stream: proxy first own method in Readable.wrap()#64048
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The method-proxying loop in Readable.prototype.wrap() started at index 1, silently skipping streamKeys[0] and leaving a method at the first own-enumerable key unproxied. This was introduced in ee9e2a2 when ArrayPrototypeForEach( ObjectKeys(stream), ...) — which iterates from index 0 — was rewritten as a manual for loop for performance. The faithful translation starts at 0; a sibling loop converted in the same commit correctly does so. The bug stayed hidden because keys[0] is usually _events (a non-function), which the loop's typeof guard skips anyway. Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
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MattiasBuelens
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Jun 22, 2026
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The method-proxying loop in Readable.prototype.wrap() started at index 1, silently skipping streamKeys[0] and leaving a method at the first own-enumerable key unproxied.
This was introduced in ee9e2a2 when ArrayPrototypeForEach( ObjectKeys(stream), ...) — which iterates from index 0 — was rewritten as a manual for loop for performance. The faithful translation starts at 0; a sibling loop converted in the same commit correctly does so. The bug stayed hidden because keys[0] is usually _events (a non-function), which the loop's typeof guard skips anyway.