# nocov for recent missed lines

R/data.table.R

@@ -2256,8 +2256,8 @@ tail.data.table = function(x, n=6L, ...) {
 
 "$<-.data.table" = function(x, name, value) {
   if (!cedta()) {
-    ans = `$<-.data.frame`(x, name, value)
-    return(setalloccol(ans))           # over-allocate (again)
+    ans = `$<-.data.frame`(x, name, value) # nocov
+    return(setalloccol(ans))           # nocov. over-allocate (again)
   }
   x = copy(x)
   set(x,j=name,value=value)  # important i is missing here
@@ -2430,7 +2430,7 @@ which_ = function(x, bool = TRUE) {
 }
 
 is.na.data.table = function(x) {
-  if (!cedta()) return(is.na.data.frame(x))
+  if (!cedta()) return(is.na.data.frame(x)) # nocov
   do.call(cbind, lapply(x, is.na))
 }
 

R/fread.R

@@ -158,6 +158,7 @@ yaml=FALSE, autostart=NA, tmpdir=tempdir(), tz="UTC")
     }
     # whitespace at the beginning or end of na.strings is checked at C level and is an error there; test 1804
   }
+  # nocov start. Tested in other.Rraw tests 16, not in the main suite.
   if (yaml) {
     if (!requireNamespace('yaml', quietly = TRUE))
       stopf("'data.table' relies on the package 'yaml' to parse the file header; please add this to your library with install.packages('yaml') and try again.") # nocov
@@ -267,6 +268,7 @@ yaml=FALSE, autostart=NA, tmpdir=tempdir(), tz="UTC")
     }
     if (is.integer(skip)) skip = skip + n_read
   }
+  # nocov end
   warnings2errors = getOption("warn") >= 2
   stopifnot(identical(tz,"UTC") || identical(tz,""))
   if (tz=="") {
@@ -341,7 +343,7 @@ yaml=FALSE, autostart=NA, tmpdir=tempdir(), tz="UTC")
       key = cols_from_csv(key)
     setkeyv(ans, key)
   }
-  if (yaml) setattr(ans, 'yaml_metadata', yaml_header)
+  if (yaml) setattr(ans, 'yaml_metadata', yaml_header) # nocov
   if (!is.null(index) && data.table) {
     if (!all(vapply_1b(index, is.character)))
       stopf("index argument of data.table() must be a character vector naming columns (NB: col.names are applied before this)")

R/fwrite.R

@@ -91,6 +91,7 @@ fwrite = function(x, file="", append=FALSE, quote="auto",
       return(invisible())
     }
   }
+  # nocov start. See test 17 in other.Rraw, not tested in the main suite.
   yaml = if (!yaml) "" else {
     if (!requireNamespace('yaml', quietly=TRUE))
       stopf("'data.table' relies on the package 'yaml' to write the file header; please add this to your library with install.packages('yaml') and try again.") # nocov
@@ -114,6 +115,7 @@ fwrite = function(x, file="", append=FALSE, quote="auto",
     )
     paste0('---', eol, yaml::as.yaml(yaml_header, line.sep=eol), '---', eol) # NB: as.yaml adds trailing newline
   }
+  # nocov end
   file = enc2native(file) # CfwriteR cannot handle UTF-8 if that is not the native encoding, see #3078.
   .Call(CfwriteR, x, file, sep, sep2, eol, na, dec, quote, qmethod=="escape", append,
         row.names, col.names, logical01, scipen, dateTimeAs, buffMB, nThread,

R/last.R

@@ -1,6 +1,7 @@
 # data.table defined last(x) with no arguments, just for last. If you need the last 10 then use tail(x,10).
 # for xts class objects it will dispatch to xts::last
 # reworked to avoid loading xts namespace (#3857) then again to fix dispatching of xts class (#4053)
+# nocov start. Tests 19.* in other.Rraw, not in the main suite.
 last = function(x, n=1L, ...) {
   verbose = isTRUE(getOption("datatable.verbose", FALSE))
   if (!inherits(x, "xts")) {
@@ -82,3 +83,4 @@ first = function(x, n=1L, ...) {
     xts::first(x, n=n, ...)
   }
 }
+# nocov end

