underscores in debug output?

[Christopher Howard]

Hi, what does the underscore character mean in this debug output?

   159:37  5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
   163:49  4 (delete ((2 . "b") (()) 1) _)
    152:9  3 (delete _ _)
    86:11  2 (skew _)
     64:6  1 (horizontal-left-link? _)
    46:11  0 (left-tree _)

Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

[Alex Vong]

Post by Christopher Howard
Hi, what does the underscore character mean in this debug output?
   159:37  5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
   163:49  4 (delete ((2 . "b") (()) 1) _)
    152:9  3 (delete _ _)
    86:11  2 (skew _)
     64:6  1 (horizontal-left-link? _)
    46:11  0 (left-tree _)
Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

My guess would be that those values are being garbage-collected. Since _
is the pattern for matching an arbitary value, it is used to denote a
garbage-collected value.

[Christopher Howard]

Ok, okay. Is there some way to affect that? Perhaps I have to use some
debug printing or stop points to see those values?

Post by Alex Vong

Post by Christopher Howard
Hi, what does the underscore character mean in this debug output?
   159:37  5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
   163:49  4 (delete ((2 . "b") (()) 1) _)
    152:9  3 (delete _ _)
    86:11  2 (skew _)
     64:6  1 (horizontal-left-link? _)
    46:11  0 (left-tree _)
Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

My guess would be that those values are being garbage-collected. Since _
is the pattern for matching an arbitary value, it is used to denote a
garbage-collected value.

[Christopher Howard]

Ok, okay. Is there some way to affect that? Perhaps I have to use some
debug printing or stop points to see those values?

Post by Alex Vong

Post by Christopher Howard
Hi, what does the underscore character mean in this debug output?
   159:37  5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
   163:49  4 (delete ((2 . "b") (()) 1) _)
    152:9  3 (delete _ _)
    86:11  2 (skew _)
     64:6  1 (horizontal-left-link? _)
    46:11  0 (left-tree _)
Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

My guess would be that those values are being garbage-collected. Since _
is the pattern for matching an arbitary value, it is used to denote a
garbage-collected value.

[Christopher Howard]

Ok, okay. Is there some way to affect that? Perhaps I have to use some
debug printing or stop points to see those values?

Post by Alex Vong

Post by Christopher Howard
Hi, what does the underscore character mean in this debug output?
   159:37  5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
   163:49  4 (delete ((2 . "b") (()) 1) _)
    152:9  3 (delete _ _)
    86:11  2 (skew _)
     64:6  1 (horizontal-left-link? _)
    46:11  0 (left-tree _)
Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

My guess would be that those values are being garbage-collected. Since _
is the pattern for matching an arbitary value, it is used to denote a
garbage-collected value.

[Matt Wette]

Post by Christopher Howard
Hi, what does the underscore character mean in this debug output?
159:37 5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (()) 1)
2) 2)
163:49 4 (delete ((2 . "b") (()) 1) _)
152:9 3 (delete _ _)
86:11 2 (skew _)
64:6 1 (horizontal-left-link? _)
46:11 0 (left-tree _)
Knowing the value of those parameters would be super helpful here, but
for some reason they have been replaced by underscores.

I'm finding you get more info if you "guild compile -O0 file.scm" your problematic code files prior to debug session.