← Back to index | Original Bugzilla link

Bug 21606 – pow(NaN,0) gives 1 not NaN

Status: RESOLVED
Resolution: INVALID
Severity: normal
Priority: P1
Component: phobos
Product: D
Version: D2
Platform: x86_64
OS: Linux
Creation time: 2021-02-03T11:40:36Z
Last change time: 2021-03-01T14:34:49Z
Keywords: pull
Assigned to: No Owner
Creator: Berni44

Comments

Comment #0 by bugzilla — 2021-02-03T11:40:36Z

unittest { assert(isNaN(pow(float.nan,0))); assert(isNaN(pow(double.nan,0))); assert(isNaN(pow(real.nan,0))); }

Comment #1 by bugzilla — 2021-02-03T11:42:42Z

I've created a fix already, but have to wait for PR #7783 to be merged.

Comment #2 by dlang-bot — 2021-03-01T14:11:08Z

@berni44 created dlang/phobos pull request #7819 "Fix Issue 21606 - pow(NaN,0) gives 1 not NaN" fixing this issue: - Fix Issue 21606 - pow(NaN,0) gives 1 not NaN https://github.com/dlang/phobos/pull/7819

Comment #3 by bugzilla — 2021-03-01T14:34:49Z

I just found out, that this is a weird exception of the rule, that all calculations including NaNs should be NaN...