R/xts.R

@@ -1,3 +1,4 @@
+# nocov start. See tests 18.* in other.Rraw, not in the main suite.
 as.data.table.xts = function(x, keep.rownames = TRUE, key=NULL, ...) {
   stopifnot(requireNamespace("xts"), !missing(x), xts::is.xts(x))
   if (length(keep.rownames) != 1L) stopf("keep.rownames must be length 1")
@@ -26,3 +27,4 @@ as.xts.data.table = function(x, numeric.only = TRUE, ...) {
   }
   return(xts::xts(as.matrix(r), order.by = if (inherits(x[[1L]], "IDate")) as.Date(x[[1L]]) else x[[1L]]))
 }
+# nocov end

src/assign.c

@@ -1190,7 +1190,7 @@ const char *memrecycle(const SEXP target, const SEXP where, const int start, con
       }
     }
   } break;
-  default :
+  default : // # nocov
     error(_("Unsupported column type in assign.c:memrecycle '%s'"), type2char(TYPEOF(target)));  // # nocov
   }
   UNPROTECT(protecti);
@@ -1244,7 +1244,7 @@ void writeNA(SEXP v, const int from, const int n, const bool listNA)
   case EXPRSXP :
     for (int i=from; i<=to; ++i) SET_VECTOR_ELT(v, i, R_NilValue);
     break;
-  default :
+  default : // # nocov
     internal_error(__func__, "Unsupported type '%s' for v", type2char(TYPEOF(v)));  // # nocov
   }
 }
@@ -1283,8 +1283,8 @@ void savetl_init(void) {
   saveds = (SEXP *)malloc(nalloc * sizeof(SEXP));
   savedtl = (R_len_t *)malloc(nalloc * sizeof(R_len_t));
   if (!saveds || !savedtl) {
-    free(saveds); free(savedtl);
-    savetl_end();                                                        // # nocov
+    free(saveds); free(savedtl);                                            // # nocov
+    savetl_end();                                                           // # nocov
     error(_("Failed to allocate initial %d items in savetl_init"), nalloc); // # nocov
   }
 }

src/between.c

@@ -192,7 +192,7 @@ SEXP between(SEXP x, SEXP lower, SEXP upper, SEXP incbounds, SEXP NAboundsArg, S
     }
     if (verbose) Rprintf(_("between non-parallel processing of character took %8.3fs\n"), omp_get_wtime()-tic);
   } break;
-  default:
+  default: // # nocov
     internal_error(__func__, "unsupported type '%s' should have been caught at R level", type2char(TYPEOF(x)));  // # nocov
   }
   UNPROTECT(nprotect);

src/bmerge.c

@@ -381,8 +381,8 @@ void bmerge_r(int xlowIn, int xuppIn, int ilowIn, int iuppIn, int col, int thisg
     }
     break;
   // supported types were checked up front to avoid handling an error here in (future) parallel region
-  default:
-    error(_("Type '%s' is not supported for joining/merging"), type2char(TYPEOF(xc)));
+  default: // # nocov
+    internal_error("Invalid join/merge type '%s' should have been caught earlier", type2char(TYPEOF(xc))); // # nocov
   }
 
   if (xlow<xupp-1 || rollLow || rollUpp) { // if value found, xlow and xupp surround it, unlike standard binary search where low falls on it

src/chmatch.c

@@ -98,8 +98,8 @@ static SEXP chmatchMain(SEXP x, SEXP table, int nomatch, bool chin, bool chmatch
     int *counts = (int *)calloc(nuniq, sizeof(int));
     int *map =    (int *)calloc(mapsize, sizeof(int));
     if (!counts || !map) {
-      free(counts); free(map);
       // # nocov start
+      free(counts); free(map);
       for (int i=0; i<tablelen; i++) SET_TRUELENGTH(td[i], 0);
       savetl_end();
       error(_("Failed to allocate %"PRIu64" bytes working memory in chmatchdup: length(table)=%d length(unique(table))=%d"), ((uint64_t)tablelen*2+nuniq)*sizeof(int), tablelen, nuniq);

