Bug 147656

Summary: Poor Error Message / Call Stack for TypeError: Cannot call a class constructor
Product: WebKit Reporter: Joseph Pecoraro <joepeck>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: bburg, ggaren, joepeck, rniwa, saam, ysuzuki
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   

Joseph Pecoraro
Reported 2015-08-04 15:27:21 PDT
* SUMMARY Poor Error Message / Call Stack for TypeError: Cannot call a class constructor. It points to the "constructor" instead of the "call" site. * TEST: 1 <script> 2 class MyClass { 3 constructor() { this.name = "name"; } 4 } 5 function OtherClass() { 6 MyClass.call(this); 7 } 8 x = new OtherClass; 9 </script> * STEPS TO REPRODUCE 1. Run attached test case => Error in console points to the "constructor" line, expected it to point to the frame above, the "call" site. TypeError: Cannot call a class constructor MyClass test.html:3 OtherClass test.html:6 (anonymous function) test.html:8 * NOTES - Inspector currently has an off by 1 error in its stack trace output which is getting corrected at the moment.
Attachments
Joseph Pecoraro
Comment 1 2015-08-04 15:28:20 PDT
Also it might be good to use the class' name if it has one. It might not though.
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