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#2677 — 19.2.1.1 Function, 25.2.1.1 GeneratorFunction: Invalid assertion in step 18/17

• bug_id: 2677
• creation_ts: 2014-04-17 06:59:00 -0700
• short_desc: 19.2.1.1 Function, 25.2.1.1 GeneratorFunction: Invalid assertion in step 18/17
• delta_ts: 2014-05-06 16:42:19 -0700
• product: Draft for 6th Edition
• component: technical issue
• version: Rev 23: April 5, 2014 Draft
• rep_platform: All
• op_sys: All
• bug_status: RESOLVED
• resolution: FIXED
• priority: Normal
• bug_severity: normal
• everconfirmed: true
• reporter: André Bargull
• assigned_to: Allen Wirfs-Brock

---

• commentid: 7776
• comment_count: 0
• who: André Bargull
• bug_when: 2014-04-17 06:59:17 -0700

19.2.1.1 Function ( p1, p2, … , pn, body ), step 18
25.2.1.1 GeneratorFunction (p1, p2, … , pn, body), step 17

The assertion in step 18/17 is not valid.


js> f = Function[Symbol.create]()
function F() { /* source not available */ }
js> Object.preventExtensions(f)
function F() { /* source not available */ }
js> Function.call(f, "")
java.lang.AssertionError
at com.github.anba.es6draft.runtime.objects.FunctionConstructor.call(FunctionConstructor.java:127)
at com.github.anba.es6draft.runtime.objects.FunctionConstructor.call(FunctionConstructor.java:1)
at com.github.anba.es6draft.runtime.types.builtins.BuiltinFunction.tailCall(BuiltinFunction.java:150)
at com.github.anba.es6draft.runtime.internal.TailCallInvocation.apply(TailCallInvocation.java:57)
at com.github.anba.es6draft.runtime.internal.TailCallInvocation.tailCallTrampoline(TailCallInvocation.java:107)
at com.github.anba.es6draft.runtime.types.builtins.NativeTailCallFunction.call(NativeTailCallFunction.java:64)
...


js> g = (function*(){}).constructor[Symbol.create]()
function F() { /* source not available */ }
js> Object.preventExtensions(g)
function F() { /* source not available */ }
js> (function*(){}).constructor.call(g, "")
java.lang.AssertionError
...

---

• commentid: 7788
• comment_count: 1
• who: Allen Wirfs-Brock
• bug_when: 2014-04-17 09:13:18 -0700

fixed in rev24 editor's draft

---

• commentid: 8183
• comment_count: 2
• who: Allen Wirfs-Brock
• bug_when: 2014-05-06 16:42:19 -0700

fixed in rev24