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Incorrect result when logging subnormal floating-point number to console. #17500
Description
- Version: 8.9.1, 8.9.2, 9.x
- Platform: Linux d0cc2382da37 4.4.0-101-generic 124-Ubuntu SMP Fri Nov 10 18:29:59 UTC 2017 x86_64 Linux
- Subsystem: console
Logging a subnormal floating-point number to console prints -0 instead of the correct number when passed as first argument to console.log. It prints the correct number if passed in as the second argument.
Steps to reproduce:
$ node
console.log(-5e-324);
console.log('', -5e-324);
Expected output:
-5e-324
-5e-324
Actual output:
-0
-5e-324
Additional info:
I tested this code sample and can confirm incorrect output for versions 8.9.1, 8.9.2, and 9.x.
The same code sample produces the expected output in version 8.3.
Activity
[-]Incorrect result when logging subnormal floating point number to console.[/-][+]Incorrect result when logging subnormal floating-point number to console.[/+]ealmansi commentedon Dec 6, 2017
cc @jpdjere
vsemozhetbyt commentedon Dec 6, 2017
FWIW, the output in the Chrome and Node.js REPL differ here:
Node.js canary with V8 6.5:
Google Chrome 65.0.3286.0:
devsnek commentedon Dec 6, 2017
this error comes from formatNumber in util.js:
value === 0 && -1 / value === -Infinityshould fix this:BridgeAR commentedon Dec 16, 2017
This already got fixed by #17507
Closing