From: Shiz Bug-Report: https://github.com/esnme/ultrajson/issues/254 musl default thread size is 80 kiB, so using 128 kiB by default will overflow the stack and cause segmentation faults. Allocating 128 kiB on the stack is a rather bad idea anyway, so we'll lower it to 8 kiB. --- ultrajson-1.35/lib/ultrajson.h +++ ultrajson-1.35-patched/lib/ultrajson.h @@ -77,7 +77,7 @@ /* Dictates and limits how much stack space for buffers UltraJSON will use before resorting to provided heap functions */ #ifndef JSON_MAX_STACK_BUFFER_SIZE -#define JSON_MAX_STACK_BUFFER_SIZE 131072 +#define JSON_MAX_STACK_BUFFER_SIZE 8192 #endif #ifdef _WIN32