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Turn warning about uninitialized storage returns into an error.

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This commit is contained in:
Daniel Kirchner
2018-08-02 19:34:38 +02:00
parent 009a55c82d
commit 35c5b7de25
23 changed files with 184 additions and 183 deletions
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test/libsolidity/syntaxTests/controlFlow/storageReturn/assembly_err.sol
+10
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@@ -0,0 +1,10 @@
contract C {
struct S { bool f; }
S s;
function f() internal pure returns (S storage) {
assembly {
}
}
}
// ----
// TypeError: (87-88): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/assembly_fine.sol
+2 -2
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@@ -8,7 +8,7 @@ contract C {
}
function g(bool flag) internal returns (S storage c) {
// control flow in assembly will not be analyzed for now,
// so this will not issue a warning
// so this will not issue an error
assembly {
if flag {
sstore(c_slot, sload(s_slot))
@@ -17,7 +17,7 @@ contract C {
}
function h() internal returns (S storage c) {
// any reference from assembly will be sufficient for now,
// so this will not issue a warning
// so this will not issue an error
assembly {
sstore(s_slot, sload(c_slot))
}
test/libsolidity/syntaxTests/controlFlow/storageReturn/assembly_warn.sol
-10
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@@ -1,10 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal pure returns (S storage) {
assembly {
}
}
}
// ----
// Warning: (87-88): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/dowhile_err.sol
+52
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@@ -0,0 +1,52 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
do {
break;
c = s;
} while(false);
}
function g() internal view returns (S storage c) {
do {
if (s.f) {
continue;
c = s;
}
else {
}
} while(false);
}
function h() internal view returns (S storage c) {
do {
if (s.f) {
break;
}
else {
c = s;
}
} while(false);
}
function i() internal view returns (S storage c) {
do {
if (s.f) {
continue;
}
else {
c = s;
}
} while(false);
}
function j() internal view returns (S storage c) {
do {
continue;
c = s;
} while(false);
}
}
// ----
// TypeError: (87-98): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (223-234): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (440-451): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (654-665): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (871-882): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/dowhile_warn.sol
-52
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@@ -1,52 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
do {
break;
c = s;
} while(false);
}
function g() internal view returns (S storage c) {
do {
if (s.f) {
continue;
c = s;
}
else {
}
} while(false);
}
function h() internal view returns (S storage c) {
do {
if (s.f) {
break;
}
else {
c = s;
}
} while(false);
}
function i() internal view returns (S storage c) {
do {
if (s.f) {
continue;
}
else {
c = s;
}
} while(false);
}
function j() internal view returns (S storage c) {
do {
continue;
c = s;
} while(false);
}
}
// ----
// Warning: (87-98): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (223-234): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (440-451): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (654-665): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (871-882): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/emptyReturn_err.sol
+14
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@@ -0,0 +1,14 @@
contract C {
struct S { bool f; }
S s;
function f() internal pure returns (S storage) { return; }
function g() internal view returns (S storage c, S storage) { c = s; return; }
function h() internal view returns (S storage, S storage d) { d = s; return; }
function i() internal pure returns (S storage, S storage) { return; }
}
// ----
// TypeError: (87-88): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (163-164): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (233-234): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (316-317): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (327-328): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/emptyReturn_fine.sol
+1
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@@ -2,5 +2,6 @@ contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c, S storage d) { c = s; d = s; return; }
function g() internal view returns (S storage, S storage) { return (s,s); }
}
// ----
test/libsolidity/syntaxTests/controlFlow/storageReturn/emptyReturn_warn.sol
-15
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@@ -1,15 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal pure returns (S storage) { return; }
function g() internal view returns (S storage c, S storage) { c = s; return; }
function h() internal view returns (S storage, S storage d) { d = s; return; }
function i() internal pure returns (S storage, S storage) { return; }
function j() internal view returns (S storage, S storage) { return (s,s); }
}
// ----
// Warning: (87-88): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (163-164): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (233-234): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (316-317): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (327-328): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/for_err.sol
+16
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@@ -0,0 +1,16 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
for(;; c = s) {
}
}
function g() internal view returns (S storage c) {
