Bug 19052 – dmd-2.081.0 generates compilation issue: Error: module `stdlib` is in file 'std/c/stdlib.d' which cannot be read

When using Travis CI or 'curl -fsS https://dlang.org/install.sh | bash -s dmd' to install DMD as of today, this now installs dmd-2.081.0. Prior to this date, this command installed dmd-2.080.1 When running compilations using dmd-2.081.0 - either locally of via Travis CI, compilations now fail with the following error message: Error: module `stdlib` is in file 'std/c/stdlib.d' which cannot be read import path[0] = /root/dlang/dmd-2.081.0/linux/bin64/../../src/phobos import path[1] = /root/dlang/dmd-2.081.0/linux/bin64/../../src/druntime/import Downgrading to dmd-2.080.1 there is no error & compilation succeeds. Is this a regression between dmd-2.081.0 and dmd-2.080.1 or is there some sort of change required in my code due to changes in stdlib inclusions & needing to add something?

Whatever you're compiling is using the `std.c` package from Phobos. That package has been deprecated for a long time and was finally removed in 2.081. Use the`core.stc` package instead: https://github.com/dlang/phobos/pull/6515 https://dlang.org/changelog/2.081.0.html#remove_std_c

Thanks I have looked at the code and found the offending entry, however based on the changelog: "Use the core.stdc package instead." I now get the following: Error: module `stdc` is in file 'core/stdc.d' which cannot be read import path[0] = /root/dlang/dmd-2.081.0/linux/bin64/../../src/phobos import path[1] = /root/dlang/dmd-2.081.0/linux/bin64/../../src/druntime/import

need to use core.stdc.stdlib rather than core.stdc as per release notes.

`std.c` is a package. `std.c.stdlib` is a module within that package. Analogously, `core.stdc` is a package and `core.stdc.stdlib` is a module within that package. If your code used to use `std.c.stdlib` then you need to replace it with `core.stdc.stdlib`, not `core.stdc`.