Pg.Rb Segmentation Fault [Mojave Upgrade]

pg.rb segmentation fault [Mojave upgrade]

As this issue is only occuring in the development environment, I made it conditional. This solution in puma.rb works for me until the bug gets fixed.

workers ENV.fetch("WEB_CONCURRENCY") { 2 } unless Rails.env.development?

Segmentation Fault: 11 for small C program on macOS 10.14 Mojave

With this line

int arr[MAX - MIN];

... you are creating an array of 25 (122 - 97) integers. The valid array indices are 0 ... 24.

First of all, since each array cell is dedicated to a lowercase letter, the array should have 26 cells.

Then, with this statement (and the next ones as well):

for (i = MIN; i <= MAX; i++) arr[i] = 0;

... you are writing into array cells arr[97] to arr[122] that do not exist, overwriting other parts of the program stack. That's why you get a segmentation fault.

Why is static value getting corrupted inside IRB?

You can get this to work by ensuring Ruby keeps a reference to your objects and doesn’t try to GC (or compact) them. The simplest way is probably to use rb_global_variable:

Notice: GC should know about global variables which refer to Ruby's objects, but are not exported to the Ruby world. You need to protect them by

void rb_global_variable(VALUE *var)

In your case it might look like this:

void Init_utsname() {
    init() ;
    rb_global_variable(&machine);
    rb_global_variable(&nodename);
    rb_define_global_function("machine", getMachine, 0);
    rb_define_global_function("nodename", getNodename, 0);
}

Error installing homebrew on MacOS 10.14 Beta Mojave

I believe the problem is that the Command Line Tools for Xcode 10 do not install headers in /usr/include, but the install script checks there:

https://github.com/Homebrew/install/blob/bbf4a3a8b247c7dba159c3d557cc3853dd764171/install#L110

Thankfully, the code that tries to run xcode-select --install is bypassed if STDIN is not a TTY. Try adding a 0<&- after the install command to close STDIN and skip this command. I just tried it and it worked for me.

As an aside, Homebrew does not officially support 10.14 yet, and the maintainers do not want you to file issues about any problems you find. (Pull requests seem welcome, though.) Unfortunately this means that the Homebrew issue tracker is not a place to discuss problems and solutions.

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