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Linus Torvalds: "GCC 4.9.0 Seems To Be Terminally Broken"

david_thornley Re:Oe noes! A compiler bug! (635 comments)

That isn't a correctness issue. That's a quality-of-code issue, and I've seen lots of compilers not have warnings for things I thought they should have warnings of.

Does that code result in a warning in every conceivable Java compiler?

yesterday
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Linus Torvalds: "GCC 4.9.0 Seems To Be Terminally Broken"

david_thornley Re:Oe noes! A compiler bug! (635 comments)

The problem isn't that every popular compiler in the world has extensions. The problem is that its users tend to think that just because it compiles with any popular compiler in the world it's portable.

FTFY.

yesterday
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Linus Torvalds: "GCC 4.9.0 Seems To Be Terminally Broken"

david_thornley Re:Oe noes! A compiler bug! (635 comments)

Linus blasted the code. If that counts as "emotionally abusive" to you, you're too attached to your code and lack the objectivity necessary to be a great programmer.

yesterday
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Linus Torvalds: "GCC 4.9.0 Seems To Be Terminally Broken"

david_thornley Re:Or upgrade to llvm ... (635 comments)

There's much to be said for insisting that the kernel should compile and run fine with either compiler. That way, it can't depend on some odd interpretation of the language spec.

yesterday
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The Truth About Solar Storms

david_thornley Re:The failure mode is transformer core saturation (90 comments)

The current best way to make a large EMP, which is what we're looking for, is to burst a large thermonuclear bomb high over the target. That's going to have a whole lot of other consequences, and the people launching it are in real trouble.

2 days ago
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The Truth About Solar Storms

david_thornley Re:More CS Majors ... (90 comments)

If we get more English majors, maybe we can get people to type grammatically.

2 days ago
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How a Solar Storm Two Years Ago Nearly Caused a Catastrophe On Earth

david_thornley Re:USA USA (212 comments)

No, we don't need any of that. We'll just attack at night.

3 days ago
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Man Booted From Southwest Flight and Threatened With Arrest After Critical Tweet

david_thornley Re:name and location tweeted... (872 comments)

I don't think anybody helping customers out expects to be laid at all. It could be a leftover from when that might work, so guys are genetically programmed to be nicer to women than to men.

3 days ago
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Man Booted From Southwest Flight and Threatened With Arrest After Critical Tweet

david_thornley Re:this story is missing information (872 comments)

Except that I'm not confident in TFA. Whenever I see a provocative account of something from one person's viewpoint, I suspect it of not being entirely honest.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:Seriously though, why a singularity? (224 comments)

There is no such force as gravity. There is only Newton's first law in curved spacetime. I am currently on a straight path in spacetime that takes me closer to the center of the earth, and this chair keeps using electromagnetic force to push me out of my path onto another one. Falling is natural. (It's also harmless, although the withdrawal symptoms can be nasty.) Gravity is just as much of a fiction as centrifugal force, and for the same reason.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:Do Slashdot editors actually edit? (224 comments)

No, you can only use an exercise machine for some intensive purposes. There's nothing that applies to all intensive purposes, except being intensive. And purposes.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:wat (224 comments)

Depends on your point of view. From my point of view, stuff slowly approaches the event horizon and never hits it. From the point of view of a guy falling into one, he's probably already torn apart by the tidal forces, so it's arguable whether he has a point of view at the event horizon. Assuming a sufficiently large black hole, so the tidal force is survivable, I think he just heads in and doesn't necessarily notice the event horizon as anything special.

Unlike what we've seen on Star Trek: Voyager, the event horizon isn't a solid thing that allows Voyager to move around within freely.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:wat (224 comments)

A lot of infinities and discontinuities are found where the math breaks down for some reason. Any two-dimensional mapping of the Earth is going to have discontinuities, for example, but the planet surface is roughly the same wherever you go. That doesn't mean they all are. There's a lot of thinking that some subatomic particles are points, which means that since they have mass, they would have infinite density.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:Correct: many phenoma in astrophysics are ideas (224 comments)

Yeah. And we could also be green-skinned with bad eyes. Nothing is scientifically proven, but there's things we're pretty darn sure of.

Dark matter? There's matter there, and we can't detect it by any electromagnetic means. It doesn't interact with photons. That seems pretty definite. Exactly what it is is another question. We don't know that it's the suggested weakly interacting massive particles, but that's where we seem to be looking at the moment.

