gdmd -run interferes with program arguments
When gdmd -run is used to run a D file in scripting mode, it runs the compiled-on-the-fly program with an additional include argument that can interfere with the program's expected command-line argument.
Minimal example attached. If I run,
gdmd -run arguments.d
... then I trigger the error written into the script, "I didn't recognize the argument you provided: -I/usr/local/include/d2".
A verbose account reveals that gdmd -run is translating to,
gdc -c arguments.d -o arguments.o gdc arguments.o -o arguments ./arguments -I/usr/local/include/d2/
... with the last statement triggering the error in the script.