdown! : Server.ShutdownReason, Context => Try({}, [Exit(I64)])
 shutdown! = |_reason, _context| Ok({})
diff --git a/examples/ImportPackageFromModule/main.roc b/examples/ImportPackageFromModule/main.roc
index bfded02..938ca3c 100644
--- a/examples/ImportPackageFromModule/main.roc
+++ b/examples/ImportPackageFromModule/main.roc
@@ -1,8 +1,8 @@
 ### start snippet header
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	unicode: "https://github.com/roc-lang/unicode/releases/download/2.0.0/9ZvqNzsNkpqFmGTeATAY3BNBD7mP41jqZx2w2N19tBvh.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	unicode: "https://github.com/roc-lang/unicode/releases/download/4.2.0/4W8SHzvwet9hH9qZewJ1J1CVQoH7YKA6zyijWFTB3y1w.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 ### end snippet header
diff --git a/examples/Json/main.roc b/examples/Json/main.roc
index 5ca1fab..6cc0e55 100644
--- a/examples/Json/main.roc
+++ b/examples/Json/main.roc
@@ -31,7 +31,7 @@ main! = |args| {
 			\\    "width": 800
 			\\  }
 			\\}
-		}
+	}
 
 	decoded : Try(ImageRequest, _)
 	decoded = Json.parse(input_str)
diff --git a/examples/LoopEffect/main.roc b/examples/LoopEffect/main.roc
index ba5db5a..6455141 100644
--- a/examples/LoopEffect/main.roc
+++ b/examples/LoopEffect/main.roc
@@ -1,6 +1,6 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdin
@@ -30,7 +30,7 @@ run! = || {
 	Stdout.line!("Sum: ${sum.to_str()}")
 }
 
-main! : List(OsStr) => Try({}, [Exit(I32), ..])
+main! : List(OsStr) => Try({}, [Exit(I32)])
 main! = |_args| {
 	match run!() {
 		Ok({}) => Ok({})
diff --git a/examples/Parser/main.roc b/examples/Parser/main.roc
index 58b5093..c5ae2cb 100644
--- a/examples/Parser/main.roc
+++ b/examples/Parser/main.roc
@@ -1,7 +1,7 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
 	parser: "https://github.com/lukewilliamboswell/roc-parser/releases/download/1.0.2/FrnJ4RGDKpQyoDyESNoBwFNviY4ZGbMVLnUjW9tvSRjk.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdout
@@ -12,7 +12,7 @@ import parser.String exposing [parse_str, codeunit, any_codeunit]
 
 default_input_str = "ABRACADABRA"
 
-main! : List(OsStr) => Try({}, [Exit(I32), ..])
+main! : List(OsStr) => Try({}, [Exit(I32)])
 main! = |args| {
 	input_str = args.map(OsStr.display).get(1) ?? default_input_str
 
diff --git a/examples/RandomNumbers/main.roc b/examples/RandomNumbers/main.roc
index 0b7185e..64c4c52 100644
--- a/examples/RandomNumbers/main.roc
+++ b/examples/RandomNumbers/main.roc
@@ -1,16 +1,15 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
 	rand: "https://github.com/kili-ilo/roc-random/releases/download/0.9.2/2ZXLX8WRqrosGu1V3VL5aXqgtfTRvJmjFPx8a26ecVmc.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdout
 import cli.OsStr
 import rand.Random
 
-main! : List(OsStr) => Try({}, [Exit(I32), ..])
+main! : List(OsStr) => Try({}, [Exit(I32)])
 main! = |_args| {
-
 	# Print a list of 10 random numbers.
 	numbers_str =
 		random_numbers
diff --git a/examples/SafeMath/main.roc b/examples/SafeMath/main.roc
index 859e58d..e73789d 100644
--- a/examples/SafeMath/main.roc
+++ b/examples/SafeMath/main.roc
@@ -65,7 +65,7 @@ expect safe_variance([4, 22, 99, 204, 18, 20]) == Ok(5032.138888888888888888)
 expect safe_variance([46, 69, 32, 60, 52, 41]) == Ok(147.666666666666666666)
 
 # The following function should soon be available in the Roc builtins
-times_try : Dec, Dec -> Try(Dec, [Overflow, ..])
+times_try : Dec, Dec -> Try(Dec, [Overflow])
 times_try = |a, b| {
 	result = a.times_saturated(b)
 	if result == Dec.lowest or result == Dec.highest {
diff --git a/examples/Snake/main.roc b/examples/Snake/main.roc
index 6f1656c..000ed85 100644
--- a/examples/Snake/main.roc
+++ b/examples/Snake/main.roc
@@ -1,6 +1,6 @@
 app [main!] {
-	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
-	roc: "nightly-2026-09-19-d025939",
+	cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
+	roc: "nightly-2026-09-28-9927ba8",
 }
 
 import cli.Stdin
diff --git a/examples/SortStrings/main.roc b/examples/SortStrings/main.roc
index a8418a9..e6da72b 100644
--- a/examples/SortStrings/main.roc
+++ b/examples/SortStrings/main.roc
@@ -1,7 +1,7 @@
 app [main!] {
-    cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.22.2/9zUBxb1LtXYVc4eR4hAtd1WQDwBYDhM6HQdZz1UFCm2m.tar.zst",
+    cli: platform "https://github.com/roc-lang/basic-cli/releases/download/0.23.0/GNN5tt2gKdX4dhawg4915C4YB193woHFdcCkz31fhGxv.tar.zst",
     ascii: "https://github.com/Hasnep/roc-ascii/releases/download/v0.3.1/1PCTQ0tzSijxfhxDg1k_yPtfOXiAk3j283b8EWGusVc.tar.br",
-    roc: "nightly-2026-09-19-d025939",
+    roc: "nightly-2026-09-27-a3ce7f1",
 }
 
 import cli.Stdout
diff --git a/examples/TryOperatorDesugaring/main.roc b/examples/TryOperatorDesugaring/main.roc
index 9d4e680..42347d0 100644
--- a/examples/TryOperatorDesugaring/main.roc
+++ b/examples/TryOperatorDesugaring/main.roc
@@ -5,7 +5,7 @@ main! = |_| {
 }
 
 ### start snippet question
-parse_name_and_year : Str -> Try({ name : Str, birth_year : U16 }, [BadFormat, BadNumStr, ..])
+parse_name_and_year : Str -> Try({ name : Str, birth_year : U16 }, [BadFormat, BadNumStr])
 parse_name_and_year = |str| {
 	{ before: name, after: birth_year_str } = str.split_first(" was born in ") ? |_| BadFormat
 	birth_year = U16.from_str(birth_year_str)?
@@ -15,7 +15,7 @@ parse_name_and_year = |str| {
 ### end snippet question
 
 ### start snippet desugared
-parse_name_and_year_try : Str -> Try({ name : Str, birth_year : U16 }, [BadFormat, BadNumStr, ..])
+parse_name_and_year_try : Str -> Try({ name : Str, birth_year : U16 }, [BadFormat, BadNumStr])
 parse_name_and_year_try = |str| {
 	match str.split_first(" was born in ") {
 		Err(_) => Err(BadFormat)