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[GR-58286] JSConstantNumericUnitNode should never be executed.
PullRequest: js/3265
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40 changes: 40 additions & 0 deletions
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graal-js/src/com.oracle.truffle.js.test/js/const_reassign_ident_global.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| /* | ||
| * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. | ||
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| * | ||
| * Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl. | ||
| */ | ||
|
|
||
| /** | ||
| * Tests correct immutable binding reassignment handling for `const` variables in the global scope | ||
| * via increment (++), decrement (--), and compound assignment operators. | ||
| */ | ||
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| const i = 4; try { i++; fail(); } catch (e) { if (!(e instanceof TypeError)) throw e; } | ||
| const j = 4; try { ++j; fail(); } catch (e) { if (!(e instanceof TypeError)) throw e; } | ||
| const k = 4; try { k--; fail(); } catch (e) { if (!(e instanceof TypeError)) throw e; } | ||
| const l = 4; try { --l; fail(); } catch (e) { if (!(e instanceof TypeError)) throw e; } | ||
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| // If binding is immutable, compound assignment should fail only after the binary operator (including both its operands) has been executed. | ||
| let side_effects = 0; | ||
| const m = {toString() { side_effects += 1; return "a"; }}; | ||
| try { | ||
| m += {toString() { side_effects += 2; return "b"; }}; | ||
| fail(); | ||
| } catch (e) { | ||
| if (!(e instanceof TypeError)) throw e; | ||
| } | ||
| if (side_effects !== 3) throw new Error(`${side_effects}`); | ||
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| // TypeError due to mixing BigInt and Number is thrown first. | ||
| const n = 1n; | ||
| try { | ||
| n += 1; | ||
| fail(); | ||
| } catch (e) { | ||
| if (!(e instanceof TypeError && e.message.includes("BigInt"))) throw e; | ||
| } | ||
|
|
||
| function fail() { | ||
| throw new Error("Expected a TypeError, but no error was thrown."); | ||
| } |
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