Trying to print the module stack I observed an error in version [2019, 5, 0]
regarding the number of parent modules.
In my case $parent_modules was 182 where it should have been 2.
I could track down the observed behaviour to repeated breaks of the
recursion limit.
You should be able to observe the same by repeatedly running the
following small example within a single session:
function recurse(n, i=0) =
(i>=n)?
echo("Return from ", i, " with ", pm=$parent_modules):
let(j=i+1) // Breaks tail recursion
recurse(n, j);
module simple() {
echo(version()); // [2019, 5, 0]
echo($parent_modules); // Rises as recursions errors are detected
a=recurse(1000); // Prints pm
b=recurse(10000); // Breaks recursion limit and increases pm by 1
}
simple();
After some runs with F5 I get e.g. =>
ECHO: "Return from ", 1000, " with ", pm = 15
ERROR: Recursion detected calling function 'recurse' in file
parent_modules.scad, line 5
TRACE: called by 'recurse', in file parent_modules.scad, line 5.
When I create an empty "new" file from there e.g. with Ctrl+N
then the erroneously increased value of $parent_modules travels into the
new session.
Possibly your recursion limit is not between 1000 and 10000.
Then you would have to adapt those numbers.
The limit is not documented and it seems to depend at least
on the called function and possibly also on your machine or settings.
The observed increase of pm looks like a bug to me.
Who can confirm and/or fix this?
Trying to print the module stack I observed an error in version [2019, 5, 0]
regarding the number of parent modules.
In my case $parent_modules was 182 where it should have been 2.
I could track down the observed behaviour to repeated breaks of the
recursion limit.
You should be able to observe the same by repeatedly running the
following small example within a single session:
------------------------------------------------------------------------
function recurse(n, i=0) =
(i>=n)?
echo("Return from ", i, " with ", pm=$parent_modules):
let(j=i+1) // Breaks tail recursion
recurse(n, j);
module simple() {
echo(version()); // [2019, 5, 0]
echo($parent_modules); // Rises as recursions errors are detected
a=recurse(1000); // Prints pm
b=recurse(10000); // Breaks recursion limit and increases pm by 1
}
simple();
------------------------------------------------------------------------
After some runs with F5 I get e.g. =>
ECHO: "Return from ", 1000, " with ", pm = 15
ERROR: Recursion detected calling function 'recurse' in file
parent_modules.scad, line 5
TRACE: called by 'recurse', in file parent_modules.scad, line 5.
When I create an empty "new" file from there e.g. with Ctrl+N
then the erroneously increased value of $parent_modules travels into the
new session.
Possibly your recursion limit is not between 1000 and 10000.
Then you would have to adapt those numbers.
The limit is not documented and it seems to depend at least
on the called function and possibly also on your machine or settings.
The observed increase of pm looks like a bug to me.
Who can confirm and/or fix this?