src/dogroups.c

@@ -137,7 +137,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
   // using <- in j (which is valid, useful and tested), they are repointed to the .SD cols for each group.
   SEXP names = PROTECT(getAttrib(SDall, R_NamesSymbol)); nprotect++;
   if (length(names) != length(SDall))
-    error("length(names)!=length(SD)"); // # notranslate
+    internal_error("length(names)!=length(SD)");
   SEXP *nameSyms = (SEXP *)R_alloc(length(names), sizeof(SEXP));
 
   for(int i=0; i<length(SDall); ++i) {
@@ -154,7 +154,7 @@ SEXP dogroups(SEXP dt, SEXP dtcols, SEXP groups, SEXP grpcols, SEXP jiscols, SEX
 
   SEXP xknames = PROTECT(getAttrib(xSD, R_NamesSymbol)); nprotect++;
   if (length(xknames) != length(xSD))
-    error("length(xknames)!=length(xSD)"); // # notranslate
+    internal_error("length(xknames)!=length(xSD)");
   SEXP *xknameSyms = (SEXP *)R_alloc(length(xknames), sizeof(SEXP));
   for(int i=0; i<length(xSD); ++i) {
     if (SIZEOF(VECTOR_ELT(xSD, i))==0)
@@ -544,7 +544,7 @@ SEXP growVector(SEXP x, const R_len_t newlen)
     for (int i=0; i<len; ++i)
       SET_VECTOR_ELT(newx, i, xd[i]);
   } break;
-  default :
+  default : // # nocov
     internal_error(__func__, "type '%s' not supported", type2char(TYPEOF(x)));  // # nocov
   }
   // if (verbose) Rprintf(_("Growing vector from %d to %d items of type '%s'\n"), len, newlen, type2char(TYPEOF(x)));

src/fastmean.c

@@ -79,7 +79,7 @@ SEXP fastmean(SEXP args)
       }
       REAL(ans)[0] = (double) s;
       break;
-    default:
+    default: // # nocov
       internal_error(__func__, "type '%s' not caught earlier in fastmean", type2char(TYPEOF(x)));  // # nocov
     }
   } else {  // narm==FALSE
@@ -107,7 +107,7 @@ SEXP fastmean(SEXP args)
       }
       REAL(ans)[0] = (double) s;
       break;
-    default:
+    default: // # nocov
       internal_error(__func__, "type '%s' not caught earlier in fastmean", type2char(TYPEOF(x)));  // # nocov
     }
   }

src/fmelt.c

@@ -804,7 +804,7 @@ SEXP fmelt(SEXP DT, SEXP id, SEXP measure, SEXP varfactor, SEXP valfactor, SEXP
   int protecti=0;
   dtnames = PROTECT(getAttrib(DT, R_NamesSymbol)); protecti++;
   if (isNull(dtnames))
-    internal_error(__func__, "names(data) is NULL");
+    internal_error(__func__, "names(data) is NULL"); // # nocov
   if (LOGICAL(narmArg)[0] == TRUE) narm = TRUE;
   if (LOGICAL(verboseArg)[0] == TRUE) verbose = TRUE;
   struct processData data;

