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Original file line number	Diff line number	Diff line change
`@@ -4455,10 +4455,9 @@ codegen_case_match(codegen_scope s, node varnode, int val)`
`4455`	`4455`	`current_in = current_in->cdr;`
`4456`	`4456`	`}`
`4457`	`4457`
`4458`		`-/* No pattern matched - generate nil or error */`
`4459`		`-if (val) {`
`4460`		`-genop_1(s, OP_LOADNIL, cursp());`
`4461`		`- }`
	`4458`	`+/* No pattern matched - raise NoMatchingPatternError */`
	`4459`	`+genop_1(s, OP_LOADFALSE, cursp());`
	`4460`	`+genop_1(s, OP_MATCHERR, cursp());`
`4462`	`4461`
`4463`	`4462`	`/* Dispatch all end jumps */`
`4464`	`4463`	`if (case_end_jumps != JMPLINK_START) {`

Original file line number	Diff line number	Diff line change
`@@ -1246,12 +1246,13 @@ def self.cs3(x) = s3 x + 1`
`1246`	`1246`	`assert_true e.message.is_a?(String)`
`1247`	`1247`	`end`
`1248`	`1248`
`1249`		`-# case/in without else returns nil (no match)`
`1250`		`-result = case 5`
`1251`		`-in 1 then :one`
`1252`		`-in 2 then :two`
	`1249`	`+# case/in without else raises NoMatchingPatternError`
	`1250`	`+assert_raise(NoMatchingPatternError) do`
	`1251`	`+case 5`
	`1252`	`+in 1 then :one`
	`1253`	`+in 2 then :two`
	`1254`	`+end`
`1253`	`1255`	`end`
`1254`		`-assert_nil result`
`1255`	`1256`	`end`
`1256`	`1257`
`1257`	`1258`	`assert('pattern matching - complex patterns') do`