Update error handling inside extlibs

src/interpreter.c

@@ -90,7 +90,7 @@ bool isMainScopeGlobal = true;
         printGroundInstruction(error->where);
         printf("\n");
     }
-    if (error->line > -1) {
+    if (error->hasLine) {
         printf("  ErrorLine: %zu\n", error->line + 1);
     }
     exit(1);
@@ -1762,6 +1762,9 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
                 if (function->nativeFn) {
                     GroundValue returnValue = function->nativeFn(scope, argsList);
                     if (returnValue.type == ERROR) {
+                        returnValue.data.errorVal.line = currentInstruction;
+                        returnValue.data.errorVal.hasLine = true;
+                        returnValue.data.errorVal.where = in;
                         if (scope->isMainScope) {
                             throwError(&returnValue.data.errorVal);
                         }

src/types.c

@@ -562,7 +562,8 @@ GroundError createGroundError(char* what, char* type, GroundInstruction* where,
         ge.type = malloc(strlen(type) + 1);
         strcpy(ge.type, type);
     } else {
-        ge.type = "GenericError";
+        ge.type = malloc(strlen("GenericError") + 1);
+        strcpy(ge.type, "GenericError");
     }
 
     if (where != NULL) {
@@ -575,7 +576,8 @@ GroundError createGroundError(char* what, char* type, GroundInstruction* where,
     if (line != NULL) {
         ge.line = *line;
     } else {
-        ge.line = -1;
+        ge.line = 0;
+        ge.hasLine = false;
     }
 
     return ge;

src/types.h

@@ -51,6 +51,7 @@ typedef struct GroundError {
     char* type;
     struct GroundInstruction* where;
     size_t line;
+    bool hasLine;
 } GroundError;
 
 /*