src/forder.c

@@ -283,8 +283,8 @@ static void cradix(SEXP *x, int n)
   cradix_counts = (int *)calloc(ustr_maxlen*256, sizeof(int));  // counts for the letters of left-aligned strings
   cradix_xtmp = (SEXP *)malloc(ustr_n*sizeof(SEXP));
   if (!cradix_counts || !cradix_xtmp) {
-    free(cradix_counts); free(cradix_xtmp);
-    STOP(_("Failed to alloc cradix_counts and/or cradix_tmp"));
+    free(cradix_counts); free(cradix_xtmp); // # nocov
+    STOP(_("Failed to alloc cradix_counts and/or cradix_tmp")); // # nocov
   }
   cradix_r(x, n, 0);
   free(cradix_counts); cradix_counts=NULL;
@@ -772,12 +772,11 @@ SEXP forder(SEXP DT, SEXP by, SEXP retGrpArg, SEXP retStatsArg, SEXP sortGroupsA
       }}
       free_ustr();  // ustr could be left allocated and reused, but free now in case large and we're tight on ram
       break;
-    default:
-       internal_error_with_cleanup(__func__, "column not supported, not caught earlier");  // # nocov
+    default: // # nocov
+       internal_error_with_cleanup(__func__, "column not supported, not caught earlier"); // # nocov
     }
     nradix += nbyte-1+(spare==0);
     TEND(4)
-    // Rprintf(_("Written key for column %d\n"), col);
   }
   if (key[nradix]!=NULL) nradix++;  // nradix now number of bytes in key
   #ifdef TIMING_ON
@@ -789,17 +788,17 @@ SEXP forder(SEXP DT, SEXP by, SEXP retGrpArg, SEXP retStatsArg, SEXP sortGroupsA
   TMP =  (int *)malloc(nth*UINT16_MAX*sizeof(int)); // used by counting sort (my_n<=65536) in radix_r()
   UGRP = (uint8_t *)malloc(nth*256);                // TODO: align TMP and UGRP to cache lines (and do the same for stack allocations too)
   if (!TMP || !UGRP /*|| TMP%64 || UGRP%64*/) {
-    free(TMP); free(UGRP);
-    STOP(_("Failed to allocate TMP or UGRP or they weren't cache line aligned: nth=%d"), nth);
+    free(TMP); free(UGRP); // # nocov
+    STOP(_("Failed to allocate TMP or UGRP or they weren't cache line aligned: nth=%d"), nth); // # nocov
   }
 
   if (retgrp) {
     gs_thread = calloc(nth, sizeof(int *));     // thread private group size buffers
     gs_thread_alloc = calloc(nth, sizeof(int));
     gs_thread_n = calloc(nth, sizeof(int));
     if (!gs_thread || !gs_thread_alloc || !gs_thread_n) {
-      free(gs_thread); free(gs_thread_alloc); free(gs_thread_n);
-      STOP(_("Could not allocate (very tiny) group size thread buffers"));
+      free(gs_thread); free(gs_thread_alloc); free(gs_thread_n); // # nocov
+      STOP(_("Could not allocate (very tiny) group size thread buffers")); // # nocov
     }
   }
   if (nradix) {
@@ -917,7 +916,7 @@ void radix_r(const int from, const int to, const int radix) {
     uint8_t *restrict my_key = key[radix]+from;  // safe to write as we don't use this radix again
     uint8_t *o = (uint8_t *)malloc(my_n * sizeof(uint8_t));
     if (!o)
-      STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(uint8_t)), "o");
+      STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(uint8_t)), "o"); // # nocov
     // if last key (i.e. radix+1==nradix) there are no more keys to reorder so we could reorder osub by reference directly and save allocating and populating o just
     // to use it once. However, o's type is uint8_t so many moves within this max-256 vector should be faster than many moves in osub (4 byte or 8 byte ints) [1 byte
     // type is always aligned]
@@ -986,8 +985,8 @@ void radix_r(const int from, const int to, const int radix) {
       // reorder osub and each remaining ksub
       int *TMP = malloc(my_n * sizeof(int));
       if (!TMP) {
-        free(o);
-        STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(int)), "TMP");
+        free(o); // # nocov
+        STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(int)), "TMP"); // # nocov
       }
       const int *restrict osub = anso+from;
       for (int i=0; i<my_n; i++) TMP[i] = osub[o[i]];
@@ -1009,7 +1008,7 @@ void radix_r(const int from, const int to, const int radix) {
     int ngrp=0; //minor TODO: could know number of groups with certainty up above
     int *my_gs = malloc(my_n * sizeof(int));
     if (!my_gs)
-      STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(int)), "my_gs");
+      STOP(_("Failed to allocate %d bytes for '%s'."), (int)(my_n * sizeof(int)), "my_gs"); // # nocov
     my_gs[ngrp]=1;
     for (int i=1; i<my_n; i++) {
       if (my_key[i]!=my_key[i-1]) my_gs[++ngrp] = 1;
@@ -1111,7 +1110,7 @@ void radix_r(const int from, const int to, const int radix) {
     }
     int *my_gs = malloc((ngrp==0 ? 256 : ngrp) * sizeof(int)); // ngrp==0 when sort and skip==true; we didn't count the non-zeros in my_counts yet in that case
     if (!my_gs)
-      STOP(_("Failed to allocate %d bytes for '%s'."), (int)((ngrp==0 ? 256 : ngrp) * sizeof(int)), "my_gs");
+      STOP(_("Failed to allocate %d bytes for '%s'."), (int)((ngrp==0 ? 256 : ngrp) * sizeof(int)), "my_gs"); // # nocov
     if (sortType!=0) {
       ngrp=0;
       for (int i=0; i<256; i++) if (my_counts[i]) my_gs[ngrp++]=my_counts[i];  // this casts from uint16_t to int32, too
@@ -1141,8 +1140,8 @@ void radix_r(const int from, const int to, const int radix) {
   uint8_t  *ugrps =  malloc(nBatch*256*sizeof(uint8_t));
   int      *ngrps =  calloc(nBatch    ,sizeof(int));
   if (!counts || !ugrps || !ngrps) {
-    free(counts); free(ugrps); free(ngrps);
-    STOP(_("Failed to allocate parallel counts. my_n=%d, nBatch=%d"), my_n, nBatch);
+    free(counts); free(ugrps); free(ngrps); // # nocov
+    STOP(_("Failed to allocate parallel counts. my_n=%d, nBatch=%d"), my_n, nBatch); // # nocov
   }
 