Speed of light limitation? We actually don't have such a thing in Special Relativity. What we have is an equivalence of FTL and time travel. We do know, by ridiculously large numbers of observations, that you can't get something quite to the speed of light by accelerating it a whole lot. Neutrinos have got to have incredibly low actual mass, since they travel so very close to light speed without all that much energy involved. We are multiplying a really small number (neutron mass) by a really large number (the relativistic factor) and getting something more reasonable.

Big bang? There's a whole lot of evidence for that. The Universe has changed over time, running things backwards seems to result in a big crunch, and there's a lot of things the big bang predicts that we've found.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:wat (224 comments)

Excuse me, Hilbert's Hotel is infinite. That's it's definition. You want to talk about a finite hotel, you make up TemperedAlchemist's hotel or something, and what you say will be true of that.

That sum you mention is a sum of finitely many numbers. It's numbers from 1 to n, and n is expressed as finite. Therefore, it follows the normal laws of arithmetic, and shows that you can't do this trick at the downtown Hilton without pushing the penthouse occupant off the roof.

Similarly, you have room n and room 2n, where n is a finite number. If the room numbers end at n, it's not Hilbert's Hotel.

The rule is that, for any positive integer you can name, there's a room with that number, and every room has a different integer number. Any given guest is in a room with a finite number on it (or is near one in the hall). There is no last room. You seem to think that the rooms run from 1 to aleph-null, but that's not how it works. You seem to be thinking of aleph-null as a literal value.

For any positive integer n, both n + 1 and 2n are integers. (It follows that n + 2, 2n+1, 2n+2, and 4n are integers, of course.) Therefore, it's possible to move every guest from room n to room n+1, since room n+1 exists, and that leaves room 1 empty. It's also possible to move every guest from room n to room 2n, leaving the odd-numbered rooms empty.

It's true that one kind of infinity doesn't necessarily equal another kind (the number of integers and the number of real numbers are different, for example), but it's also true that no infinity equals something finite, which you were trying to do.

3 days ago
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Black Holes Not Black After All, Theorize Physicists

david_thornley Re:wat (224 comments)

The Universe tends to go on doing whatever it's doing without regard for the mathematics of it.

3 days ago
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Dropbox Head Responds To Snowden Claims About Privacy

david_thornley Re:We should add our own encryption??? (175 comments)

I like my idea for client-side encryption. I get some crypto software from a third party, preferably open source, and I encrypt stuff and then put it in the Dropbox folder. If I'm feeling paranoid, I get a cheap computer, don't connect it to anything else, and use USB sticks to move plaintext in and ciphertext out.

I wouldn't trust any feature from the vendor to do encryption and decryption on the fly. If I'm going to be cautious and secure, I'm going to do it right.

3 days ago
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Dropbox Head Responds To Snowden Claims About Privacy

david_thornley Re:Cloudy, chance of rain (175 comments)

Which is why I wouldn't put anything on Dropbox that I wouldn't want the NSA or FBI to know about. Being traceable publicly is not a problem for me; I just want the ability to do less traceable things when I want to.

3 days ago
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Dropbox Head Responds To Snowden Claims About Privacy

david_thornley Re:umm duh? (175 comments)

Probably using something like 2ROT13. Lame. I wouldn't use anything less than 4ROT13 even for low-security stuff.

3 days ago
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The Secret Government Rulebook For Labeling You a Terrorist

david_thornley Re:McCarthyism v2.0 (242 comments)

The NDAA is the National Defense Appropriation Act, IIRC. It had one very bad provision. I wasn't following what was going on, but not signing it meant that the Department of Defense would be unfunded unless something else could be hammered out. I'm thoroughly unimpressed by Obama's ability to shape legislation in Congress, so I tend not to blame problems in bills passed on him.

The IRS was trying to screen political groups who applied for tax-exempt status, and there's a fine line between tax-exempt and taxable there. I've still not seen good evidence that the IRS was deliberately picking on right-wing groups, or that there's been any deliberate interference with gathering evidence.

4 days ago

Submissions

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Apple makes iBricks

david_thornley david_thornley writes  |  more than 6 years ago

david_thornley (598059) writes "Adrian Kingsley-Hughes at ZDNet has some early reports on Apple turning iPhones into iBricks. Apparently it's happening not only to unlocked iPhones, but to standard locked iPhones where the customer hasn't done anything out of the ordinary. Once bricked, it may be possible to return it to factory settings, losing all photos, mail, contacts, and other things. This isn't good, folks. If you have iPhones of any description, except newly purchased, don't sync with the new update."

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