for(;;) {
c = s;
}
}
}
// ----
// TypeError: (87-98): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (182-193): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/for_warn.sol
-16
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@@ -1,16 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
for(;; c = s) {
}
}
function g() internal view returns (S storage c) {
for(;;) {
c = s;
}
}
}
// ----
// Warning: (87-98): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (182-193): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/if_err.sol
+18
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@@ -0,0 +1,18 @@
contract C {
struct S { bool f; }
S s;
function f(bool flag) internal view returns (S storage c) {
if (flag) c = s;
}
function g(bool flag) internal returns (S storage c) {
if (flag) c = s;
else
{
if (!flag) c = s;
else s.f = true;
}
}
}
// ----
// TypeError: (96-107): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (186-197): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/if_warn.sol
-18
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@@ -1,18 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f(bool flag) internal view returns (S storage c) {
if (flag) c = s;
}
function g(bool flag) internal returns (S storage c) {
if (flag) c = s;
else
{
if (!flag) c = s;
else s.f = true;
}
}
}
// ----
// Warning: (96-107): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (186-197): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/modifier_err.sol
+22
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@@ -0,0 +1,22 @@
contract C {
modifier revertIfNoReturn() {
_;
revert();
}
modifier ifFlag(bool flag) {
if (flag)
_;
}
struct S { uint a; }
S s;
function f(bool flag) ifFlag(flag) internal view returns(S storage) {
return s;
}
function g(bool flag) ifFlag(flag) revertIfNoReturn() internal view returns(S storage) {
return s;
}
}
// ----
// TypeError: (249-250): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (367-368): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/modifier_warn.sol
-22
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@@ -1,22 +0,0 @@
contract C {
modifier revertIfNoReturn() {
_;
revert();
}
modifier ifFlag(bool flag) {
if (flag)
_;
}
struct S { uint a; }
S s;
function f(bool flag) ifFlag(flag) internal view returns(S storage) {
return s;
}
function g(bool flag) ifFlag(flag) revertIfNoReturn() internal view returns(S storage) {
return s;
}
}
// ----
// Warning: (249-250): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (367-368): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/short_circuit_err.sol
+18
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@@ -0,0 +1,18 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
false && (c = s).f;
}
function g() internal view returns (S storage c) {
true || (c = s).f;
}
function h() internal view returns (S storage c) {
// expect error, although this is always fine
true && (false || (c = s).f);
}
}
// ----
// TypeError: (87-98): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (176-187): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (264-275): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/short_circuit_warn.sol
-18
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@@ -1,18 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
false && (c = s).f;
}
function g() internal view returns (S storage c) {
true || (c = s).f;
}
function h() internal view returns (S storage c) {
// expect warning, although this is always fine
true && (false || (c = s).f);
}
}
// ----
// Warning: (87-98): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (176-187): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (264-275): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/ternary_err.sol
+13
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@@ -0,0 +1,13 @@
contract C {
struct S { bool f; }
S s;
function f(bool flag) internal view returns (S storage c) {
flag ? (c = s).f : false;
}
function g(bool flag) internal view returns (S storage c) {
flag ? false : (c = s).f;
}
}
// ----
// TypeError: (96-107): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
// TypeError: (200-211): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/ternary_warn.sol
-13
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@@ -1,13 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f(bool flag) internal view returns (S storage c) {
flag ? (c = s).f : false;
}
function g(bool flag) internal view returns (S storage c) {
flag ? false : (c = s).f;
}
}
// ----
// Warning: (96-107): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
// Warning: (200-211): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.
test/libsolidity/syntaxTests/controlFlow/storageReturn/while_err.sol
+11
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@@ -0,0 +1,11 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
while(false) {
c = s;
}
}
}
// ----
// TypeError: (87-98): This variable is of storage pointer type and might be returned without assignment and could be used uninitialized. Assign the variable (potentially from itself) to fix this error.
test/libsolidity/syntaxTests/controlFlow/storageReturn/while_warn.sol
-11
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@@ -1,11 +0,0 @@
contract C {
struct S { bool f; }
S s;
function f() internal view returns (S storage c) {
while(false) {
c = s;
}
}
}
// ----
// Warning: (87-98): This variable is of storage pointer type and might be returned without assignment. This can cause storage corruption. Assign the variable (potentially from itself) to remove this warning.