[Issue 17489] ICE in ddmd/argtypes.d

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17489

--- Comment #2 from greensunny12 at gmail.com ---
It seems that argtypemerge has troubles when confronted with an error:

/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/traits.d(1046,60):
Error: parameter index must be in range 0..3 not 3LU
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/traits.d(1047,25):
Error: template instance std.traits.ParameterStorageClassTuple!(void
function(FreeListRef!(shared(int), true), int delegate(int, int) pure nothrow
@nogc @safe, int, int) nothrow @nogc @system).StorageClass!3LU error
instantiating
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/traits.d(1047,25):
       instantiated from here: StorageClass!2LU
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/traits.d(1047,25):
       instantiated from here: StorageClass!1LU
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/traits.d(1052,44):
       instantiated from here: StorageClass!0LU
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/typecons.d(4273,22):
       ... (4 instantiations, -v to show) ...
source/vibe/core/concurrency.d(1146,34):        instantiated from here:
toDelegate!(void function(FreeListRef!(shared(int), true), int delegate(int,
int) pure nothrow @nogc @safe, int, int) nothrow @nogc @system)
source/vibe/core/concurrency.d(1187,15):        instantiated from here:
async!(int delegate(int, int) pure nothrow @nogc @safe, int, int)
/home/seb/dlang/dmd/generated/linux/debug/64/../../../../../phobos/std/functional.d(1224,13):
Error: CTFE failed because of previous errors in generateFunction
argtypemerge(, _error_, 0)
argtypemerge(_error_, void*, 0)
core.exception.AssertError at ddmd/argtypes.d(201): Assertion failure

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