RESOLVED WORKSFORME238149
Variable in top level block scope is incorrectly captured 
https://bugs.webkit.org/show_bug.cgi?id=238149
Summary Variable in top level block scope is incorrectly captured
neildhar
Reported 2022-03-21 12:02:05 PDT
For the following snippet placed at the top level: do { let w = "banana"; function foo(){ w = "bar"; } foo(); console.log(w); } while(0) JSC prints "banana", instead of "bar".
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Radar WebKit Bug Importer
Comment 1 2022-03-22 09:07:31 PDT
<rdar://problem/90639204>
Jarred Sumner
Comment 2 2022-05-22 02:35:05 PDT
This seems to only happen when strict mode is off. The following code doesn't reproduce the issue in jsc shell: "use strict"; do { let w = "banana"; function foo() { w = "bar"; } foo(); print(w); } while (0); But this code does: do { let w = "banana"; function foo() { w = "bar"; } foo(); print(w); } while (0);
uncomment
Comment 3 2024-02-24 00:55:46 PST
The variable is not even visible within the function: do { let w = "banana"; function foo(){ console.log(w); } foo(); } while(0) Result (unexpected): ReferenceError: Can't find variable: w Unlike with arrow function: do { let w = "banana"; foo=()=>{ console.log(w); }; foo(); } while(0) Result (as expected): banana
Yusuke Suzuki
Comment 4 2025-05-23 17:22:24 PDT
Now function declaration with the scope is implemented (instead of function statement). So it is fixed.
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