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31 lines
1.1 KiB
Plaintext
31 lines
1.1 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// RUN: %{not} %{executable_semantics} %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
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// RUN: %{not} %{executable_semantics} --trace %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
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// AUTOUPDATE: %{executable_semantics} %s
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// CHECK: RUNTIME ERROR: {{.*}}/executable_semantics/testdata/experimental_continuation/fail_lifetime.carbon:21: undefined behavior: access to dead value 1
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package ExecutableSemanticsTest api;
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// Test that the read from x triggers an error because x is dead.
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// This test also demonstrates how by-reference free-variable capture
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// is dangerous and can happen inside continuations.
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fn capture() -> __Continuation {
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var x: i32 = 1;
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__continuation k {
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var y: i32 = x;
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}
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return k;
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}
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fn Main() -> i32 {
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var k: __Continuation = capture();
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__run k; // error, lifetime of x is over
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return 0;
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}
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