Re: SIG11 crashing - can't figure it out
On Friday, 15 May 2015 at 11:08:06 UTC, Rob Pieké wrote:
Working my way through Ali Çehreli's rather amazing e-book,
I've hit a snag where some code I've written is pretty crashy.
I consistently get Segmentation fault: 11 (dmd 2.067.1, OSX).
I can't figure out where things are going wrong, because any
attempt I make to debug via extra print statements causes the
program to run successfully. Same if I try to compile with
-gc ... it suddenly starts working, so I can't debug with gdb.
Putting aside any that's probably not a great solution to the
problem you're tying to solve thoughts, can anyone offer me
the eureka moment I'm missing to understand why the code
below doesn't work?
Many thanks in advance!
* * *
import std.stdio;
enum Suit {
HEARTS, DIAMONDS, CLUBS, SPADES
}
enum Value {
ACE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN,
JACK, QUEEN, KING
}
struct Card {
Value value;
Suit suit;
}
void printCard(in Card card) {
final switch(card.value) {
case Value.ACE:
write(A);
break;
case Value.TWO, Value.THREE, Value.FOUR, Value.FIVE,
Value.SIX, Value.SEVEN, Value.EIGHT, Value.NINE, Value.TEN:
writef(%d, card.value);
break;
case Value.JACK:
write(J);
break;
case Value.QUEEN:
write(Q);
break;
case Value.KING:
write(K);
break;
}
final switch(card.suit) {
case Suit.HEARTS:
write(♡);
break;
case Suit.DIAMONDS:
write(♢);
break;
case Suit.CLUBS:
write(♣);
break;
case Suit.SPADES:
write(♠);
break;
}
write(\n);
}
int main() {
auto card = Card(Value.JACK, Suit.CLUBS);
printCard(card);
return 0;
}
It seems to be DMD specific, it works fine with ldc. If you're a
homebrew user, brew install ldc and try it for yourself.
P.s. you can use the `with` statement to make things less verbose:
import std.stdio;
enum Suit {
HEARTS, DIAMONDS, CLUBS, SPADES
}
enum Value {
ACE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN,
JACK, QUEEN, KING
}
struct Card {
Value value;
Suit suit;
}
void printCard(in Card card) {
final switch(card.value) with(Value) {
case ACE:
write(A);
break;
case TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN:
writef(%d, card.value);
break;
case JACK:
write(J);
break;
case QUEEN:
write(Q);
break;
case KING:
write(K);
break;
}
final switch(card.suit) with(Suit) {
case HEARTS:
write(♡);
break;
case DIAMONDS:
write(♢);
break;
case CLUBS:
write(♣);
break;
case SPADES:
write(♠);
break;
}
write(\n);
}
void main() {
auto card = Card(Value.JACK, Suit.CLUBS);
printCard(card);
}
Re: SIG11 crashing - can't figure it out
On Friday, 15 May 2015 at 11:44:32 UTC, John Colvin wrote:
On Friday, 15 May 2015 at 11:08:06 UTC, Rob Pieké wrote:
Working my way through Ali Çehreli's rather amazing e-book,
I've hit a snag where some code I've written is pretty crashy.
I consistently get Segmentation fault: 11 (dmd 2.067.1, OSX).
I can't figure out where things are going wrong, because any
attempt I make to debug via extra print statements causes the
program to run successfully. Same if I try to compile with
-gc ... it suddenly starts working, so I can't debug with
gdb.
Putting aside any that's probably not a great solution to the
problem you're tying to solve thoughts, can anyone offer me
the eureka moment I'm missing to understand why the code
below doesn't work?
Many thanks in advance!
* * *
import std.stdio;
enum Suit {
HEARTS, DIAMONDS, CLUBS, SPADES
}
enum Value {
ACE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE,
TEN, JACK, QUEEN, KING
}
struct Card {
Value value;
Suit suit;
}
void printCard(in Card card) {
final switch(card.value) {
case Value.ACE:
write(A);
break;
case Value.TWO, Value.THREE, Value.FOUR, Value.FIVE,
Value.SIX, Value.SEVEN, Value.EIGHT, Value.NINE, Value.TEN:
writef(%d, card.value);
break;
case Value.JACK:
write(J);
break;
case Value.QUEEN:
write(Q);
break;
case Value.KING:
write(K);
break;
}
final switch(card.suit) {
case Suit.HEARTS:
write(♡);
break;
case Suit.DIAMONDS:
write(♢);
break;
case Suit.CLUBS:
write(♣);
break;
case Suit.SPADES:
write(♠);
break;
}
write(\n);
}
int main() {
auto card = Card(Value.JACK, Suit.CLUBS);
printCard(card);
return 0;
}
It seems to be DMD specific, it works fine with ldc. If you're
a homebrew user, brew install ldc and try it for yourself.
P.s. you can use the `with` statement to make things less
verbose:
import std.stdio;
enum Suit {
HEARTS, DIAMONDS, CLUBS, SPADES
}
enum Value {
ACE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN,
JACK, QUEEN, KING
}
struct Card {
Value value;
Suit suit;
}
void printCard(in Card card) {
final switch(card.value) with(Value) {
case ACE:
write(A);
break;
case TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN:
writef(%d, card.value);
break;
case JACK:
write(J);
break;
case QUEEN:
write(Q);
break;
case KING:
write(K);
break;
}
final switch(card.suit) with(Suit) {
case HEARTS:
write(♡);
break;
case DIAMONDS:
write(♢);
break;
case CLUBS:
write(♣);
break;
case SPADES:
write(♠);
break;
}
write(\n);
}
void main() {
auto card = Card(Value.JACK, Suit.CLUBS);
printCard(card);
}
Please submit a bug report at issues.dlang.org
Re: SIG11 crashing - can't figure it out
https://issues.dlang.org/show_bug.cgi?id=14587 And confirmed that ldc2 seems to work, thanks again :)
Re: SIG11 crashing - can't figure it out
Thanks John, I'll log the issue and start brewing ldc. I'm happy that I wasn't doing something obviously stupid with my code (again, in terms of crashing, not design). And also thanks for the with tip! - Rob
Re: SIG11 crashing - can't figure it out
On 5/15/15 7:08 AM, Rob =?UTF-8?B?UGlla8OpIg==?= robpi...@gmail.com
wrote:
Working my way through Ali Çehreli's rather amazing e-book, I've hit a
snag where some code I've written is pretty crashy. I consistently get
Segmentation fault: 11 (dmd 2.067.1, OSX).
Using dustmite (and 2.067.0), I reduced it to this:
enum Suit {
DIAMONDS, CLUBS}
enum Value {
ACE , TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK,
QUEEN, KING
}
struct Card {
Value value;
Suit suit;
}
void printCard(Card card) {
final switch(card.value) {
case Value.ACE:
;
case Value.TWO, Value.THREE, Value.FOUR, Value.FIVE, Value.SIX,
Value.SEVEN, Value.EIGHT, Value.NINE, Value.TEN:
;
case Value.JACK:
;
case Value.QUEEN:
;
case Value.KING:
;
}
}
int main() {
auto card = Card(Value.JACK, Suit.CLUBS);
printCard(card);
return 0;
}
But before I figured out how to use dustmite (it was my first time), I
hand reduced it to this:
struct Card {
int value;
int suit;
}
void foo(Card card) {
switch(card.value) {
case 4: case 5: case 6: case 11:
break;
default:
}
}
void main() {
auto card = Card(11, 1);
foo(card);
}
I see you filed a bug, I'll update with the reduced case.
-Steve
