diff --git a/error.c b/error.c
index d3455ab9e6..a52b7710d2 100644
--- a/error.c
+++ b/error.c
@@ -93,7 +93,7 @@ QDict *error_get_data(Error *err)
 void error_set_field(Error *err, const char *field, const char *value)
 {
     QDict *dict = qdict_get_qdict(err->obj, "data");
-    return qdict_put(dict, field, qstring_from_str(value));
+    qdict_put(dict, field, qstring_from_str(value));
 }
 
 void error_free(Error *err)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index a6f5a84927..461fa597d4 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -92,8 +92,8 @@ ETEXI
     },
 
 STEXI
-@item block_job_set_stream
-@findex block_job_set_stream
+@item block_job_set_speed
+@findex block_job_set_speed
 Set maximum speed for a background block operation.
 ETEXI
 
diff --git a/hw/e1000.c b/hw/e1000.c
index 7babc0b06e..9c764624f9 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -481,7 +481,7 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
         } while (split_size -= bytes);
     } else if (!tp->tse && tp->cptse) {
         // context descriptor TSE is not set, while data descriptor TSE is set
-        DBGOUT(TXERR, "TCP segmentaion Error\n");
+        DBGOUT(TXERR, "TCP segmentation error\n");
     } else {
         split_size = MIN(sizeof(tp->data) - tp->size, split_size);
         pci_dma_read(&s->dev, addr, tp->data + tp->size, split_size);
diff --git a/hw/pflash_cfi01.c b/hw/pflash_cfi01.c
index b03f623cb1..d1c742379b 100644
--- a/hw/pflash_cfi01.c
+++ b/hw/pflash_cfi01.c
@@ -144,7 +144,6 @@ static uint32_t pflash_read (pflash_t *pfl, target_phys_addr_t offset,
             } else {
                 ret = p[offset];
                 ret |= p[offset + 1] << 8;
-                ret |= p[offset + 1] << 8;
                 ret |= p[offset + 2] << 16;
                 ret |= p[offset + 3] << 24;
             }
diff --git a/hw/qxl.c b/hw/qxl.c
index db2318e293..c3540c3d50 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1370,7 +1370,7 @@ async_common:
     case QXL_IO_DESTROY_SURFACE_WAIT:
         if (val >= NUM_SURFACES) {
             qxl_guest_bug(d, "QXL_IO_DESTROY_SURFACE (async=%d):"
-                             "%d >= NUM_SURFACES", async, val);
+                             "%" PRIu64 " >= NUM_SURFACES", async, val);
             goto cancel_async;
         }
         qxl_spice_destroy_surface_wait(d, val, async);
diff --git a/hw/qxl.h b/hw/qxl.h
index 11a0db3f7d..cbb1e2d6d4 100644
--- a/hw/qxl.h
+++ b/hw/qxl.h
@@ -127,7 +127,7 @@ typedef struct PCIQXLDevice {
 
 /* qxl.c */
 void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int group_id);
-void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg, ...);
+void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg, ...) GCC_FMT_ATTR(2, 3);
 
 void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id,
                            struct QXLRect *area, struct QXLRect *dirty_rects,
diff --git a/spice-qemu-char.c b/spice-qemu-char.c
index 1e735ffd09..09aa22d566 100644
--- a/spice-qemu-char.c
+++ b/spice-qemu-char.c
@@ -209,7 +209,7 @@ CharDriverState *qemu_chr_open_spice(QemuOpts *opts)
         }
     }
     if (subtype == NULL) {
-        fprintf(stderr, "spice-qemu-char: unsupported name\n");
+        fprintf(stderr, "spice-qemu-char: unsupported name: %s\n", name);
         print_allowed_subtypes();
         return NULL;
     }
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 0000000000..f9041f3d32
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,13 @@
+check-qdict
+check-qfloat
+check-qint
+check-qjson
+check-qlist
+check-qstring
+test-qapi-types.[ch]
+test-qapi-visit.[ch]
+test-qmp-commands.h
+test-qmp-commands
+test-qmp-input-strict
+test-qmp-marshal.c
+*-test