On Sunday, 25 September 2022 at 03:04:45 UTC, Tejas wrote:
On Saturday, 24 September 2022 at 23:04:00 UTC, rassoc wrote:
On 9/24/22 15:28, Adam D Ruppe via Digitalmars-d-learn wrote:
gdb --args ./your_program
and then it will tell you all the details you want to know
about when this happens.
Thank you for your input, Adam. Real shame that there's no
built-in compiler solution and probably never will be
according to [1]. :(
[1] https://issues.dlang.org/show_bug.cgi?id=4595
AFAIK diagnostics like that are not possible because Walter
doesn't want to implement full blown dataflow analysis in the
compiler since it will slow down the compilation speed of dmd
Implementing such a diagnostic is equivalent, in the general
case, to solving the halting problem. So even with dataflow
analysis, there would always be cases where the compiler either
fails to detect a potential null dereference (false negative), or
detects one that can't actually happen at runtime (false
positive).
