diff --git a/configure b/configure
index 4ecb116b47..065a957a99 100755
--- a/configure
+++ b/configure
@@ -2015,14 +2015,13 @@ cxx_default="g++"
 host_cc_default="gcc"
 install="install"
 ln_s="ln -sf"
-nm_default="nm"
+nm_default="nm -g"
 objformat="elf"
 pkg_config_default=pkg-config
 ranlib="ranlib"
 strip_default="strip"
 yasmexe_default="yasm"
 
-nm_opts='-g'
 nogas=":"
 
 # machine
@@ -2309,7 +2308,7 @@ strip_default="${cross_prefix}${strip_default}"
 
 sysinclude_default="${sysroot}/usr/include"
 
-set_default cc cxx nm pkg_config strip sysinclude yasmexe
+set_default cc cxx pkg_config strip sysinclude yasmexe
 enabled cross_compile || host_cc_default=$cc
 set_default host_cc
 
@@ -2988,7 +2987,7 @@ case $target_os in
         # guards for processor-specific code, instead suppress
         # generation of the HWCAPS ELF section on Solaris x86 only.
         enabled_all suncc x86 && echo "hwcap_1 = OVERRIDE;" > mapfile && add_ldflags -Wl,-M,mapfile
-        nm_opts='-P -g'
+        nm_default='nm -P -g'
         ;;
     netbsd)
         disable symver
@@ -3191,6 +3190,7 @@ echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFI
 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable pic
 
 set_default $PATHS_LIST
+set_default nm
 
 # we need to build at least one lib type
 if ! enabled_any static shared; then
@@ -3244,7 +3244,7 @@ enabled pic && enable_pic
 check_cc <<EOF || die "Symbol mangling check failed."
 int ff_extern;
 EOF
-sym=$($nm $nm_opts $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
+sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
 extern_prefix=${sym%%ff_extern*}
 
 check_cc <<EOF && enable_weak inline_asm
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 226312e897..46dd0b45ae 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -671,7 +671,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
             if (*bd->opt_order > sconf->max_order) {
                 *bd->opt_order = sconf->max_order;
                 av_log(avctx, AV_LOG_ERROR, "Predictor order too large!\n");
-                return -1;
+                return AVERROR_INVALIDDATA;
             }
         } else {
             *bd->opt_order = sconf->max_order;
@@ -706,7 +706,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
                     int offset     = parcor_rice_table[sconf->coef_table][k][0];
                     quant_cof[k] = decode_rice(gb, rice_param) + offset;
                     if (quant_cof[k] < -64 || quant_cof[k] > 63) {
-                        av_log(avctx, AV_LOG_ERROR, "Quantization coefficient %d is out of range!\n", quant_cof[k]);
+                        av_log(avctx, AV_LOG_ERROR, "quant_cof %d is out of range\n", quant_cof[k]);
                         return AVERROR_INVALIDDATA;
                     }
                 }
@@ -770,7 +770,6 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
         int          delta[8];
         unsigned int k    [8];
         unsigned int b = av_clip((av_ceil_log2(bd->block_length) - 3) >> 1, 0, 5);
-        unsigned int i = start;
 
         // read most significant bits
         unsigned int high;
@@ -781,29 +780,30 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
 
         current_res = bd->raw_samples + start;
 
-        for (sb = 0; sb < sub_blocks; sb++, i = 0) {
+        for (sb = 0; sb < sub_blocks; sb++) {
+            unsigned int sb_len  = sb_length - (sb ? 0 : start);
+
             k    [sb] = s[sb] > b ? s[sb] - b : 0;
             delta[sb] = 5 - s[sb] + k[sb];
 
-            ff_bgmc_decode(gb, sb_length - i, current_res,
+            ff_bgmc_decode(gb, sb_len, current_res,
                         delta[sb], sx[sb], &high, &low, &value, ctx->bgmc_lut, ctx->bgmc_lut_status);
 
-            current_res += sb_length - i;
+            current_res += sb_len;
         }
 
         ff_bgmc_decode_end(gb);
 
 
         // read least significant bits and tails
-        i = start;
         current_res = bd->raw_samples + start;
 
-        for (sb = 0; sb < sub_blocks; sb++, i = 0) {
+        for (sb = 0; sb < sub_blocks; sb++, start = 0) {
             unsigned int cur_tail_code = tail_code[sx[sb]][delta[sb]];
             unsigned int cur_k         = k[sb];
             unsigned int cur_s         = s[sb];
 
-            for (; i < sb_length; i++) {
+            for (; start < sb_length; start++) {
                 int32_t res = *current_res;
 
                 if (res == cur_tail_code) {
@@ -1348,7 +1348,7 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
         }
     } else { // multi-channel coding
         ALSBlockData   bd = { 0 };
-        int            b;
+        int            b, ret;
         int            *reverted_channels = ctx->reverted_channels;
         unsigned int   offset             = 0;
 
@@ -1381,8 +1381,10 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
                 bd.raw_samples = ctx->raw_samples[c] + offset;
                 bd.raw_other   = NULL;
 
-                if (read_block(ctx, &bd) || read_channel_data(ctx, ctx->chan_data[c], c))
-                    return -1;
+                if ((ret = read_block(ctx, &bd)) < 0)
+                    return ret;
+                if ((ret = read_channel_data(ctx, ctx->chan_data[c], c)) < 0)
+                    return ret;
             }
 
             for (c = 0; c < avctx->channels; c++)
@@ -1401,8 +1403,9 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
                 bd.lpc_cof     = ctx->lpc_cof[c];
                 bd.quant_cof   = ctx->quant_cof[c];
                 bd.raw_samples = ctx->raw_samples[c] + offset;
-                if (decode_block(ctx, &bd))
-                    return -1;
+
+                if ((ret = decode_block(ctx, &bd)) < 0)
+                    return ret;
             }
 
             memset(reverted_channels, 0, avctx->channels * sizeof(*reverted_channels));