   bool skip=true;
@@ -1242,7 +1241,7 @@ void radix_r(const int from, const int to, const int radix) {
 
   int *starts = calloc(nBatch*256, sizeof(int));  // keep starts the same shape and ugrp order as counts
   if (!starts)
-    STOP(_("Failed to allocate %d bytes for '%s'."), (int)(nBatch*256*sizeof(int)), "starts");
+    STOP(_("Failed to allocate %d bytes for '%s'."), (int)(nBatch*256*sizeof(int)), "starts"); // # nocov
   for (int j=0, sum=0; j<ngrp; j++) {  // iterate through columns (ngrp bytes)
     uint16_t *tmp1 = counts+ugrp[j];
     int      *tmp2 = starts+ugrp[j];
@@ -1259,7 +1258,7 @@ void radix_r(const int from, const int to, const int radix) {
   if (!skip) {
     int *TMP = malloc(my_n * sizeof(int));
     if (!TMP)
-      STOP(_("Unable to allocate TMP for my_n=%d items in parallel batch counting"), my_n);
+      STOP(_("Unable to allocate TMP for my_n=%d items in parallel batch counting"), my_n); // # nocov
     #pragma omp parallel for num_threads(getDTthreads(nBatch, false))
     for (int batch=0; batch<nBatch; batch++) {
       const int *restrict      my_starts = starts + batch*256;
@@ -1298,7 +1297,7 @@ void radix_r(const int from, const int to, const int radix) {
 
   int *my_gs = malloc(ngrp * sizeof(int));
   if (!my_gs)
-    STOP(_("Failed to allocate %d bytes for '%s'."), (int)(ngrp * sizeof(int)), "my_gs");
+    STOP(_("Failed to allocate %d bytes for '%s'."), (int)(ngrp * sizeof(int)), "my_gs"); // # nocov
   for (int i=1; i<ngrp; i++) my_gs[i-1] = starts[ugrp[i]] - starts[ugrp[i-1]];   // use the first row of starts to get totals
   my_gs[ngrp-1] = my_n - starts[ugrp[ngrp-1]];
 
@@ -1441,7 +1440,7 @@ SEXP issorted(SEXP x, SEXP by)
       types[j] = 3;
       ptrs[j] = (const char *)STRING_PTR_RO(col);
       break;
-    default:
+    default: // # nocov
       STOP(_("type '%s' is not yet supported"), type2char(TYPEOF(col)));  // # nocov
     }
   }
@@ -1475,7 +1474,7 @@ SEXP issorted(SEXP x, SEXP by)
                 strcmp(CHAR(p[0]), CHAR(p[-1]))) >= 0;
         }
       } break;
-      default :
+      default : // # nocov
         STOP(_("type '%s' is not yet supported"), type2char(TYPEOF(x)));  // # nocov
       }
       if (!ok) return ScalarLogical(FALSE);  // not sorted so return early