std.random.uniform(1, 101) crashes. Why, and workaround.
evilrat
evilrat666 at gmail.com
Fri Jul 25 07:16:55 UTC 2025
On Friday, 25 July 2025 at 01:04:31 UTC, Brother Bill wrote:
> From "Programming in D" book:
>
> import std.stdio;
> import std.random;
>
> void main() {
> int number = uniform(1, 101);
>
> writeln("Edit source/app.d to start your project.");
> }
>
> Running it generates:
> phobos64.lib(random_6ea_855.obj) : error LNK2019:
> unresolved external symbol BCryptGenRandom referenced in
> function _D3std6random__T15bcryptGenRandomTmZQuFNbNiNeJmZb
>
> C:\Users\broth\AppData\Local\Temp\.rdmd\rdmd-app.d-99D1A2446E2CA5089AD8A9B31EA74F07\app.exe.tmp : fatal error LNK1120: 1 unresolved externals
> Error: linker exited with status 1120
> C:\Program Files\Microsoft Visual
> Studio\2022\Community\VC\Tools\MSVC\14.44.35207\bin\HostX64\x64\link.exe /NOLOGO "C:\Users\broth\AppData\Local\Temp\.rdmd\rdmd-app.d-99D1A2446E2CA5089AD8A9B31EA74F07\objs\app.exe.obj" /OUT:"C:\Users\broth\AppData\Local\Temp\.rdmd\rdmd-app.d-99D1A2446E2CA5089AD8A9B31EA74F07\app.exe.tmp" /DEFAULTLIB:phobos64 /LIBPATH:"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\lib\x64" legacy_stdio_definitions.lib /LIBPATH:"C:\Program Files (x86)\Windows Kits\10\Lib\10.0.26100.0\ucrt\x64" /LIBPATH:"C:\Program Files (x86)\Windows Kits\10\lib\10.0.26100.0\um\x64"
> Error: undefined reference to `BCryptGenRandom`
> referenced from `nothrow @nogc @trusted bool
> std.random.bcryptGenRandom!(ulong).bcryptGenRandom(out ulong)`
> perhaps a library needs to be added with the `-L`
> flag or `pragma(lib, ...)`
>
> * The terminal process
> "C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe
> -Command & 'rdmd' 'c:\dev\D\21 -
> 30\c27_a_do_while_loop\source\app.d'" terminated with exit
> code: 1.
>
> Is there another way to get a random integer between 1 and 100?
could be this:
Windows link error with std.random.uniform() in v2.111 #10731
https://github.com/dlang/phobos/issues/10731
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