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Node 24.4.1 crashes in REPL after typing "let b" #59136
Description
Version
v24.4.1
Platform
Linux x64, MacOS aarch64
Subsystem
REPL
What steps will reproduce the bug?
Start Node.js repl by typing the following command in a terminal:
$ node
Then type in "let b". Immediately after the character "b" is entered, the REPL consistently crashes with
> let bnode:internal/readline/emitKeypressEvents:74
throw err;
^
TypeError: Cannot read properties of null (reading 'start')
at findExpressionCompleteTarget (node:repl:1722:68)
at REPLServer.complete (node:repl:1487:55)
at REPLServer.completer (node:repl:792:5)
at showCompletionPreview (node:internal/repl/utils:233:10)
at showPreview (node:internal/repl/utils:389:7)
at REPLServer.self._ttyWrite (node:repl:1037:9)
at ReadStream.onkeypress (node:internal/readline/interface:284:20)
at ReadStream.emit (node:events:507:28)
at ReadStream.emit (node:domain:489:12)
at emitKeys (node:internal/readline/utils:371:14)
Node.js v24.4.1
How often does it reproduce? Is there a required condition?
It is always reproducible on both MacOS and debian linux.
What is the expected behavior? Why is that the expected behavior?
Not to crash.
What do you see instead?
A crash.
Additional information
No response
Activity
Amirali-Amirifar commentedon Jul 20, 2025
can confirm, also on
var, but notconstRenegade334 commentedon Jul 21, 2025
Duplicate of #59029.
swisscodes commentedon Jul 27, 2025
can confirm also on windows 11
PS C:\Users\Admin> node
Welcome to Node.js v24.4.1.
Type ".help" for more information.
TypeError: Cannot read properties of null (reading 'start')
at findExpressionCompleteTarget (node:repl:1722:68)
at REPLServer.complete (node:repl:1487:55)
at REPLServer.completer (node:repl:792:5)
at showCompletionPreview (node:internal/repl/utils:233:10)
at showPreview (node:internal/repl/utils:389:7)
at REPLServer.self._ttyWrite (node:repl:1037:9)
at ReadStream.onkeypress (node:internal/readline/interface:284:20)
at ReadStream.emit (node:events:507:28)
at ReadStream.emit (node:domain:489:12)
at emitKeys (node:internal/readline/utils:371:14)
Node.js v24.4.1